MP2632B
All-In-One, 3A, Battery Charger with 3A
Boost Current with Independent Torch-On
and BATT_UVLO Latch-Off Funtion
DESCRIPTION
FEATURES
The MP2632B is a highly integrated, flexible,
switch-mode battery charger with system
power-path management designed for singlecell Li-ion or Li-polymer batteries for use in a
wide range of applications.
The MP2632B can operate in both charge
mode and boost mode to allow for full-system
and battery-power management.
The MP2632B has an integrated VIN-to-SYS
pass-through path to pass the input voltage to
the system. The pass-through path has built-in
over-voltage (OVP) and over-current protection
(OCP) and a higher priority over the charging
path.
When the input power is present, the MP2632B
operates in charge mode. The MP2632B
detects the battery voltage automatically and
charges the battery in three phases: trickle
current, constant current, and constant voltage.
Other features include charge termination and
auto-recharge. The MP2632B also integrates
both input current limit and input voltage
regulation to manage the input power and
prioritize the system load.
In the absence of an input source, the
MP2632B switches to boost mode through PB
to power SYS from the battery. In boost mode,
the OLIM pin programs the output current limit,
and the MP2632B turns off at light load
automatically. The MP2632B also allows for
output short-circuit protection (SCP) to
disconnect the battery completely from the load
in the event of a short-circuit fault. Normal
operation resumes once the short-circuit fault is
removed.
A 4-LED driver is integrated for voltage-based
fuel gauge indication. Together with torch-light
control, the MP2632B provides an all-in-one
solution for power banks and similar
applications without an external microcontroller.
Up to 20V Sustainable Input Voltage
4.65V to 6V Operating Input Voltage Range
Power Management Function, Integrated
Input Current Limit, Input Voltage
Regulation
Up to 3A Programmable Charge Current
Trickle-Charge Function
Selectable 4.2V / 4.35V / 4.45V Charge
Voltage with 0.5% Accuracy
4-LED Driver for Battery Fuel Gauge
Indication
Automatic Turn-Off at Light Load
Input Source Detection
Output Source Signaling
Independent Torch-Light Control
Negative Temperature Coefficient Pin (NTC)
for Battery Temperature Monitoring
Programmable Timer Back-Up Protection
Thermal Regulation and Thermal Shutdown
Internal Battery Reverse Leakage Blocking
Integrated Over-Voltage Protection (OVP)
and Over-Current Protection (OCP) for
Pass-Through Path
Reverse Boost Operation Mode for System
Power
Up to 3.0A Programmable Output Current
Limit for Boost Mode
Integrated Short-Circuit Protection (SCP)
and Output Over-Voltage Protection (OVP)
for Boost Mode
Available in a QFN-26 (4mmx4mm)
Package
APPLICATIONS
Sub-Battery Applications
Power-Bank Applications for Smartphones
Tablets and Other Portable Devices
All MPS parts are lead-free, halogen-free, and adhere to the RoHS
directive. For MPS green status, please visit the MPS website under
Quality Assurance. “MPS” and “The Future of Analog IC Technology” are
registered trademarks of Monolithic Power Systems, Inc.
The MP2632B is available in a QFN-26
(4mmx4mm) package.
MP2632B Rev. 1.0
www.MonolithicPower.com
3/9/2018
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© 2018 MPS. All Rights Reserved.
1
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL APPLICATION
USB OUTPUT
C2 CSYS
USB INPUT
PB
SYS
DM2
5V Input
DP2
SW
RS1
L1
ICHG
IBATT
VIN
CIN
Q1
Q2
Q3
CBATT
CSP
Battery
Q4
DM1
BATT
VBATT
VNTC
DP1
NTC
VNTC
MP2632B
TC
VBATT
VCC
C4
LED1
VB
LED2
ILIM
LED3
OLIM
LED4
ISET
AGND
PGND
VCC
TMR
CTMR
RILIM ROLIM RISET
Table 1: Operation Mode Control
VIN (V)
PB
Operation Mode
Q1, Q2
Q3
Q4
VBATT + 300mV < VIN < 6V
Charging
Discharging
(boost)
OVP
On
SW
SW
Off
SW
SW
VIN > 6V
X
From H to L
for >1.5ms
X
Off
Off
Off
VIN < 2V
H or L
Sleep
Off
Off
Off
VIN < VBATT + 300mV
KEY:
X: Don't care
On: fully on
Off: fully off
SW: switching
MP2632B Rev. 1.0
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© 2018 MPS. All Rights Reserved.
2
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
ORDERING INFORMATION
Part Number*
Package
Top Marking
MP2632BGR
QFN-26 (4mmx4mm)
See Below
* For Tape & Reel, add suffix –Z (e.g.: MP2632BGR–Z)
TOP MARKING
MPS: MPS prefix
Y: Year code
WW: Week code
M2632B: Product code of MP2632BGR
LLLLLL: Lot number
PACKAGE REFERENCE
TOP VIEW
LED1
26
PGND
1
SW
2
SYS
3
SYS
4
VIN
LED2 LED3 LED4 CSP BATT
25
24
23
22
21
VB
20
5
6
7
8
DM1
DP1
TC
9
10
11
ILIM DM2 DP2
19
NTC
18
VNTC
17
AGND
16
VCC
15
OLIM
14
ISET
13
TMR
12
PB
QFN-26 (4mmx4mm)
MP2632B Rev. 1.0
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3
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
PIN FUNCTIONS
P/N
Name
I/O
1
2
PGND
SW
Power
Power
3, 4
SYS
Power
5
VIN
Power
6
DM1
I
7
DP1
I
8
TC
O
9
ILIM
I
10
DM2
O
11
DP2
O
Description
Power ground.
Switch output node. Do not place vias on the SW plane during the PCB layout.
System output. Place a minimum 22µF ceramic capacitor as close to SYS and
PGND as possible. The total capacitance should not be lower than 44µF.
Adapter input. Place a bypass capacitor close to VIN to prevent large input voltage
spikes.
Negative pin of the input USB data line pair. DM1 together with DP1 implements
USB host/charging port detection automatically.
Positive pin of the input USB data line pair. DP1 together with DM1 implements
USB host/charging port detection automatically.
Torch-control output. TC is an open-drain structure. The internal driver MOSFET
is on when PB is pulled low for more than 1.5ms twice within one second.
Input current set. Connect ILIM to GND with an external resistor to program the
input current limit in charge mode.
Negative pin of the output USB data line pair. DM2 together with DP2 provides
the correct voltage signal for attached portable equipment to perform DCP detection
automatically.
Positive pin of the output USB data line pair. DP2 together with DM2 provides
the correct voltage signal for attached portable equipment to perform DCP detection
automatically.
Push button input. Connect a push button from PB to AGND. PB is pulled up by a
resistor internally. When PB is set from high to low for more than 1.5ms, the boost
is enabled and latched if VIN is not available.
LED1-4 are on for five seconds whenever PB is set from high to low for more than
1.5ms.
12
PB
I
13
TMR
I
14
ISET
I
15
OLIM
I
16
VCC
I
17
AGND
I/O
18
VNTC
O
19
NTC
I
20
VB
I
If PB is set from high to low for more than 1.5ms twice within one second and the
torch light is off, the torch light drive MOSFET is on and latched. However, if PB is
set from high to low for more than 1.5ms twice within one second and the torch
drive MOSFET is on, the torch light drive MOSFET turns off.
If PB is set from high to low for more than 2.5 seconds, this is defined as a long
push, and boost is shut down manually.
Oscillator period timer. Connect a timing capacitor between TMR and GND to set
the oscillator period. Short TMR to GND to disable the timer function.
Programmable charge current. Connect an external resistor to GND to program
the charge current.
Programmable output current limit for boost mode. Connect an external resistor
to GND to program the system current in boost mode.
Internal circuit power supply. Bypass VCC to GND with a ceramic capacitor no
higher than 100nF. VCC cannot carry an external load higher than 5mA.
Analog ground.
Pull-up voltage source for the NTC function. VNTC is connected to VCC through
an internal MOSFET. VNTC is disconnected from VCC during sleep mode. VNTC
should be the pull-up voltage of the external NTC resistive divider.
Negative temperature coefficient (NTC) thermistor.
Programmable battery regulation voltage. Leave VB floating for 4.2V. Connect
VB to logic high for 4.45V. Connect VB to GND for 4.35V.
MP2632B Rev. 1.0
www.MonolithicPower.com
3/9/2018
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© 2018 MPS. All Rights Reserved.
4
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
PIN FUNCTIONS (continued)
P/N
Name
I/O
Description
21
BATT
I
Positive battery terminal/battery charge current sense negative input.
22
CSP
I
23
LED4
O
24
LED3
O
25
LED2
O
26
LED1
O
Battery charge current sense positive input.
Fuel gauge indication. LED4 together with LED1,
the voltage-based fuel gauge indication.
Fuel gauge indication. LED3 together with LED1,
the voltage-based fuel gauge indication.
Fuel gauge indication. LED2 together with LED1,
the voltage-based fuel gauge indication.
Fuel gauge indication. LED1 together with LED2,
the voltage-based fuel gauge indication.
LED2, and LED3 implements
LED2, and LED4 implements
LED3, and LED4 implements
LED3, and LED4 implements
MP2632B Rev. 1.0
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3/9/2018
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5
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
ABSOLUTE MAXIMUM RATINGS (1)
Thermal Resistance
VIN to PGND ............................... -0.3V to +20V
SYS to PGND ............................. -0.3V to +6.5V
SW to PGND ........-0.3V (-2V for 20ns) to +6.5V
BATT to PGND ........................... -0.3V to +6.5V
All other pins to AGND ................ -0.3V to +6.5V
Continuous power dissipation (TA = +25°C) (2)
................................................................2.84W
Junction temperature ............................... 150°C
Lead temperature (solder) ....................... 260°C
Storage temperature ................ -65°C to +150°C
QFN-26 (4mmx4mm)..............44 ........ 9 .... °C/W
Recommended Operating Conditions (3)
Supply voltage (VIN) .................. 4.65V (4) to +6V
IIN .......................................................... up to 3A
ISYS ........................................................ up to 3A
ICC ......................................................... up to 3A
VBATT ................................................ up to 4.45V
Operating junction temp. (TJ) ... -40°C to +125°C
(5)
θJA
θJC
NOTES:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD (MAX) = (TJ
(MAX)-TA)/θJA. Exceeding the maximum allowable power
dissipation produces an excessive die temperature, causing
the regulator to go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) To charge a battery completely, VIN_MIN should satisfy VSYS
and be 450mV higher than the VBATT_REG threshold.
5) Measured on JESD51-7, 4-layer PCB.
MP2632B Rev. 1.0
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3/9/2018
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6
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
ELECTRICAL CHARACTERISTICS
VIN = 5.0V, RS1 = 10mΩ, TA = +25°C, unless otherwise noted.
Parameter
Min
Typ
Max
Units
VIN-to-SYS N-FET on resistance RVIN to SYS VCC = 5V
High-side P-FET on resistance
RH_DS
VCC = 5V
Low-side N-FET on resistance
RL_DS
VCC = 5V
CC charge mode/boost mode
High-side P-FET peak current
IPEAK_HS
limit
TC charge mode
47
18
18
5.7
1.9
55
26
26
7
2.3
62
31
31
9.0
3.0
mΩ
mΩ
mΩ
A
A
Low-side N-FET peak current
limit
IPEAK_LS
6.4
8.0
9.6
A
Fsw
500
1.96
600
2.16
100
800
2.36
kHz
V
mV
1.8
2.5
mA
380
740
2580
435
820
2840
490
900
3100
mA
400
450
500
mA
5.75
6.2
IIN_OCP
6.0
250
3.30
155
5
V
mV
V
mV
A
τINOCBLK
200
µs
τINRECVR
150
ms
Switching frequency
VCC UVLO
VCC UVLO hysteresis
Charge Mode
Input quiescent current
Symbol
VCC_UVLO
IIN
Input current limit for DCP
IIN_LIMIT
Input current limit for SDP
IUSB
Input over-voltage protection
VIN_OVP hysteresis
Input under-voltage lockout
VUVLO hysteresis
Input over-current threshold
Input over-current blanking time
(6)
Input over-current recover time
(6)
Condition
VIN_OVP
VIN_UVLO
Charge mode, ISYS = 0, battery
float
RlLIM = 88.7kΩ
RlLIM = 49.9kΩ
RlLIM = 14.7kΩ
SDP is detected using DP1/
DM1 detection
VIN rising
VIN falling
VIN falling
VIN rising
Connect VB to GND
Battery regulation (charge full)
voltage
Recharge threshold
Trickle charge voltage threshold
VBATT_REG Leave VB floating
Connect VB to VCC
Connect to VB to GND
VRECH
Leave VB floating
Connect VB to VCC
Connect VB to GND
VBATT_TC Leave VB floating
Connect VB to VCC
3.15
3.45
4.328
4.350
4.372
4.179
4.428
4.10
3.95
4.19
3.00
2.90
4.200
4.450
4.16
4.02
4.26
3.07
2.96
4.221
4.472
4.22
4.08
4.32
3.13
3.02
3.07
3.14
3.2
MP2632B Rev. 1.0
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3/9/2018
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© 2018 MPS. All Rights Reserved.
V
V
V
7
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
ELECTRICAL CHARACTERISTICS (continued)
VIN = 5.0V, RS1 = 10mΩ, TA = +25°C, unless otherwise noted.
Parameter
Symbol
Condition
Min
Typ
101.5
%
900
1800
2700
90
220
103.5
%
1000
2000
3000
280
105.5
%
1100
2200
3300
400
90
200
300
mA
4.55
4.65
4.75
V
5.0
5.1
5.2
V
5.6
5.8
6.0
V
Trickle charge hysteresis
Battery over-voltage threshold
Fast charge (CC) current
Trickle charge current
Termination charge current
Input voltage regulation
reference
Boost Mode
VBOVP
As a percentage of VBATT_REG
ICC
RS1 = 10mΩ, RISET = 150kΩ
RS1 = 10mΩ, RISET = 75kΩ
RS1 = 10mΩ, RISET = 49.9kΩ
ITC
ITERM
VREG
SYS voltage range
Boost SYS over-voltage
protection threshold
VSYS(OVP)
SYS over-voltage protection
threshold hysteresis
Boost quiescent current
Programmable boost output
current-limit accuracy
SYS over-current blanking time
(6)
SYS over-current recover time
(6)
System load to turn off boost
Light-load blanking time (6)
Weak battery latch threshold
RS1 = 10mΩ
ISYS = 100mA
Threshold over VSYS to turn off
the converter during boost
mode
VSYS falling from VSYS(OVP)
IQ_BOOST
IOLIM
ISYS = 0, boost mode, in test
mode with auto-off disabled
RS1 = 10mΩ, ROLIM = 150kΩ
RS1 = 10mΩ, ROLIM = 60.4kΩ
RS1 = 10mΩ, ROLIM = 49.9kΩ
Max
330
0.9
2.34
2.8
1.0
2.50
3.0
Units
mV
VBATT_
REG
mA
mA
mV
1.65
mA
1.1
2.66
3.2
A
τSYSOCBLK
150
µs
τSYSRECVR
1.5
ms
INOLOAD
Battery current in boost mode
50
2.76
VBATT_UVLO
During boost, VBATT falling
After charge, before boost
starts, in open loop, SYS =
5.2V, ramp up VBATT and push
PB
ILEAKAGE
VBATT = 4.2V, SYS float, VIN =
0V, not in boost mode
85
16
120
mA
s
2.98
V
3.295
V
Sleep Mode
Battery leakage current
13
MP2632B Rev. 1.0
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3/9/2018
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16
μA
8
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
ELECTRICAL CHARACTERISTICS (continued)
VIN = 5.0V, RS1 = 10mΩ, TA = +25°C, unless otherwise noted.
Parameter
Symbol
Condition
Min
Typ
Max
Units
Indication and Logic
LED1, LED2, LED3, and LED4
output low voltage
Sinking 5mA
200
mV
TC output low voltage
Sinking 100mA
550
mV
LED1, LED2, LED3, LED4, TC
leakage current
Connected to 5V
0.2
µA
INOVP, BOVP and NTC, fault
blinking frequency (6)
1
PB input logic low voltage
Hz
0.4
PB input logic high voltage
1.4
V
V
Protection
Trickle charge time
CTMR = 0.1µF, remains in TC
mode, ITC = 250mA
16
min
Total charge time
CTMR = 0.1µF, ICC = 1A
390
min
NTC low temp, rising threshold
RNTC = NCP18XH103 (0°C)
NTC low temp, rising threshold
hysteresis
65.2
%
66.2
%
67.2
%
2.4%
NTC high temp, rising
threshold
RNTC = NCP18XH103 (50°C)
NTC high temp, rising
threshold hysteresis
34.7
%
35.7
%
36.7
%
VSYS
2%
Charging current foldback
threshold (6)
Charge mode
Thermal shutdown threshold (6)
120
°C
150
°C
Input DP1/DM1 USB Detection
DP1 voltage source
VDP_SRC
0.5
Data connect detect current
source
IDP_SRC
7
DM1 sink current
IDM_SINK
50
Leakage current input
DP1/DM1
IDP_LKG
0.7
V
13
μA
150
μA
-1
1
mA
IDM_LKG
-1
1
mA
Data detect voltage
VDAT_REF
0.25
0.4
V
Logic low (logic threshold)
VLGC_LOW
0.8
V
DM pull-down resistor
0.6
100
19
kΩ
Logic I/O Characteristics
Low-logic voltage threshold
VL
High-logic voltage threshold
VH
0.4
1.3
MP2632B Rev. 1.0
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3/9/2018
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V
9
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
ELECTRICAL CHARACTERISTICS (continued)
VIN = 5.0V, RS1 = 10mΩ, TA = +25°C, unless otherwise noted.
Parameter
Symbol
Condition
Min
Typ
Max
Units
158
200
Ω
Output DP2/DM2 USB Signaling
BC1.2 DCP Mode
DP2 and DM2 short resistance
BC1.2 SDP Mode
VDP = 0.8V, IDM = 1mA
DP2 pull-down resistance
11
15
19
kΩ
DM2 pull-down resistance
Divider Mode
11
15
19
kΩ
2.6
2.6
26
2.7
2.7
31
2.8
2.8
36
V
V
kΩ
1.21
60
1.26
78
1.31
90
V
kΩ
3.52
3.60
3.69
V
DP2 output voltage
DM2 output voltage
DP2/DM2 output impedance
1.2V/1.2V Mode
VOUT = 5V
VOUT = 5V
DP2/DM2 output voltage
VOUT = 5V
DP2/DM2 output impedance
Voltage-Based Fuel Gauge (VOREG = 4.2V, Charge Mode)
First level of battery voltage
threshold
Hysteresis
Second level of battery voltage
threshold
Hysteresis
Third level of battery voltage
threshold
Hysteresis
Voltage-Based Fuel Gauge (VOREG = 4.2V, Discharge Mode)
First level of battery voltage
threshold
Hysteresis
Second level of battery voltage
threshold
Hysteresis
Third level of battery voltage
threshold
Hysteresis
Fourth level of battery voltage
threshold
Hysteresis
500
3.70
3.80
mV
3.91
500
3.92
4.00
mV
4.11
500
3.40
3.47
3.62
3.54
3.77
3.69
3.92
500
V
mV
3.84
500
3.85
V
mV
500
3.70
V
mV
500
3.55
V
V
mV
3.99
V
mV
NOTE:
6) Guaranteed by design.
MP2632B Rev. 1.0
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3/9/2018
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10
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
Fast Charge Efficiency
Constant-Voltage Charge Efficiency
VIN = 5V, VBATT_REG = 4.2V, ICC = 3A
VIN = 5V, VBATT_REG = 4.2V, ICC = 3A
100.00
95.00
95.00
90.00
Efficiency (%)
EFFICIENCY (%)
100.00
85.00
80.00
75.00
90.00
85.00
80.00
75.00
70.00
3
3.3
3.6
3.9
4.2
0
4.5
1
2
IBATT (A)
VBATT (V)
Boost Efficiency
3
4
ICC vs. RISET @ VIN = 5V
ROLIM = 0
3.50
100.00
3.00
ICHGCURRENT (A)
Efficiency (%)
95.00
90.00
85.00
80.00
VBATT=3V
VBATT=3.7V
VBATT=4.2V
75.00
2.50
2.00
1.50
1.00
0.50
0.00
70.00
0
1
2
30
3
70
110
ISYS (A)
150 190
RISET (kΩ)
230
270
310
Programmable Output Current Limit,
Boost Mode
ILIMIT vs. RILIMIT @ VIN = 5V
VBATT = 3.7V
3.50
OUTPUT CURRENT LIMIT (A)
3.00
ILIMIT CURRENT (A)
2.50
2.00
1.50
1.00
0.50
0.00
10
30
50
RILIMIT (kΩ)
70
90
3.00
2.50
2.00
1.50
1.00
0.50
0.00
40
80
120
ROLIM (kΩ)
MP2632B Rev. 1.0
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11
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
Ibatt_sleep_mode vs. Temperature
VIN_OVP_R vs. Temperature
VBATT = 4.2V
VBATT = 4.2V
6.2
6.1
40
VIN_OVP_R (V)
IBATT_SLEEP_MODE (uA)
50
30
20
5.9
5.8
5.7
10
5.6
0
5.5
-50
0
50
TEMPERATURE (°C)
100
-50
0
50
TEMPERATURE (°C)
100
SYS_OVP_R vs. Temperature
VBATT_VBL vs. Temperature
VBATT = 4.2V
VBATT = 4.35V
5.95
4.4
5.9
4.38
5.85
VBATT_VBL (V)
SYS_OVP_R (V)
6
5.8
5.75
5.7
5.65
5.6
4.36
4.34
4.32
4.3
4.28
5.55
4.26
5.5
-50
0
50
TEMPERATURE (°C)
-50
100
0
50
TEMPERATURE (°C)
100
VBATT_VBH vs. Temperature
VBATT_VBNC vs. Temperature
VBATT = 4.45V
VBATT = 4.2V
4.56
4.24
4.22
VBATT_VBNC (V)
VBATT_VBH (V)
4.52
4.48
4.44
4.4
4.36
4.32
4.2
4.18
4.16
4.14
4.12
4.28
-50
0
50
TEMPERATURE (°C)
100
4.1
-50
0
50
TEMPERATURE (°C)
MP2632B Rev. 1.0
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100
12
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
BATTOVP_VBL_R_% vs. Temperature
BATTOVP_VBH_% vs. Temperature
105.0
BATTOVP_VBH_% (%)
BATTOVP_VBL_R_% (%)
105.0
104.0
103.0
102.0
103.0
102.0
101.0
100.0
101.0
-50
0
50
TEMPERATURE (°C)
-50
100
0
50
TEMPERATURE (°C)
100
IOLIM_60.4kΩ vs. Temperature
BATTOVP_VBNC_% vs. Temperature
ROLIM = 60.4kΩ
2680.0
IOLIM_60.4kΩ (mA)
105
BATTOVP_VBNC_% (%)
104.0
104
103
102
2600.0
2520.0
2440.0
2360.0
2280.0
2200.0
101
-50
-50
0
50
TEMPERATURE (°C)
100
0
50
Temperature (°C)
100
ICC_75kΩ vs. Temperature
RISET = 75kΩ
2050.0
ICC (mA)
2010.0
1970.0
1930.0
1890.0
1850.0
-50
0
50
TEMPERATURE (°C)
100
MP2632B Rev. 1.0
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3/9/2018
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13
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
Battery Charge Curve
Auto-Recharge
VBATT_REG = 4.2V, ISYS = 0A, ICC = 3.0A
VBATT_REG = 4.2V, ISYS = 0A, ICC = 3.0A
CH1: VIN
1V/div.
CH2: VBATT
1V/div.
CH1: VIN
1V/div.
CH3: VSW
5V/div.
CH3: VSW
5V/div.
CH4: IBATT
1A/div.
CH2: VBATT
1V/div.
CH4: IBATT
1A/div.
4s/div.
2s/div.
FG Indication during Charging
BATT Float Steady State
VBATT_REG = 4.2V, ISYS = 0A, ICC = 3.0A
VBATT_REG = 4.2V, ISYS = 0A
CH1: VIN
1V/div.
CH2: VBATT
1V/div.
CH2: VBATT
2V/div.
CH1: LED1
5V/div.
CH2: LED2
5V/div.
CH3: VSW
1V/div.
CH3: LED3
5V/div.
CH4: IL
100mA/div.
CH4: LED4
5A/div.
2s/div.
40ms/div.
TC Charge Steady State
CC Charge Steady State
VBATT_REG = 4.2V, ISYS = 0A, VBATT = 2.6V
VBATT_REG = 4.2V, ISYS = 0A, VBATT = 3.7V
CH1: VIN
1V/div.
CH2: VBATT
1V/div.
CH1: VIN
1V/div.
CH2: VBATT
3V/div.
CH4: IL
CH4: IL
500mA/div.
1A/div.
CH3: VSW
5V/div.
CH3: VSW
5V/div.
1µs/div.
1µs/div.
MP2632B Rev. 1.0
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3/9/2018
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14
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
CV Charge Steady State
Power On, Charge Mode
VBATT_REG = 4.2V, ISYS = 0A, VBATT = 4.2V
VBATT_REG = 4.2V, ISYS = 0A, VBATT = 3.7V
CH1: VIN
1V/div.
CH2: VBATT
1V/div.
CH2: VBATT
1V/div.
CH1: VIN
2V/div
CH3: VSW
5V/div.
CH4: IL
500mA/div.
CH4: IL
CH3: VSW
5V/div.
1A/div.
1µs/div.
40ms/div.
Power Off, Charge Mode
Input Current Limit
VBATT_REG = 4.2V, ISYS = 0A, VBATT = 3.7V
VBATT_REG = 4.2V, VBATT = 3.7V, RILIM = 14.7kΩ
CH1: VIN
2V/div
CH1: VIN
1V/div
CH2: VBATT
1V/div.
CH2: IIN
2V/div.
CH3: VSW
5V/div.
CH3: ISYS
2V/div.
CH4: IL
CH4: IBATT
1A/div.
2A/div.
4ms/div.
10s/div.
Input Voltage Regulation
Input Over-Voltage Protection
VBATT_REG = 4.2V, VBATT = 3.7V, VIN_REG = 4.65V
VIN = 5 - 6V, VBATT = 3.7V
CH1: VIN
1V/div
CH2: VBATT
1V/div.
CH1: VIN
500mV/div
CH3: ISYS
500mA/div.
CH2: VBATT
2V/div.
CH4: IBATT
CH3: VSW
5V/div.
1A/div.
CH4: IBATT
2A/div.
4s/div.
4s/div.
MP2632B Rev. 1.0
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3/9/2018
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15
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
Input Over-Current Protection
NTC Protection, Charge Mode
VIN = 5V, ramp up ISYS to 4.2A, VBATT = 3.7V
VIN = 5V, VBATT = 2.6V
CH1: VIN
1V/div
CH2: LED4
5V/div.
CH2: VSYS
5V/div.
CH3: LED1
5V/div.
CH3: VSW
5V/div.
CH1: VNTC
1V/div
CH4: IIN
2A/div.
CH4: IBATT
200mA/div.
1s/div.
2s/div.
Timer Out Protection, Charge Mode
Input Adapter Insertion @ No Load
Connection
VIN = 5V, VBATT = 3.7V, CTMR = 150pF
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
CH1: VTMR
1V/div
CH1: VIN
2V/div
CH2: VBATT
1V/div.
CH2: DM1
1V/div.
CH3: VSW
5V/div.
CH3: DP1
1V/div.
CH4: IBATT
1A/div.
CH4: IBATT
2A/div.
40µs/div.
20ms/div.
Input Adapter Insertion @ Phone
Connected
Phone Connected @ Charging from
Adapter
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
CH1: VIN
2V/div
CH1: VIN
2V/div
CH2: VBATT
2V/div.
CH2: DM1
500mV/div.
CH3: VSYS
2V/div.
CH3: DP1
500mV/div.
CH4: IBATT
500mA/div.
CH4: IBATT
1A/div.
4ms/div.
4ms/div.
MP2632B Rev. 1.0
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3/9/2018
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16
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
USB Insertion @ No Load Connection
USB Insertion @ Phone Connection
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
CH1: VIN
2V/div
CH1: VIN
2V/div
CH2: DM1
1V/div.
CH2: DM1
500mV/div.
CH3: DP1
1V/div.
CH3: DP1
1V/div.
CH4: IBATT
500mA/div.
CH4: IBATT
500mA/div.
20ms/div.
20ms/div.
Phone Connected @ Charging from
USB
Phone Removed @ Charging from
Adapter
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
CH1: VIN
2V/div
CH2: VBATT
2V/div.
CH1: VIN
2V/div
CH2: VBATT
2V/div.
CH3: VSYS
2V/div.
CH4: IBATT
500mA/div..
CH3: VSYS
2V/div.
CH4: IBATT
500mA/div.
.
100ms/div.
100ms/div.
Phone Removed @ Charging from
USB
Input Adapter Removal @ Phone
Connected
IOUT = 3 - 6A, slew rate = 2.5A/µs by E-load
CH1: VIN
2V/div
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
CH1: VIN
2V/div
CH2: VBATT
2V/div.
CH2: DM1
500mV/div.
CH3: DP1
500mV/div.
CH3: VSYS
2V/div.
CH4: IBATT
500mA/div.
CH4: IBATT
1A/div.
100ms/div.
40ms/div.
MP2632B Rev. 1.0
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3/9/2018
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17
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
USB Removal @ Phone Connection
USB Removal @ No Load
Connection
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
VBATT = 3.7V, RILIMT = 14.7kΩ, RISET = 49.9kΩ
CH1: VIN
2V/div
CH1: VIN
2V/div
CH2: DM1
500mV/div.
CH2: DM1
1V/div.
CH3: DP1
500mV/div.
CH3: DP1
1V/div.
CH4: IBATT
1A/div.
CH4: IBATT
500mA/div.
40ms/div.
100ms/div.
Boost Mode Steady State
Power On by PB, Boost Mode
VBATT = 3.7V, ISYS = 3A
VBATT = 3.7V, ISYS = 0A
CH1: VBATT
2V/div
CH1: VBATT
2V/div
CH2: VSYS
1V/div.
CH3: Vsys
2V/div.
CH4: IL
500mA/div.
CH2: VPB
2V/div.
CH3: VSW
1V/div.
CH4: IL
1A/div.
20µs/div.
200ms/div.
Power Off by PB, Boost Mode
Load Transient
VBATT = 3.7V, ISYS = 0A
VBATT = 4.2V, ISYS = 0.5 - 2.5A
CH1: VBATT
1V/div
CH1: VBATT
2V/div
CH3: Vsys
500mV/div.
CH2: VPB
2V/div.
CH3: Vsys
2V/div.
CH2: VSW
5V/div.
CH4: IL
1A/div.
CH4: ISYS
2A/div.
1 s/div.
400µs/div.
MP2632B Rev. 1.0
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3/9/2018
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18
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
Power On by PB, Boost Mode
Power Off by PB, Boost Mode
VBATT = 3.7V, ISYS = 3A
VBATT = 3.7V, ISYS = 3A
CH1: VBATT
2V/div
CH1: VBATT
2V/div
CH3: Vsys
2V/div.
CH2: VPB
2V/div.
CH3: Vsys
2V/div.
CH2: VPB
2V/div.
CH4: IL
5A/div
CH4: IL
5A/div.
200ms/div.
1s/div.
SYS Output Current Limit, Boost
Mode
Light Load Off @ Torch Off
VBATT = 3.3V, IBATT = 65mA
VBATT = 3.7V, ROLIM = 60.4kΩ
CH1: VBATT
2V/div
CH1: VBATT
2V/div
CH2: VFB
1V/div.
CH2: VSYS
2V/div.
CH3: Vsys
5V/div.
CH4: IBATT
50mA/div
CH4: IL
1A/div
4s/div.
4s/div.
SYS Short-Circuit Entry
SYS Short Steady
VBATT = 3.7V, ISYS = 3A
VBATT = 3.7V, ISYS = 3A
CH1: VBATT
2V/div
CH1: VBATT
2V/div
CH3: Vsys
2V/div.
CH3: Vsys
2V/div.
CH2: VFB
5V/div.
CH2: VFB
5V/div.
CH4: IL
2A/div
CH4: IL
2A/div
2ms/div.
1ms/div.
MP2632B Rev. 1.0
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3/9/2018
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19
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
SYS Short-Circuit Recovery
LED Indication during Discharging
VBATT = 3.7V, ISYS = 3A
VBATT ramping down, ISYS = 3A
VBATT
2V/div
CH1: VBATT
2V/div
CH2: VSW
5V/div.
CH1: LED1
5V/div
CH2: LED2
5V/div.
CH3: Vsys
2V/div.
CH3: LED3
5V/div.
CH4: IL
2A/div
CH4: LED4
5A/div
2ms/div.
2s/div.
Torch Light
Input/Output Ripple
VBATT = 4.2V
IOUT = 6A
CH1: VBATT
2V/div
CH2: VSYS
2V/div.
CH3: VSYS
2V/div.
CH1: VPB
2V/div
CH3: VPB
2V/div.
CH2: VTC
2V/div.
CH4: VTC
2A/div
CH4: ISYS
50mA/div
400ms/div.
4s/div.
Boost Automatic On @ Phone
Insertion w/ BATT = 3.8V
NTC Protection, Boost Mode
VBATT = 3.7V, ISYS = 1A
VBATT = 3.8V, insert phone @ USB2
CH1: VSYS
2V/div
CH1: NTC
2V/div
CH2: VSYS
2V/div.
CH2: VSW
5V/div.
CH3: PB
2V/div.
CH3: VSYS
5V/div.
CH4: ISYS
500mA/div
CH4: ISYS
2A/div
1s/div.
200ms/div.
MP2632B Rev. 1.0
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3/9/2018
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20
MP2632B – ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, CIN = CBATT = CSYS = C2 = 22µF, L1 = 2.2µH, RS1 = 10mΩ, C4 = CTMR = 0.1µF, battery
simulator, unless otherwise noted.
BATT_UVLO Latch @ BATT = 3V
Power Off by Battery Removal,
Boost Mode
VBATT = 3.7V, ISYS = 0A
CH2: VSYS
2V/div.
CH1: VBATT
1V/div
CH1: VBATT
100mV/div
CH3: VSYS
2V/div.
CH3: VPB
2V/div.
CH2: VSW
2V/div.
CH4: IBATT
1A/div
CH4: IL
1A/div
10s/div.
100ms/div.
Auto-Restart after SYS OCP, Boost
Mode
Light Load Off Test
VBATT = 4.5V, IBATT = 55mA
VBATT = 3.3V, ROLIM = 100kΩ
CH1: VBATT
1V/div
CH1: VBATT
2V/div
CH2: VSW
2V/div.
CH2: VSYS
2V/div.
CH3: VSYS
2V/div.
CH4: IL
500mA/div
CH4: IL
1A/div
20ms/div.
4s/div.
Power Off by Battery Removal,
Boost Mode
VBATT = 3.7V, ISYS = 2.5A
CH1: VBATT
1V/div
CH3: VSYS
2V/div.
CH2: VSW
5V/div.
CH4: IL
2A/div
100ms/div.
MP2632B Rev. 1.0
www.MonolithicPower.com
3/9/2018
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© 2018 MPS. All Rights Reserved.
21
MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
BLOCK DIAGRAM
SYS
DM2
DP2
Output
Signaling
SW
VIN
Q1
DM1
Q3
VCC
A1
DP/DM
Detection
DP1
Q2
IIN_FB
VCC
LSMOS
Driver
LSMOS
Driver
Charge
Pump
ILIM
PWM
Controller
VNTC
A2
Input Current
Limit Setting
Q4
IIN_LMT
CSP
Sleep Mode
VCC
VCC
Current Sense
Buffer
VIN
VBATT_REG
GMV
ICC
VSYS
GMI
K1*ICC
VIN
BATT
K1*ICC
VBATT_FB
VBATT
Control Logic
&
Mode Selection
UV
OV
VBATT_FB
PGND
IIN_LMT
GMINI
IIN_FB
AGND
VIN_FB
VIN_LMT
VSYS
LED2
GMT
TJ
Boost Enable
LED3
Junction
Temp Sense
Torch Control
LED4
Thermal
Protection
H/L/Floating
LED1
TRef
VBATT+
300mV
PB
GMINV
FG
Indication
VCC
VB
ISET
Charge
Parameter
Setting
VBATT_REG
VNTC
ICC
Battery Temp
Protection
OLIM
Boost Output
Current Limit
Setting
Timer Fault
VBATT
TIMER
Function
VTNC
TMR
NTC
Figure 1: Functional Block Diagram in Charge Mode
MP2632B Rev. 1.0
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3/9/2018
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22
MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
BLOCK DIAGRAM (continued)
SYS
DM2
DP2
Output
Signaling
IOUT_FB
SW
VIN
Q1
DM1
Q2
Q3
VCC
A1
DP/DM
Detection
DP1
VCC
LSMOS
Driver
LSMOS
Driver
Charge
Pump
ILIM
PWM
Controller
VNTC
A2
Input Current
Limit Setting
Q4
IIN_LMT
CSP
Sleep Mode
VCC
VCC
Current Sense
VSYS_FB
VIN
Buffer
GMV
IOLIM
VSYS
GMI
IOUT_FB
VIN
BATT
K1*ICC
VSYS_REG
VBATT
VBATT_FB
Control Logic
&
Mode Selection
UV
OV
PGND
AGND
LED1
VSYS
TRef
VBATT+
300mV
Boost Enable
LED3
Junction
Temp Sense
Torch Control
PB
LED4
Thermal
Protection
H/L/Floating
LED2
GMT
TJ
FG
Indication
VCC
VB
ISET
VBATT_REG
Charge
Parameter
Setting
VNTC
ICC
Battery Temp
Protection
OLIM
Boost Output
Current Limit
Setting
Timer Fault
VBATT
TIMER
Function
VTNC
TMR
NTC
Figure 2: Functional Block Diagram in Boost Mode
MP2632B Rev. 1.0
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3/9/2018
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23
MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
OPERATION FLOW CHART
POR
No
V CC > VCC_ UVLO ?
Yes
4.65 V < VIN < 6.0 V ?
No
Yes
VIN > 6.0 V ?
SYS is Powered by VIN
No
No
No
Short Low Pulse at PB ?
USB Detection
Done ?
Input OVP
Fault
Yes
Yes
Yes
No
VBATT>2.9V ?
Input Current
Limit is Configured
Yes
Yes
Boost Mode
Any Charge Fault ?
No
No Load is
Detected
No
Yes
No
Charge Mode
No Load Timer
Expires?
Yes
Sleep Mode
Figure 3: Mode Selection Flow Chart
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
OPERATION FLOW CHART (continued)
Normal Operation
Charge Mode
Charge Mode?
VBATT = VBATT_REG
VBATT_TC < VBATT < VBATT_REG
VBATT < VBATT_TC
C.V.C
C.C.C
T.C.C
No
No
No
IBATT VBATT_TC ?
Yes
Yes
Yes
Charger “Off”
Yes
No
VBATT < VRECH ?
No
No
No
Timer Out ?
NTC Fault?
TJ ≥120oC?
Yes
Yes
Yes
Charge
Termination
Charge Suspend
Decrease ICHG to
Maintain TJ at 120oC
No
No
No
Reset
Timer?
NTC OK?
TJ ≥150oC?
Yes
Yes
Yes
Charge Recovery,
Return to Normal
Operation
Thermal Shutdown
No
Yes
TJ ≤120oC?
Fault Protection
Figure 4: Normal Operation and Fault Protection in Charge Mode
MP2632B Rev. 1.0
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
OPERATION FLOW CHART (continued)
Power Path Management
SYS Output
Current Increase
No
VIN touch the VIN_R?
No
Yes
IIN > IIN_LIMIT?
Yes
Reduce the IBATT
IBATT ≤0?
No
Yes
IIN > 7A?
No
YES
Normal Operation
IIN > IIN_OCP?
No
Yes
Regulate IIN at IIN_OCP
Fast Turn Off the
IN-to-SYS MOSFET
NO
TINOCBLK , 200μs
reaches?
YES
After One-Shot Delay
Turn Off IN-to-SYS
MOSFET
No
150ms Timer
Expires?
Yes
Softly Turn On the
IN-to-SYS MOSFET
Figure 5: Power-Path Management in Charge Mode
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
OPERATION FLOW CHART (continued)
BATT POR
Normal Boost
Operation
No
VBATT>3.2V?
VSYS3.5A?
Yes
No
Boost Enabled?
Yes
VSYS VBATT+ 300mV
Auto-recharge threshold
VBATT
0V
2V
VSYS
Band Gap
VINOK
CHG EN
REF SS
200μs
ICC
IBATT
ITERM
1ms
Charge Full
Figure 7: Input Power Start-Up Time Flow in Charge Mode
MP2632B Rev. 1.0
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
START-UP TIME FLOW IN BOOST MODE
Condition: VIN = 0V, VBATT = 3.8V
VSYS
VSYS > VCC + 150 mV
VCC
V BATT
0V
1.5ms
Band Gap
Boost EN
1.2ms
REF SS
IBATT
75mA
75mA
16s
No Load Off
Control
Figure 8: Boost Start-Up Time Flow in Boost Mode
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
OPERATION
The MP2632B is a highly integrated, flexible,
switch-mode battery charger with system
power-path management designed for singlecell Li-ion or Li-polymer batteries for use in a
wide range of applications. Depending on the
status of the input, the MP2632B can operate in
three different modes: charge mode, boost
mode, and sleep mode.
switching mode charging solution, resulting in
charging that is faster than a traditional linear
solution.
In charge mode, the MP2632B can work with a
single-cell Li-ion or Li-polymer battery. In boost
mode, the MP2632B boosts the battery voltage
to VSYS_SET to power higher voltage system rails.
In sleep mode, both charging and boost
operations are disabled, and the device enters
power-save mode to help reduce overall power
consumption. The MP2632B monitors VIN to
provide smooth transitions between different
modes of operation.
VCC Power Supply
The MP2632B has an external VCC power
supply. VCC is powered by the highest voltage
level out of VSYS, VBATT, and VIN - 0.7V. An
external capacitor is required to bypass VCC to
GND. When VCC is higher than 2.2V, the
internal control circuit is activated.
CHARGE MODE OPERATION
Charge Cycle (Trickle Charge CC Charge
CV Charge)
In charge mode, the MP2632B has five control
loops to regulate the input current, input voltage,
charge current, charge voltage, and device
junction temperature. The MP2632B charges
the battery in three phases: trickle current (TC),
constant current (CC), and constant voltage
(CV).
When charge operation is enabled, all five
loops are active, but only one dominates the IC
behavior. A typical battery charge profile is
shown in Figure 9a. The charger remains in TC
charge mode until the battery voltage reaches
the TC-to-CC threshold. Otherwise, the charger
enters CC charge mode. When the battery
voltage rises to the CV mode threshold, the
charger operates in constant-voltage mode.
Figure 9b shows a typical charge profile when
the input current limit loop dominates during CC
charge mode. In this case, the charger
maximizes the charging current due to the
Figure 9: Typical Battery Charge Profile
Auto-Recharge
Once the battery charge cycle is completed, the
charger remains off. During this time, the
system load may consume battery power, or
the battery may self-discharge. To ensure that
the battery does deplete, a new charge cycle
begins automatically when the battery voltage
falls below the auto-recharge threshold and the
input power is present. The timer resets when
the auto-recharge cycle begins.
During the off-state, after the battery is fully
charged, if the input power restarts, the charge
cycle begins and the timer resets, regardless of
the battery voltage.
Charge Current Setting
The external sense resistors (RS1 and RISET)
program the battery charge current (ICC).
Select RISET based on RS1 with Equation (1):
ICC( A )
1500
RISET (k) RS1(m)
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30
MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
Battery Over-Voltage Protection (OVP)
The MP2632B has battery over-voltage
protection (OVP). If the battery voltage exceeds
the battery over-voltage threshold (103.5% of
the battery regulation voltage), charging is
disabled. Under this condition, an internal 5kΩ
dummy load draws a current from BATT to
decrease the battery voltage and protect the
battery.
Timer Operation in Charge Mode
The MP2632B uses an internal timer to
terminate the charging. The timer remains
active during the charging process. An external
capacitor between TMR and GND programs the
charge cycle duration.
If charging remains in TC mode beyond the
trickle-charge time (τTRICKLE_TMR), charging is
terminated. For the MP2632B, the charge
current in TC mode is fixed at 265mA, and the
sense resistor (RS1) is set to 10mΩ. The length
of the trickle-charge period can be determined
with Equation (2):
TRICKLE _ TMR 17mins
CTMR (F)
0.1F
VCC
VNTC
Sleep mode
Charge
Control
NTC
(2)
The total charge time can be calculated with
Equation (3):
TOTAL _ TMR
VNTC Power Supply
The MP2632B has NTC protection in both
boost mode and charge mode. To enable NTC
protection in both boost mode and charge mode
and to minimize the battery leakage current in
sleep mode, the MP2632B uses a dedicated
power supply pin for the pull-up voltage for the
NTC protection function block (VNTC). In boost
mode and charge mode, VNTC is connected to
VCC by a switch internally. In sleep mode,
VNTC is disconnected from VCC to minimize
the battery leakage current (see Figure 10).
C (F)
1A
7.55Hours TMR
(3)
0.1F
ICHG (A) 0.1
Negative Temperature Coefficient (NTC)
Input for Battery Temperature Monitoring
The MP2632B has a built-in NTC resistance
window comparator that allows the MP2632B to
monitor the battery temperature via the batteryintegrated thermistor during both charge and
boost modes. Connect an appropriate resistor
from VNTC to the NTC pin and connect the
thermistor from the NTC pin to GND. The
resistor divider determines the NTC voltage
depending on the battery temperature. If the
NTC voltage falls outside of the NTC window,
the MP2632B stops charging. The charger
restarts if the temperature enters the NTC
window range again. Please refer to the
Application Information section on page 38 for
selecting an appropriate resistor.
Figure 10: NTC Protection Block
Input DP1/DM1 USB Detection and Input
Current Limit
Portable devices (PDs) are able to draw current
from the USB ports in personal computers to
charge their batteries. If the portable device is
attached to a USB host of the hub, then the
USB specification requires the portable device
to draw a limited current (usually 500mA).
When the device is attached to a charging port,
it is allowed to draw more than 1.5A.
The MP2632B features input source detection
to determine the input current limit according to
the input source (USB or adapter) (see Figure
11).
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
DP1
VDP_SRC
VLGC_HI
IDP_SRC
CHG_DET
VDAT_RE
During primary detection, the PD turns on
VDP_SRC on DP1 and IDM_SINK on DM1. If the
portable device is attached to a USB host, DM1
is low. If the power device is attached to CDP,
DCP, or another dedicated charging port, DM1
remains high.
To be compatible with different capacities of the
input source, set the input current limit
according to the values listed in Table 2.
F
IDM_SINK
Table 2: Input Current Limit Setting
DM1
RDM_DWN
Figure 11: USB Port Detection
The MP2632B starts DP1/DM1 detection when
the input source plugs in. DP1/DM1 detection
has two steps: data contact detection (DCD)
and primary detection.
DCD detection uses a current source to detect
when the data pins have made contact during
an attach event. The protocol for data contact
detection is as follows:
The power device (PD) detects if VIN is
asserted.
The PD turns on DP1 IDP_SRC and the DM1
pull-down resistor for 40ms.
The PD waits for DP1 to be low.
The PD turns off IDP_SRC and the DM1 pulldown resistor when DP1 is detected to be
low or when the 40ms timer expires.
DCD allows the PD to begin primary detection
once the data pins have made contact. Once
the data contact is detected, the MP2632B
jumps to the primary detection immediately. If
the data contact is not detected, the MP2632B
jumps to the primary detection automatically
after 300ms from the beginning of the DCD.
Primary detection is used to distinguish
between the USB host (or SDP) and different
types of charging ports.
DP1/DM1 Detection
Floating
SDP
CDP or DCP
IIN_LMT
500mA
500mA
Set through RILIM
USB detection runs once VIN is detected and is
independent of the charge enable status. After
the DP1/DM1 detection is done, the MP2632B
sets the input current limit as shown in Table 2.
When the detection algorithm is completed,
DP1 and DM1 enter Hi-Z with approximately
4pF of capacitive load.
External Input Current Limit Setting
The MP2632B has a dedicated pin (ILIM) used
to program the input current limit when CDP or
DCP is detected. The current at ILIM is a
fraction of the input current. The ILIM voltage
indicates the average input current of the
switching regulator as determined by the
resistor value between ILIM and GND. As the
input current approaches the programmed input
current limit, the charge current is reduced to
give priority to the system power. Determine the
input current-limit threshold with Equation (4):
IILIM
40(k)
(A)
RILIM (k)
(4)
Input Voltage Regulation in Charge Mode
In charge mode, if the input power source is not
sufficient enough to support both the charge
current and the system load current, the input
voltage decreases. As the input voltage
approaches the 4.65V input voltage regulation
threshold preset internally, the charge current is
reduced to give priority to the system power
and maintain proper regulation of the input
voltage.
MP2632B Rev. 1.0
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
Integrated Over-Current Protection (OCP)
and Over-Voltage Protection (OVP) for PassThrough Path
The MP2632B has an integrated VIN-to-SYS
pass-through path to allow for direct connection
of the input voltage to the system. Therefore,
The MP2632B monitors both the input current
and input voltage continuously. In the event of
an overload, the charge current is reduced to
ensure priority of the system power
requirements.
Additionally, the MP2632B also features input
over-current protection (OCP) and over-voltage
protection (OVP) for the VIN-to-SYS passthrough path.
Input Over-Current Protection (OCP)
If the total input current exceeds 5A, Q2 is
controlled linearly to regulate the current (see
Figure 12). If the current continues to exceed
5A after 200μs of blanking time, Q2 is turned off.
If the input current exceeds 7A, Q2 is turned off
almost instantaneously and without any
blanking time. This is done to protect both Q1
and Q2.
Input Over-Voltage Protection (OVP)
The MP2632B has a built-in over-voltage
threshold (VIN_OVP). When the input voltage is
higher than VIN_OVP, an invalid input power
source is detected by the MP2632B. At this
time, the VIN-to-SYS pass-through path is
disabled.
SYS
Q1
Q2
IN
Charge
Pump
Figure 12: Integrated Pass-Through Path
Battery-Short Protection
In charge mode, the MP2632B has two currentlimit thresholds. CC and CV modes have a
peak-current-limit threshold of 7A, while TC
mode has a current-limit threshold of 4A.
Therefore, the current-limit threshold decreases
to 4A when the battery voltage drops below the
TC threshold. The switching frequency also
decreases when the BATT voltage drops to
40% of the battery regulation voltage.
Thermal Foldback Function
The MP2632B implements thermal protection to
prevent thermal damage to the IC and the
surrounding components. An internal thermal
sense and feedback loop decrease the
programmed charge current automatically when
the die temperature reaches 120°C. This
function is called charge-current thermal
foldback. This function protects the device from
thermal damage and can also set the charge
current based on requirements rather than
worst-case conditions while ensuring safe
operation. Furthermore, the MP2632B includes
a thermal shutdown protection, where charging
stops if the junction temperature rises to 150°C.
Non-Sync Operation Mode
During charging mode, the MP2632B monitors
the total input current flowing from VIN to SYS
continuously. When the input current is lower
than 170mA, the low-side switch operates as a
non-synchronous MOSFET.
Constant-Off-Time Control for Large Duty
Charging Operation
The MP2632B has a built-in 600kHz frequency
oscillator for the switching frequency. Unlike a
fixed frequency in traditional peak-current
control, the MP2632B features a constant-offtime control to support the constant-current
charge, even when the input voltage is very
close to the battery voltage. The MP2632B
compares the high-side MOSFET sense current
with comp level continuously (see Figure 13). If
the sense current does not reach the comp
level within the original switching period, the
next clock is delayed until the sense current
reaches the comp level. As a result, the duty
cycle can be extended as long as possible.
Indication for Fault Flag in Charge Mode
The MP2632B is designed with distinct
indication separating the charging fault from the
normal operation. The charging fault includes
INOVP, BOVP, and NTC fault, the four LED
pins blink with 1Hz of frequency simultaneously
(see Table 3).
MP2632B Rev. 1.0
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
Table 3: Indication at Charge Mode
Operation Status
Normal charging
Charge full
VIN UVLO
VIN OVP, NTC fault, battery OVP
LED1 to LED4 State
Depending on the battery voltage, LEDx blinks at 1Hz,
(refer to Fuel Gauge Indication section on page 36)
LED1 to LED4 are all turned on
LED1 to LED4 are all turned off
LED1 to LED4 are all blinking at 1Hz
Comp
Slope Compensation
HS Sense Current
Constant Off Time
HS Signal
600kH
z
Lower the Fsw to support larger Duty
Figure 13: Constant-Off Time Operation Profile
BOOST MODE OPERATION
Low-Voltage Start-Up
The minimum battery voltage required to start
up the circuit in boost mode is 3.2V. Initially,
when VSYS is less than VBATT, the MP2632B
works in down mode. In down mode, the
synchronous P-channel MOSFET (P-FET)
stops switching, and its gate connects to VBATT
statically. The P-FET remains off for as long as
the voltage across the parasitic CDS (VSW) is
lower than VBATT. When the voltage across CDS
exceeds VBATT, the synchronous P-FET enters
linear mode, allowing the inductor current to
decrease and flow into SYS. Once VSYS
exceeds VBATT, the P-FET gate is released, and
normal, closed-loop, pulse-width modulation
(PWM) operation is initiated. In boost mode, the
battery voltage can drop to as low as 2.9V
without affecting circuit operation.
SYS Disconnect and Inrush Limiting
The MP2632B implements true output
disconnect
by eliminating
body diode
conduction of the internal P-FET rectifier. VSYS
can drop to 0V during shutdown, drawing no
current from the input source. The MP2632B
also allows for inrush current limiting at start-up,
minimizing surge currents from the input supply.
To optimize the benefits of the output
disconnect, avoid connecting an external
Schottky diode between SW and SYS.
Board layout is extremely critical for minimizing
voltage overshoot at SW due to stray
inductance. Keep the output filter capacitor as
close as possible to SYS and use very low
ESR/ESL ceramic capacitors tied to a good
ground plane.
Boost Output Voltage Setting
In boost mode, the MP2632B programs the
output voltage internally according to the load
connected to SYS (5.1V or 5.2V) and provides
built-in output OVP to protect the device and
other components against damage when VSYS
goes beyond 6V. Once output over-voltage
occurs, the MP2632B turns off the boost
converter. When the voltage on VSYS drops to a
normal level, the boost converter restarts again
when PB is set from high to low for more than
1.5ms.
Boost Output Current Limiting
The MP2632B integrates a programmable
output current limit function in boost mode. If
the boost output current exceeds this
programmable limit, the output current is limited
at this level. OLIM programs the current limit
threshold up to 3.0A as shown in Equation (5):
IOLIM (A)
1500
ROLIM (k) RS1(m)
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34
MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
The MP2632B can operate in CC mode when
the current limit is reached, and VIN does not
drop to the down mode threshold (VBATT +
100mV) (see Figure 14).
VSYS
VSYS_REG
Thermal Shutdown Protection
The thermal shutdown protection is also active
in boost mode. Once the junction temperature
rises higher than 150°C, the MP2632B enters
thermal shutdown. The MP2632B does not
resume normal operation until the junction
temperature drops below 120°C.
Automatic Off at Light Load
The boost turns off automatically if the load
current at BATT is below the typical 75mA
value for 16 seconds.
VBATT+100mV
SCP
IOLIM
ISYS
Figure 14: Boost Output U-I Curve
The MP2632B not only has CC mode during
the charging process, but also has CC mode
operation in boost mode for various applications.
SYS to BATT Block Protection
When there is no VIN and boost mode is not on,
the MP2632B is in sleep mode. The high-side
switch implements the body switch function,
which connects the body diode of the switch to
the high-voltage side of SW and SYS, which
blocks the external voltage on SYS from
flooding into the battery.
SYS Output Over-Current Protection (OCP)
The MP2632B integrates a three-phase output
OCP.
1. Phase one (boost mode output current limit):
When the output current exceeds the
programmed output current limit, the output
constant current loop controls the output
current, the output current remains at its
limit of IOLIM, and VSYS decreases.
2. Phase two (down mode): When VSYS drops
below VBATT + 100mV and the output current
loop remains in control, the boost converter
enters down mode and shuts down after
120μs of blanking time.
3. Phase three (short-circuit mode): When
VSYS drops below 4.0V (2V during boost soft
start), the boost converter shuts down
immediately once the inductor current
reaches the foldback peak-current limit of
the low-side N-channel MOSFET (N-FET).
The boost converter can also recover
automatically after a 1ms deglitch period.
The MP2632B also features a long-push action
on PB to shut down the boost manually. A low
push on PB longer than 2.5 seconds is defined
as a long push (see Figure 15 for PB action).
Automatic Output DP2/DM2 Signaling
The MP2632B sets the DP2/DM2 signal based
on the load applied on USB2 in boost mode. In
pass-through mode, DP2 and DM2 are set
according to DP1 and DM1 detection results.
In boost mode, DM2/DP2 are set based on
three types of signals: DM2/DP2 separately
biased with a 2.7V voltage signal (default),
DM2/DP2 shorted, and DM2/DP2 shorted with
a 1.2V bias.
In pass-through mode, DM2/DP2 are connected
together if the dedicated charger ports are
detected and pulled down to ground separately
with a 15kΩ resistor if SDP is identified.
Torch Control
If the internal torch drive MOSFET is off when
PB is pulled from high to low for more than
1.5ms twice within one second, the drive
MOSFET is turned on. Conversely, if the torch
drive MOSFET is on, the drive MOSFET is
turned off.
In MP2632B, torch light control is independent
from the automatic-off function in light load,
although it consumes battery current in boost
mode. The light-load automatic-off function is
still valid, even if the torch light is on.
If the torch light is on, the automatic off function
is still valid. If the MP2632B turns off the boost
automatically, the torch light remains on.
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
BATT_UVLO Latch
The MP2632B integrates a BATT_UVLO latch
function in boost mode. When the battery
voltage drops below 2.9V, the MP2632B stops
discharging and enters latch mode. The
MP2632B cannot begin boost discharging even
by pushing PB until the battery voltage is
charged to a given voltage (3.2V) by the input
power.
PB Control
The MP2632B has a push-button input pin (PB)
to control boost mode. Pull PB from high to low
for more than 1.5ms to enable boost mode. Pull
PB from high to low for 2.5s to disable boost
mode.
Automatic On during SYS Load Insertion
The MP2632B turns on the boost automatically
when PB is pulled from high to low for more
than 1.5ms. If a load is plugged into USB2, the
signal can be sent to PB to begin automatic on
operation.
To detect the USB load plug-in, an external R-C
network is connected to the shell of a USB
receptacle floating in the PCB. Once the USB
load is inserted, the USB receptacle shell is
grounded through the USB load. A narrow low
pulse (high to low for more than 1.5ms) is
generated at PB and wakes up the boost.
The R-C network can also be connected in the
VIN of the USB receptacle. During load
insertion, the load input capacitor generates a
high-to-low pulse for more than 1.5ms to start
the boost (see Figure 15). The circuit in the
dash frame is the automatic load detection
circuit. M2 is used to decouple the USB port
from the VSYS cap (C2, CSYS), and M1 is used to
drive M2.
M3 is used to cut off PB to and from the USB
port when boost is turned on. The PB state is
not affected by the spec of the inserted load of
the USB port. Choose M3 with a low turn-on
threshold (-0.7V is recommended), which can
ensure that it is fully on when the load is
inserted and its on resistance does not cause
too much of a voltage drop.
4-LED Driver for Voltage-Based Fuel Gauge
The MP2632B provides 4-LED drivers for a
voltage-based fuel gauge. The driver is
connected to an internal open-drain MOSFET.
The 4-LED indication values are shown in Table
4.
The LED threshold can be programmed using a
fuse. Each threshold can be adjusted from 150
- 200mV with 50mV steps from their default
value.
The LED threshold is also adjusted
automatically based on the VBATT_REG setting.
The VOREG difference is considered to be offset
for the LED thresholds.
During the voltage measurement, the battery
impedance (50mΩ) should be compensated
based on the battery current to get a precise
battery voltage for fuel gauge indication.
Indication for Fault Flag in Boost Mode
To minimize the power consumption of the
battery, the indication is active once PB is
short-pushed in normal discharge operation,
and turns off after five seconds automatically.
Table 4: Indication in Discharge Mode
Operation Status
Normal discharging
NTC fault
LED1 to LED4 State
Depending on the battery
voltage, LEDx is turned off
LED1 to LED4 are all
blinking at 1Hz
Once a phone is plugged in, the voltage at CUSB
is pulled down because the input capacitor
inside the phone is far larger than that in CUSB,
so the falling edge is delivered to PB to enable
the boost automatically.
MP2632B Rev. 1.0
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3/9/2018
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MP2632B – ALL-IN-ONE, 3A SW CHARGER, 3A BOOST
1.5ms
1.5ms
PB
2.5s
2.5s
TMR
2.5s
2.5s
2.5s
2.5s
Boost EN
Off
On
t0
(1st Push)
t1
(2nd Push)
Off
On
t2
(3rd Push)
t3
(4th Push)
Figure 15: PB Action Profile
Table 5: Indication during Normal Operation
Mode
Charging
VBATT
VBATT < 3.6V
[3.6V, 3.8V)
[3.8V, 4.0V)
CV mode, [4.0V, 4.2V),
not terminated
VBATT ≥ 4.0, terminated
Discharging
(All off after 5s)
VBATT ≥ 3.92V
[3.77V, 3.92V)
[3.62V, 3.77V)
[3.47V, 3.62V)
[VBAT_ULVO, 3.47V)
VBATT < VBAT_UVLO
SOC
75%
[50%, 75%)
[25%, 50%)
[5%, 25%)
[1%, 5%)
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