bq24150A
bq24151A
www.ti.com
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
Fully Integrated Switch-Mode One-Cell Li-Ion Charger
With Full USB Compliance and USB-OTG Support
Check for Samples: bq24150A, bq24151A
FEATURES
1
•
•
2
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Charge Faster than Linear Chargers
High-Accuracy Voltage and Current Regulation
– Input Current Regulation Accuracy: ±5%
(100 mA and 500 mA)
– Charge Voltage Regulation Accuracy:
±0.5% (25°C), ±1% (0°C to 125°C)
– Charge Current Regulation Accuracy: ±5%
High-Efficiency Mini-USB/AC Battery Charger
for Single-Cell Li-Ion and Li-Polymer Battery
Packs
20-V Absolute Maximum Input Voltage Rating
6-V Maximum Operating Input Voltage
Built-In Input Current Sensing and Limiting
Integrated Power FETs for Up To 1.25-A
Charge Rate
Programmable Charge Parameters through
I2C™ Interface (up to 3.4 Mbps):
– Input Current
– Fast-Charge/Termination Current
– Charge Voltage (3.5 V to 4.44 V)
– Safety Timer with Reset Control
– Termination Enable
Synchronous Fixed-Frequency PWM
Controller Operating at 3 MHz With 0% to
99.5% Duty Cycle
Robust Protection
– Reverse Leakage Protection Prevents
Battery Drainage
– Thermal Regulation and Protection
– Input/Output Overvoltage Protection
Status Output for Charging and Faults
Automatic High Impedance Mode for Low
Power Consumption
USB Friendly Boot-Up Sequence
Automatic Charging – bq24150A
Automatic High Impedance Mode – bq24151A
Boost Mode Operation for USB OTG:
– Input Voltage Range (from Battery): 2.5 V to
4.5 V
– Output for VBUS: 5.05 V/ 200 mA
2 x 2 mm 20-Pin WCSP Package
•
APPLICATIONS
•
•
•
Mobile and Smart Phones
MP3 Players
Handheld Devices
DESCRIPTION
The bq24150A/1A is a compact, flexible,
high-efficiency, USB-friendly switch-mode charge
management device for single-cell Li-ion and
Li-polymer batteries used in a wide range of portable
applications. The charge parameters can be
programmed through an I2C interface. The
bq24150A/1A integrates a synchronous PWM
controller, power MOSFETs, input current sensing,
high-accuracy current and voltage regulation, and
charge termination, into a small WCSP package.
The bq24150A/1A charges the battery in three
phases: conditioning, constant current and constant
voltage. The input current is automatically limited to
the value set by the host. Charge is terminated based
on user-selectable minimum current level. A safety
timer with reset control provides a safety backup for
I2C interface. During normal operation, bq24150A/1A
automatically restarts the charge cycle if the battery
voltage falls below an internal threshold and
automatically enters sleep mode or high impedance
mode when the input supply is removed. The charge
status is reported to the host using the I2C interface.
TYPICAL APPLICATION CIRCUIT
LO 1.0 mH
VBUS
C IN
VBUS
U1
bq24150A/1A
1 mF
PMID
10 kW
10 kW
PGND
4.7 mF
CSIN
10 kW
SCL
SDA
STAT
OTG
10 kW
HOST
I2C BUS
SCL
SDA
STAT
OTG
CO
1 0mF
C BOOT
10nF
PACK +
BOOT
C IN
VAUX
R SNS
SW
0.1 mF
PACK -
CSOUT
AUXPWR
VREF
+
C AUXPWR
C VREF
1mF
1mF
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
I2C is a trademark of Philips Electronics.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2009–2010, Texas Instruments Incorporated
bq24150A
bq24151A
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
DESCRIPTION CONTINUED
During the charging process, the bq24150A/1A monitors its junction temperature (TJ) and reduces the charge
current once TJ increases to approximately 125°C. To support USB OTG device, bq24150A/1A provides VBUS
(approximately 5.05 V) by boosting the battery voltage. The bq24150A/1A is available in 20-pin WCSP package.
WCSP PACKAGE
(Top View)
A1
A2
A3
A4
VBUS
VBUS
BOOT
SCL
B3
B4
PMID
B1
PMID
B2
PMID
SDA
C1
C2
C3
C4
SW
SW
SW
STAT
D1
D2
D3
D4
PGND
PGND
PGND
OTG
E1
E2
E3
E4
CSIN
AUX
PWR
VREF
CSOUT
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME
NO.
CSOUT
E4
I
Battery voltage and current sense input. Bypass it with a ceramic capacitor (minimum 0.1 mF) to
PGND if there are long inductive leads to battery.
VBUS
A1, A2
I
Charger input voltage. Bypass it with a 1-mF ceramic capacitor from VBUS to PGND.
PMID
B1, B2, B3
O
Connection point between reverse blocking MOSFET and high-side switching MOSFET. Bypass it
with a minimum of 3.3-mF capacitor from PMID to PGND.
SW
C1, C2, C3
O
Internal switch to output inductor connection.
O
Boot-strapped capacitor for the high-side MOSFET gate driver. Connect a 10-nF ceramic capacitor
(voltage rating above 10 V) from BOOT pin to SW pin.
BOOT
A3
PGND
D1, D2, D3
CSIN
E1
I
Charge current-sense input. Battery current is sensed via the voltage drop across an external sense
resistor. A 0.1-mF ceramic capacitor to PGND is required.
SCL
A4
I
I2C interface clock. Open drain output, connect a 10-kΩ pullup resistor to 1.8V rail
SDA
B4
I/O
I2C interface data. Open drain output, connect a 10-kΩ pullup resistor to 1.8V rail
STAT
C4
O
Charge status pin. Pull low when charge in progress. Open drain for other conditions. During faults, a
128-mS pulse is sent out. STAT pin can be disabled by the EN_STAT bit in control register. STAT can
be used to drive a LED or communicate with a host processor.
VREF
E3
O
Internal bias regulator voltage. Connect a 1-mF ceramic capacitor from this output to PGND. External
load on VREF is not allowed.
AUXPWR
E2
I
Auxiliary power supply, connected to the battery pack to provide power in high-impedance mode.
Bypass it with a 1-mF ceramic capacitor from this pin to PGND.
I
Boost mode enable control or input current limiting selection pin. When OTG is in active status,
bq24150A/1A is forced to operate in boost mode. It has higher priority over I2C control and can be
disabled through control register. The logic voltage level at OTG active status can also be controlled.
At POR, the OTG pin is default to be used as the input current limiting selection pin. When OTG =
High, Iin – limit = 500mA and when OTG = Low, Iin – limit = 100mA, see the Control Register for
details.
OTG
2
Power ground
D4
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Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24150A bq24151A
bq24150A
bq24151A
www.ti.com
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
PACKAGE DIMENSIONS
PACKAGE DEVICES
bq24150A, bq24151A
D
E
1.976 ± 0.05mm
1.946 ± 0.05mm
ORDERING INFORMATION (1)
PART NO.
MARKING
MEDIUM
QUANTITY
AUTOMATIC CHARGING
(VBUS Recycled, VBAT < VLOWV,
32 Minutes Mode)
PART NUMBER BIT PN0,
CONTROL REGISTER 03H, BIT 3
bq24150AYFFR
bq24150A
Tape and Reel
3000
Yes
1
bq24150AYFFT
bq24150A
Tape and Reel
250
Yes
1
bq24151AYFFR
bq24151A
Tape and Reel
3000
No
0
bq24151AYFFT
bq24151A
Tape and Reel
250
No
0
(1)
For the most current package information, see the Package Option Addendum at the end of this document, or see the TI website at
www.ti.com.
DISSIPATION RATINGS (1)
PACKAGE
WSCP-20
(1)
(2)
(1)
RqJA
RqJC
TA ≤ 25°C
POWER RATING
DERATING FACTOR
TA > 25°C
185°C/W (2)
1.57°C/W
0.54 W
0.0054 W/°C
Maximum power dissipation is a function of TJ(max), RqJA and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = [TJ(max)-TA] / RqJA.
For PCB board with only top trace layer. For PCB board with four layers (top trace layer, buried ground layer, buried signal layer and
bottom layer), RqJA drops to 75.96°C/W
ABSOLUTE MAXIMUM RATINGS (1)
(2)
over operating free-air temperature range (unless otherwise noted)
VALUE
VSS
Supply voltage range (with respect to PGND)
VBUS
VI
Input voltage range (with respect to and PGND)
SCL, SDA, OTG, CSIN, CSOUT, AUXPWR
–0.3 to 7
V
PMID, STAT
–0.3 to 20
V
VO
Output voltage range (with respect to and PGND)
VREF
6.5
V
–0.7 to 20
V
SW, BOOT
–0.3 to 20
UNIT
(3)
V
Voltage difference between CSIN and CSOUT inputs (V(CSIN) – V(CSOUT) )
±7
V
Output sink
STAT
10
mA
IO
Output Current (average)
SW
1.25
A
TA
Operating free-air temperature range
–40 to 85
°C
TJ
Junction temperature
–40 to 150
°C
Tstg
Storage temperature
–65 to 150
°C
(1)
(2)
(3)
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage
values are with respect to the network ground terminal unless otherwise noted.
All voltages are with respect to GND if not specified. Currents are positive into, negative out of the specified terminal.
The bq24150A/1A family can withstand up to 10.6 V continuously and 20 V for a minimum of 432 hours.
Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24150A bq24151A
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bq24150A
bq24151A
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
www.ti.com
RECOMMENDED OPERATING CONDITIONS
MIN
NOM
MAX
UNIT
VBUS
Supply voltage, VBUS
4
6 (1)
V
TJ
Operating junction temperature range
0
+125
°C
(1)
The inherent switching noise voltage spikes should not exceed the absolute maximum rating on either the BOOST or SW pins. A tight
layout minimizes switching noise.
ELECTRICAL CHARACTERISTICS
Circuit of Figure 1, VBUS = 5 V, HZ_MODE = 0, OPA_MODE = 0 (charger mode operation), TJ = 0°C to 125°C, TJ = 25°C for
typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT CURRENTS
VBUS > VBUS(min), PWM switching
10
VBUS > VBUS(min), PWM NOT switching
I(VBUS)
0°C < TJ < 85°C, VBUS = 5 V, HZ_MODE = 1,
V(AUXPWR) > V(LOWV), SCL, SDA, OTG = 0 V or 1.8 V
20
mA
0°C < TJ < 85°C, VBUS = 5 V, HZ_MODE = 1,
V(AUXPWR) < V(LOWV), 32S mode, SCL, SDA, OTG = 0
V or 1.8 V
35
mA
Leakage current from battery to VBUS pin
0°C < TJ < 85°C, V(AUXPWR) = 4.2 V, High Impedance
mode
5
mA
Battery discharge current in High Impedance
mode, (CSIN, CSOUT, AUXPWR, SW pins)
0°C < TJ < 85°C, V(AUXPWR) = 4.2 V, High Impedance
mode, SCL, SDA, OTG = 0 V or 1.8 V
20
mA
V
VBUS supply current control
Ilkg
mA
5
VOLTAGE REGULATION
V(OREG)
Output charge voltage
Operating in voltage regulation, programmable
TA = 25°C
Voltage regulation accuracy
3.5
4.44
–0.5%
0.5%
–1%
1%
CURRENT REGULATION (FAST CHARGE)
IO(CHARGE)
V(LOWV) ≤ V(AUXPWR) < V(OREG),
VBUS > V(SLP), R(SNS) = 68 mΩ, Programmable
Output charge current
Regulation accuracy for charge current across
R(SNS)
V(IREG) = IO(CHARGE) × R(SNS)
550
1250
20 mV ≤ V(IREG) ≤ 40 mV
–5%
5%
40 mV < V(IREG)
–3%
3%
mA
WEAK BATTERY DETECTION
V(LOWV)
Weak battery voltage threshold
Programmable
Weak battery voltage accuracy
Hysteresis for V(LOWV)
Battery voltage falling
Deglitch time for weak battery threshold
Rising voltage, 2-mV over drive, tRISE = 100 ns
3.4
3.7
–5%
5%
V
100
mV
30
ms
OTG PIN LOGIC LEVEL
VIL
Input low threshold level
VIH
Input high threshold level
0.4
1.3
V
V
CHARGE TERMINATION DETECTION
I(TERM)
Termination charge current
V(AUXPWR) > V(OREG) – V(RCH),
VBUS > V(SLP), R(SNS) = 68 mΩ, Programmable
Deglitch time for charge termination
Both rising and falling, 2-mV overdrive,
tRISE, tFALL = 100 ns
Voltage regulation accuracy for termination
current across R(SNS)
V(IREG_TERM) = IO(TERM) × R(SNS)
50
400
30
mA
ms
3 mV ≤ V(IREG_TERM) < 5 mV
–25%
25%
5 mV ≤ V(IREG_TERM) < 20 mV
–10%
10%
20 mV ≤ V(IREG_TERM) ≤ 40 mV
–5%
5%
INPUT POWER SOURCE DETECTION
Input voltage lower limit
Input power source detection, Input voltage falling
VIN(min)
Deglitch time for VBUS rising above VIN(min)
Rising voltage, 2-mV overdrive, tRISE = 100 ns
Hysteresis for VIN(min)
Input voltage rising
tINT
Detection Interval
Input power source detection
4
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3.6
3.8
4
30
100
200
2
V
ms
mV
S
Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24150A bq24151A
bq24150A
bq24151A
www.ti.com
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
ELECTRICAL CHARACTERISTICS (continued)
Circuit of Figure 1, VBUS = 5 V, HZ_MODE = 0, OPA_MODE = 0 (charger mode operation), TJ = 0°C to 125°C, TJ = 25°C for
typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT CURRENT LIMITING
IIN
USB charge
mode
Input current limiting threshold
IIN = 100 mA
88
93
98
IIN = 500 mA
450
475
500
mA
VREF BIAS REGULATOR
VREF
VBUS >VIN(min) or V(AUXPWR) > V(BAT)min,
I(VREF) = 1 mA, C(VREF) = 1 mF
Internal bias regulator voltage
2
VREF output short current limit
6.5
30
V
mA
BATTERY RECHARGE THRESHOLD
V(RCH)
Recharge threshold voltage
Below V(OREG)
Deglitch time
V(AUXPWR) decreasing below threshold,
tFALL = 100 ns, 10-mV overdrive
Low-level output saturation voltage, STAT
IO = 10 mA, sink current
High-level leakage current for STAT
Voltage on STAT pin is 5 V
100
120
150
130
mV
ms
STAT OUTPUTS
VOL(STAT)
0.4
V
1
mA
0.4
V
0.4
V
1
mA
I2C BUS LOGIC LEVELS AND TIMING CHARACTERISTICS
VOL
Output low threshold level
VIL
Input low threshold level
VIH
Input high threshold level
I(BIAS)
Input bias current
f(SCL)
SCL clock frequency
IO = 10 mA, sink current
1.2
V
V(pull-up) = 1.8 V, SDA and SCL
3.4
MHz
BATTERY DETECTION
I(DETECT)
Battery detection current before charge done
(sink current) (1)
Begins after termination detected,
V(AUXPWR) ≤ V(OREG)
Battery detection time
–0.45
mA
262
ms
SLEEP COMPARATOR
V(SLP)
V(SLP_EXIT)
Sleep-mode entry threshold,
VBUS - VAUXPWR
2.3 V ≤ V(AUXPWR) ≤ V(OREG), VBUS falling
Sleep-mode exit hysteresis
2.3 V ≤ V(AUXPWR) ≤ V(OREG)
Deglitch time for VBUS rising above V(SLP) +
V(SLP_EXIT)
Rising voltage, 2-mV overdrive, tRISE = 100 ns
0
40
100
mV
40
100
160
mV
30
ms
UNDERVOLTAGE LOCKOUT
UVLO
IC active threshold voltage
VBUS rising
3.05
3.3
UVLO(HYS)
IC active hysteresis
VBUS falling from above UVLO
120
150
3.55
Voltage from BOOT pin to SW pin
During charge or boost operation
Internal top reverse blocking MOSFET
on-resistance
IIN(LIMIT) = 500 mA, Measured from VBUS to PMID
180
250
Internal top N-channel Switching MOSFET
on-resistance
Measured from PMID to SW, VBOOT - VSW= 4V
120
250
Internal bottom N-channel MOSFET
on-resistance
Measured from SW to PGND
110
200
V
mV
PWM
f(OSC)
6.5
Oscillator frequency
3
Frequency accuracy
D(MAX)
Maximum duty cycle
D(MIN)
Minimum duty cycle
–10%
mΩ
MHz
10%
99.5%
0
Synchronous mode to non-synchronous mode
transition current threshold (2)
(1)
(2)
V
Low side MOSFET cycle by cycle current sensing
100
mA
Negative charge current means the charge current flows from the battery to charger (discharging battery).
Bottom N-channel MOSFET always turns on for Ⅹ60 ns and then turns off if current is too low.
Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24150A bq24151A
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bq24150A
bq24151A
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
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ELECTRICAL CHARACTERISTICS (continued)
Circuit of Figure 1, VBUS = 5 V, HZ_MODE = 0, OPA_MODE = 0 (charger mode operation), TJ = 0°C to 125°C, TJ = 25°C for
typical values (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
6.3
6.5
6.7
UNIT
CHARGE MODE PROTECTION
V(OVP-IN)
V(OVP)
I(LIMIT)
V(SHORT)
I(SHORT)
Input VBUS OVP threshold voltage
Threshold over VBUS to turn off converter during
charge
V(OVP_IN) hysteresis
VBUS falling from above V(OVP_IN)
Output OVP threshold voltage
V(CSOUT) threshold over V(OREG) to turn off charger
during charge
140
110
117
mV
121
V(OVP) hysteresis
Lower limit for V(CSOUT) falling from above V(OVP)
Charge mode operation
1.5
2.3
11
3
Short-circuit voltage threshold
V(AUXPWR) falling
1.9
2
2.1
V(SHORT) hysteresis
V(AUXPWR) rising from below V(SHORT)
Short-circuit current
V(AUXPWR) ≤ V(SHORT)
100
10
%V
(OREG)
Cycle-by-cycle current limit for charge
5
V
A
V
mV
15
mA
BOOST MODE OPERATION FOR VBUS (OPA_MODE = 1, HZ_MODE = 0)
V(BUS_B)
Boost output voltage (to VBUS pin)
2.5V < V(AUXPWR) < 4.5 V, Open loop
Boost output voltage accuracy
Including line and load regulation
I(BO)
Maximum output current for boost
V(BUS_B) = 5.05 V, 2.5 V < V(AUXPWR) < 4.5 V
I(BLIMIT)
Cycle by cycle current limit for boost
V(BUS_B) = 5.05 V, 2.5 V < V(AUXPWR) < 4.5 V
VBUS(OVP)
Overvoltage protection threshold for boost
(VBUS pin)
Threshold over VBUS to turn off converter during
boost
VBUS(OVP) hysteresis
VBUS falling from above VBUS(OVP)
Maximum battery voltage for boost (CSOUT
pin)
V(CSOUT) rising edge during boost
V(BAT)MAX hysteresis
V(CSOUT) falling from above VBATMAX
200
Minimum battery voltage for boost (AUXPWR
pin)
During boosting
2.5
Before boost starts
2.9
V(BAT)MAX
V(BAT)MIN
Output resistance at high-impedance mode
(From VBUS to PGND)
5.05
–3%
V
3%
200
mA
1
5.8
6
A
6.2
125
4.75
HZ_MODE = 1
4.9
165
V
mV
5.05
V
mV
V
3.05
V
kΩ
PROTECTION
T(SHTDWN)
Thermal trip
165
Thermal hysteresis
10
T(CF)
Thermal regulation threshold (3)
Charge current begins to reduce
T(32S)
Time constant for the 32 second timer
32 Second mode
(3)
6
°C
120
12
32
s
Verified by design
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Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24150A bq24151A
bq24150A
bq24151A
www.ti.com
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
TYPICAL APPLICATION CIRCUITS
VBUS = 5 V, I(CHARGE) = 1250 mA, VBAT = 3.5 V to 4.44 V (adjustable), Safety Timer = 32 minutes or 32
seconds.
V BUS
VBUS
C IN
R SNS
C BOOT
68 mW
SW
U1
bq24150A/1A
1 mF
LO 1.0 mH
V BAT
CO
10 mF
10 nF
C IN 4.7 mF
PACK +
BOOT
PMID
CCSIN
PGND
VAUX
+
0.1 mF
CSIN
10 kW
10 kW 10 kW 10 kW
I
2C BUS
SDA
STAT
OTG
PACK -
CSOUT
SCL
SCL
SDA
STAT
AUXPWR
CAUXPWR
VREF
OTG
C VREF
1 mF
10 kW
1 mF
HOST
Figure 1. I2C Controlled 1-Cell Charger Application Circuit
VBUS = 5 V, I(IN_LIMIT) = 500 mA, VOUT = 3.5 V to 4.44V (adjustable), Safety Timer = 32 minutes or 32 seconds.
LO 1.0 mH
VBUS
VBUS
CIN
CIN 4.7 mF
PMID
SCL
SDA
STAT
2
10 kW 10 kW 10 kW I C BUS
OTG
68 mW
CBOOT
10 kW
CO
10 mF
HostControlled
Switch
Q
BOOT
CCSIN 0.1 mF
Host
Charge
Controller
CSIN
SCL
SDA
STAT
OTG
V OUT
10nF
PGND
VAUX
10 kW
SW
U1
Bq24150A/1A
1 mF
RSNS
CSOUT
AUXPWR
VREF
CAUXPWR
C VREF
1 mF
CCSOUT
0.1 mF
VSYS
PACK +
+
PACK -
1 mF
HOST
Figure 2. I2C Controlled 1-Cell Pre-Regulator Application
Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24150A bq24151A
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TYPICAL CHARACTERISTICS
Using circuit shown in Figure 1, TA = 25°C, unless otherwise specified.
ADAPTER INSERTION
BATTERY INSERTION/REMOVAL
VBAT
2 V/div
VBUS
2 V/div
Vbus =5 V, Iin_limit = 500 mA,
32S Mode
VSW
5 V/div
VSW
5 V/div
Vbus = 0–5 V, Vbat = 3.5 V Charge mode
IBAT
0.5 A/div
IBAT
0.5 A/div
1S/div
500 mS/div
Figure 3.
Figure 4.
PWM CHARGING WAVEFORMS
POOR SOURCE DETECTION
VBUS
2 V/div
VSW
2 V/div
VSW
5 V/div
IL
0.5 A/div
Vbus = 5 V, Vbat = 2.6 V, Voreg = 4.2 V, Ichg = 1250 mA
Vbus = 5 V @ 10 mA, Iin_limit = 100 mA,
Vbat = 3.2 V, Ichg = 550 mA
IBUS
0.1 A/div
2 mS/div
100 nS/div
Figure 5.
Figure 6.
BATTERY DETECTION AT POWER UP
CYCLE BY CYCLE CURRENT LIMIT IN CHARGE MODE
VBUS
5 V/div
VIN = 0-5 V, No Battery,
COUT = 100 mF, RLOAD = 5 kW
VSW
2 V/div
VBAT
1 V/div
IL
0.5 A/div
OTG
5 V/div
Vbus = 5 V, Vbat = 3.6 V Charge mode
operation
IBAT
50 mA/div
2 mS/div
500 mS/div
Figure 7.
8
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Figure 8.
Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24150A bq24151A
bq24150A
bq24151A
www.ti.com
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
TYPICAL CHARACTERISTICS (continued)
INPUT CURRENT CONTROL
CHARGER EFFICIENCY
92
Vbus = 5 V, Iin_limit = 100/500 mA,
(OTG Control, 32 Minute Mode),
VBUS = 5 V
Vbat = 4 V
2
Iin_limit = 100 mA (I C Control, 32 Second Mode)
90
Vbat = 3.6 V
OTG
5 V/div
32 Minute
Mode
32 Second
Mode
IBUS
0.2 A/div
Efficiency - %
88
86
84
Vbat = 3 V
82
0.5 S/div
80
0
100 200 300 400 500 600 700 800 900 10001100 1200 1300
Charge Current - mA
Figure 9.
Figure 10.
BOOST WAVEFORM (PWM MODE)
BOOST WAVEFORM (PFM MODE)
VBUS 100 mV/div, 5.06 V Offset
VBUS 10 mV/div, 5.08 V Offset
VBAT 10 mV/div, 3.52 V Offset
VBAT 100 mV/div, 3.5 V Offset
VSW
2 V/div
VSW
2 V/div
IL
0.2 A/div
IL
0.2 A/div
VBAT = 3.5 V, VBUS = 5.06 V, IBUS = 42 mA
VBAT = 3.5 V, VBUS = 5.07 V, IBUS = 215 mA
5 mS/div
100 nS/div
Figure 11.
Figure 12.
VBUS OVERLOAD WAVEFORMS (BOOST MODE)
VBUS
2 V/div
VBAT = 3.5 V, VBUS = 5.05 V, IBUS = 42 mA
LOAD STEP UP RESPONSE (BOOST MODE)
VBUS
100 mV/div,
5.06 V Offset
VBAT = 3.85 V, VBUS = 5.07 V, IBUS = 0-215 mA
VPMID
200 mV/div,
5.02 V Offset
VBAT
0.2 V/div,
3.8 V Offset
VSW
5 V/div
VSW
5 V/div
IBUS
0.2 A/div
IBAT
0.1 A/div
5 mS/div
100 mS/div
Figure 13.
Figure 14.
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TYPICAL CHARACTERISTICS (continued)
LOAD STEP DOWN RESPONSE (BOOST MODE)
CYCLE BY CYCLE CURRENT LIMITING IN BOOST MODE
VBUS
100 mV/div,
5.06 V Offset
VBAT
0.2 A/div,
3.8 V Offset
Vbat = 3.6 V, Vbus = 4.11 V, Boost mode
overload operation
VBAT = 3.85 V, VBUS = 5.07 V, IBUS = 215 mA-0
VSW
2 V/div
VSW
5 V/div
IL
0.5 A/div
IBAT
0.1 A/div
100 mS/div
200 nS/div
Figure 15.
Figure 16.
BOOST TO CHARGE MODE TRANSITION (OTG CONTROL)
BOOST EFFICIENCY
95
VBUS
0.5 V/div,
4.5 V Offset
VBAT = 4 V
VBAT = 3.6 V
90
OTG
2 V/div
Efficiency - %
Vbus = 4.5 V, (Charge Mode)/5.1 V (Boost Mode),
Iin_limit = 500 mA, Vbat = 3.4 V, 32S Mode.
VSW
5 V/div
IL
0.5 A/div
85
VBAT = 2.5 V
80
75
0.5 mS/div
70
50
0
100
150
200
Load Current at VBUS - mA
Figure 17.
Figure 18.
LINE REGULATION FOR BOOST
LOAD REGULATION FOR BOOST
5.1
5.1
IBUS = 100 mA
5.09
5.09
IBUS = 200 mA
5.08
5.08
VBAT = 3.6 V
5.07
5.06
5.06
VBUS - V
VBUS - V
5.07
5.05
5.04
VBAT = 4 V
5.05
5.04
IBUS = 50 mA
5.03
5.03
5.02
5.02
5.01
VBAT = 2.5 V
5.01
5
4.99
2.5
5
2.7
2.9
3.1
3.3
3.5
VBAT - V
3.7
3.9
4.1
0
50
Figure 19.
10
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100
150
Load Current at VBUS - mA
200
Figure 20.
Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24150A bq24151A
bq24150A
bq24151A
www.ti.com
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
FUNCTIONAL BLOCK DIAGRAM (Charge Mode)
PMID
bq24150A/1A
PMID
PMID
VPMID
NMOS
VBUS
NMOS
SW
SW
SW
VBUS
VBUS
Q2
Q1
VREF1
OSC
Charge
Pump
-
PWM
Controller
CBC
Current
Limiting
Q3
ILIMIT
IIN_LIMIT
TCF
+
TJ
-
VBUS
+
VOUT
+
+
-
NMOS
-
+
-
VBUS UVLO
VUVLO
-
VBUS
+
Poor Input
VBUS
+
VBUS OVP
VOVP_IN
-
CSOUT
VOREG
VCSIN
CSIN
IOCHARGE
PWM_CHG
VREF
REFERNCES
& BIAS
VREF
BOOT
VIN(MIN)
TJ
+
+
VOVP
-
VOREG-VRCH
VOUT
PGND
PGND
VOUT
VCSIN
ITERM
CHARGE CONTROL
,
TIMER and DISPLAY
LOGIC
VBAT
VREF
ISHORT
AUXPWR
VOUT
VBUS
Thermal
Shutdown
-
TSHTDWN
VBAT
VPMID
+
+
-
*
Battery OVP
*
LINEAR _CHG
Sleep
STAT
* Recharge
OTG
Termination
-
+
*
VBAT
+
-
*
VSHORT
-
(I2 C Control)
Decoder
DAC
PGND
SCL
SDA
PWM Charge
Mode
* Signal Deglitched
Figure 21. Function Block Diagram of bq24150A/1A in Charge Mode
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bq24151A
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
www.ti.com
FUNCTIONAL BLOCK DIAGRAM (Boost Mode)
PMID
bq24150A/1A
PMID
VPMID
PMID
NMOS
VBUS
NMOS
SW
SW
SW
VBUS
VBUS
Q2
Q1
VREF1
OSC
Charge
Pump
PWM
Controller
CBC
Current
Limiting
Q3
PFM Mode
VBUS_FB
-
IBO
+
+
+
IBLIMIT
VREF
PWM_BOOST
+
VBUSOVP
-
TJ
+
REFERNCES
& BIAS
VREF
BOOT
VBUS OVP
VREF1
VPMID
Thermal
Shutdown
-
TSHTDWN
CSOUT
CSIN
75mA
VBUS_FB
VBUS
NMOS
VBAT
AUXPWR
PGND
PGND
VOUT
+
VBATMAX
-
VBAT
+
VBATMIN
-
*
Battery OVP
*
CHARGE CONTROL,
TIMER and DISPLAY
LOGIC
STAT
Low Battery
OTG
(I2C Control)
Decoder
DAC
* Signal Deglitched
PGND
SCL
SDA
Figure 22. Function Block Diagram of bq24150A/1A in Boost Mode
12
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Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): bq24150A bq24151A
bq24150A
bq24151A
www.ti.com
SLUS931A – APRIL 2009 – REVISED JANUARY 2010
OPERATIONAL FLOW CHART
VAUXPWRVUVLO
POR
Load I2C Registers
with Default Value
High Impedance Modeor Host
Controlled Operation Mode
No
Yes
Reset and Start
32-Minute Timer
Disable Charge
/CE=LOW
Charge Configure
Mode
/CE=HIGH
Any Charge State
Disable Charge
Wait Mode
Delay TINT
Indicate Power
not Good
Yes
No
Enable ISHORT
Yes
VAUXPWR
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