FEATURES
FUNCTIONAL BLOCK DIAGRAM
3 MHz switch mode charger
1.25 A charge current from dedicated charger
Up to 680 mA charging current from 500 mA USB host
Operating input voltage from 4.0 V up to 5.5 V
Tolerant input voltage −0.5 V to +20 V (USB VBUS)
Dead battery isolation FET between battery and
charger output
Battery thermistor input with automatic charger shutdown
for when battery temperature exceeds limits
Compliant with the JEITA Li-Ion battery charging
temperature specification
SYS_EN_OK flag to hold off system turn-on until battery is at
minimum required level for guaranteed system startup
due to minimum battery voltage and/or minimum battery
charge level requirements
EOC programming with C/20, C/10 and specific current level
selection
AC
OR
USB
VBUS VINx
ADP5065
SYSTEM
SWx
INDUCTOR
CFILT
3MHz
BUCK
PGNDx
ISO_Sx
IIN_EXT
TRK_EXT
SCL
SDA
ISO_Bx
CHARGER
CONTROL
BLOCK
BAT_SNS
THR
SYS_ON_OK
V_WEAK_SET
AGND
Li-Ion
+
PGNDx
09370-001
Data Sheet
Fast Charge Battery Manager with Power
Path and USB Compatibility
ADP5065
Figure 1.
APPLICATIONS
Digital still cameras
Digital video cameras
Single cell Li-Ion portable equipment
PDA, audio, GPS devices
Mobile phones
GENERAL DESCRIPTION
The ADP5065 charger is fully compliant with the USB 2.0,
USB 3.0, and USB Battery Charging Specification 1.1 and
enables charging via the mini USB VBUS pin from a wall
charger, car charger, or USB host port.
The ADP5065 operates from a 4 V to 5.5 V input voltage range
but is tolerant of voltages of up to 20 V. This alleviates the
concerns about the USB bus spiking during disconnect or
connect scenarios.
The ADP5065 also features an internal FET between the dc-todc charger output and the battery. This permits battery isolation
and, hence, system powering under a dead battery or no battery
scenario, which allows for immediate system function on
connection to a USB power supply.
Rev. D
Based on the type of USB source, which is detected by an external
USB detection chip, the ADP5065 can be set to apply the correct
current limit for optimal charging and USB compliance.
The ADP5065 comes in a very small and low profile 20-lead
WLCSP (0.5 mm pitch spacing) package.
The overall solution requires only five small, low profile external
components consisting of four ceramic capacitors (one of which
is the battery filter capacitor), one multilayer inductor. In addition
to these components, there is one optional dead battery situation
default setting resistor. This configuration enables a very small
PCB area to provide an integrated and performance enhancing
solution to USB battery charging and power rail provision.
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ADP5065
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Battery Isolation FET ................................................................. 19
Applications ....................................................................................... 1
Battery Detection ....................................................................... 20
Functional Block Diagram .............................................................. 1
Battery Pack Temperature Sensing .......................................... 21
General Description ......................................................................... 1
External Resistor for V_WEAK_SET ...................................... 22
Revision History ............................................................................... 2
I2C Interface ................................................................................ 23
Specifications..................................................................................... 3
Charger Operational Flowchart ............................................... 24
Recommended Input and Output Capacitance ........................ 5
I2C Register Map......................................................................... 25
I2C-Compatible Interface Timing Specifications ..................... 6
Register Bit Descriptions ........................................................... 26
Absolute Maximum Ratings ....................................................... 7
Applications Information .............................................................. 32
Thermal Resistance ...................................................................... 7
External Components ................................................................ 32
ESD Caution .................................................................................. 7
PCB Layout Guidelines .................................................................. 34
Pin Configuration and Function Descriptions ............................. 8
Power Dissipation and Thermal Considerations ....................... 35
Typical Performance Characteristics ............................................. 9
Charger Power Dissipation ....................................................... 35
Temperature Characteristics ..................................................... 11
Junction Temperature ................................................................ 36
Typical Waveforms ..................................................................... 13
Factory-Programmable Options .................................................. 37
Theory of Operation ...................................................................... 15
Packaging and Ordering Information ......................................... 38
Introduction ................................................................................ 15
Outline Dimensions ................................................................... 38
Charger Modes............................................................................ 17
Ordering Guide .......................................................................... 38
Thermal Management ............................................................... 19
REVISION HISTORY
2/13—Rev. C to Rev. D
Changed Maximum Duty Cycle from 93% to 96% ............................. 3
Changed Bit[3:0] Default Value from 0100 to 0101, Table 16 .. 26
Changed Bit 5 and Bit 2 Default Values from 1 to 0, Table 21 ....... 29
Deleted Disconnecting Supply Voltage at VINx Section ............... 34
9/12—Rev. B to Rev. C
Changed Bit[3:0] Default Value from 0011 to 0100, Table 16 ......... 27
Added Disconnecting Supply Voltage at VINx Section ............ 34
4/12—Rev. A to Rev. B
Changes to Features Section and General Description Section........ 1
Changes to Table 1 ............................................................................ 3
Changes to VIN1, VIN2 to PGND1, PGND2 Parameter, Table 4 ... 7
Changes to Introduction Section.................................................. 15
11/11—Rev. 0 to Rev. A
Changes to Figure 10 ...................................................................... 10
Changes to Figure 17 and Figure 18............................................. 11
Changes to Figure 41 ...................................................................... 36
10/11—Revision 0: Initial Version
Rev. D | Page 2 of 40
Data Sheet
ADP5065
SPECIFICATIONS
−40°C < TJ < 125°C, VIN = 5.0 V, VISO_S > 3.0 V, VHOT < VTHR < VCOLD, VBAT_SNS = 3.6 V, CVIN = 2.2 µF, CDCDC = 22 µF, CBAT = 22 µF, CCFILT =
4.7 µF, LOUT = 1 µH, all registers are at default values, unless otherwise noted.
Table 1.
Parameter
GENERAL PARAMETERS
Undervoltage Lockout
Total Input Current
Current Consumption
VINx
Battery, Standby
SWxPin Leakage Current
CHARGING PARAMETERS
Fast Charge Current, CC Mode
(Battery Voltage > VTRK_DEAD)
Fast Charge Current Accuracy
Trickle Charge Current1, 2
Weak Charge Current
Dead Battery
Trickle to Weak Charge Threshold
Trickle to Weak Charge Threshold
Hysteresis
Weak Battery
Weak to Fast Charge Threshold
Weak Battery Threshold Hysteresis
Battery Termination Voltage
Battery Termination Voltage Accuracy
Battery Overvoltage Threshold
Charge Complete Current
Charge Complete Current Threshold
Accuracy
Recharge Voltage Differential
Battery Node Short Threshold Voltage1
CHARGER DC-to-DC CONVERTER
Switching Frequency
Maximum Duty Cycle
Peak Inductor Current
Regulated System Voltage
Load Regulation
DC-to-DC Power
PMOS On Resistance
NMOS On Resistance
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
VUVLO
2.25
50
86
2.35
100
92
2.45
150
100
150
300
V
mV
mA
mA
mA
460
475
500
900
1500
mA
mA
mA
Falling threshold, higher of VCFILT and VBAT_SNS
Hysteresis, higher of VCFILT and VBAT_SNS rising
Nominal USB initialized current level 1
USB super speed
USB enumerated current level (specification
for China)
USB enumerated current level
Dedicated charger input
Dedicated wall charger
2
2
mA
µA
µA
No battery, no ISO_Sx load, switching 3 MHz
TJ = −40°C to +85°C
VVIN = 0 V, TJ = −40°C to +85°C
mA
VCFILT > VBAT_SNS + VCCDROP1, 2
Tj = 25°C, ICHG = 550 mA to 1250 mA
ICHG = 550 mA to 1150 mA, fast charge current
accuracy is guaranteed at temperatures from
Tj = 0°C to isothermal regulation limit (typically
Tj = 115°C)
ICHG = 1250 mA, Tj = 0°C to isothermal regulation
limit (typically Tj = 115°C)
IVIN
IQVIN
IQISO_B
−IOUT
15
0.22
ICHG
1250
ICHG(TOL)
−7
−8
+5
+8
%
%
−17
+8
%
20
ICHG + 20
25
mA
mA
ITRK_DEAD
ICHG_WEAK
16
VTRK_DEAD
ΔVTRK_DEAD
2.4
2.5
90
2.6
V
mV
On BAT_SNS1
VWEAK
ΔVWEAK
VTRM
2.9
3.0
90
4.200
3.1
V
mV
V
%
V
mA
%
On BAT_SNS1, 3
4.158
−0.3
VBATOV
IEND
VRCH
VBAT_SHR
fSWCHG
DMAX
IL(PK)
VISO_STRK
RDS(ON)P
RDS(ON)N
4.242
+0.3
VCFILT − 0.15
52.5
−25
+25
−35
−55
+35
+55
2.3
2.8
1500
3.21
260
2.4
3
96
1750
3.3
5
220
160
2.5
3.2
2000
3.39
285
210
Rev. D | Page 3 of 40
%
%
mV
V
MHz
%
mA
V
mV/A
mΩ
mΩ
When VTRK_DEAD < VBAT_SNS < VWEAK1, 3
On BAT_SNS, TJ = 0°C to 115°C1
On BAT_SNS, TJ = 25°C, IEND = 52.5 mA1
Relative to CFILT voltage, BAT_SNS rising
VBAT_SNS = VTRM1
IEND = 72.5 mA or 92.5 mA, TJ = 0°C to 115°C
IEND = 52.5 mA, TJ = 0°C to 115°C
IEND = 32.5 mA, TJ = 0°C to 115°C
Relative to VTRM, BAT_SNS falling1
VBAT_SNS < VTRK_DEAD, trickle charging mode
ADP5065
Data Sheet
Parameter
BATTERY ISOLATION FET
Bump to Bump Resistance Between
ISO_Bx and ISO_Sx Bumps
Symbol
Regulated System Voltage
Battery Supplementary Threshold
HIGH VOLTAGE BLOCKING FET
VINx Input
High Voltage Blocking FET On
Resistance
Current, Suspend Mode
Input Voltage
Good Threshold
Rising
Falling
Overvoltage Threshold
Overvoltage Threshold Hysteresis
VINx Transition Timing
Minimum Rise Time for VINx from
5 V to 20 V
Minimum Fall Time for VINx from
4 V to 0 V
THERMAL CONTROL
Isothermal Charging Temperature
Thermal Early Warning Temperature
Thermal Shutdown Temperature
VISO_SFC
VTHISO
THERMISTOR CONTROL
Thermistor Current
10,000 NTC
100,000 NTC
Thermistor Capacitance
Cold Temperature Threshold
Resistance Thresholds
Cool to Cold Resistance
Cold to Cool Resistance
Hot Temperature Threshold
Resistance Thresholds
Hot to Typical Resistance
Typical to Hot Resistance
JEITA SPECIFICATION 4
JEITA Cold Temperature
Resistance Thresholds
Cool to Cold Resistance
Cold to Cool Resistance
JEITA Cool Temperature
Min
Typ
Max
Unit
Test Conditions/Comments
76
115
mΩ
3.3
5
3.45
10
V
mV
Includes bump resistances and battery isolation
PMOS on resistance; on battery supplement
mode, VIN = 0 V, VISO_B = 3.6 V, IISO_B = 500 mA
VTRK_DEAD < VBAT_SNS, fast charging CC mode
VISO_S[1:2] < VISO_B[1:2], VSYS rising
RDSONHV
340
455
mΩ
IIN = 500 mA
ISUSPEND
1.3
2.5
mA
EN_CHG = low
3.9
3.6
5.42
75
4.0
3.67
5.5
V
V
V
mV
RDSONISO
3.15
0
VVIN_OK_RISE
VVIN_OK_FALL
VVIN_OV
3.78
tVIN_RISE
10
µs
tVIN_FALL
10
µs
5.35
TLIM
TSDL
TSD
115
130
140
110
INTC_10k
INTC_100k
CNTC
TNTC_COLD
400
40
100
0
RCOLD_FALL
RCOLD_RISE
TNTC_HOT
24,050
23,100
RHOT_FALL
RHOT_RISE
2990
2730
TJEITA_COLD
27,300
26,200
60
30,600
29,400
3310
3030
3640
3330
0
RCOLD_FALL
RCOLD_RISE
TJEITA_COOL
24,050
23,100
Resistance Thresholds
Typical to Cool Resistance
Cool to Typical Resistance
JEITA Typical Temperature
RTYP_FALL
RTYP_RISE
TJEITA_TYP
15,200
14,500
Resistance Thresholds
Warm to Typical Resistance
Typical to Warm Resistance
JEITA Warm Temperature
RWARM_FALL
RWARM_RISE
TJEITA_WARM
4710
4320
Resistance Thresholds
Hot to Warm Resistance
Warm to Hot Resistance
JEITA Hot Temperature
RHOT_FALL
RHOT_RISE
TJEITA_HOT
2990
2730
°C
°C
°C
°C
TJ rising
TJ falling
μA
μA
pF
°C
No battery charging occurs
Ω
Ω
°C
No battery charging occurs
Ω
Ω
°C
27,300
26,200
10
30,600
29,400
17,800
17,000
20,400
19,500
5400
4950
45
6100
5590
3310
3030
60
3640
3330
Rev. D | Page 4 of 40
Ω
Ω
°C
Ω
Ω
°C
Ω
Ω
°C
Ω
Ω
°C
No battery charging occurs
Battery charging occurs at 50% of
programmed level
Normal battery charging occurs at
default/programmed levels
Battery termination voltage (VTRM) is reduced
by 100 mV
No battery charging occurs
Data Sheet
Parameter
BATTERY DETECTION
Sink Current
Source Current
Battery Threshold
Low
High
No Battery Threshold
Battery Detection Timer
TIMERS
Start Charging Delay Timer
Trickle Charge Timer
Fast Charge Timer
Charge Complete Timer
Deglitch Timer
Watchdog Timer1
Safety Timer
Battery Node Short Timer1
LOGIC INPUTS
Maximum Voltage on Digital Inputs
Maximum Logic Low Input Voltage
Minimum Logic High Input Voltage
Pull-Down Resistance
ADP5065
Symbol
Min
Typ
Max
Unit
ISINK
ISOURCE
13
7
20
10
34
13
mA
mA
VBATL
VBATH
VNOBAT
1.8
1.9
3.4
3.3
2.0
V
V
V
VTRM ≥ 3.7 V, valid after charge complete (see
Figure 38)
VTRM < 3.7 V, valid after charge complete (see
Figure 38)
3.0
V
tBATOK
333
ms
tSTART
tTRK
tCHG
tEND
tDG
tWD
tSAFE
tBAT_SHR
1
60
600
7.5
31
32
40
30
sec
min
min
min
ms
sec
min
sec
VDIN_MAX
VIL
VIH
36
44
5.5
0.5
1.2
215
350
610
Test Conditions/Comments
V
V
V
kΩ
VBAT_SNS = VTRM, ICHG < IEND
Applies to VTRK, VRCH, IEND, VDEAD, VVIN_OK
Applies to SCL, SDA, TRK_EXT, IIN_EXT
Applies to SCL, SDA, TRK_EXT, IIN_EXT
Applies to TRK_EXT, IIN_EXT
These values are programmable via I2C. Values are given with default register values.
The output current during charging can be limited by IBUS or by the isothermal charging mode.
3
Programmable via external resistor programming, if required.
4
JEITA can be enabled or disabled in I2C.
1
2
RECOMMENDED INPUT AND OUTPUT CAPACITANCE
Table 2.
Parameter
CAPACITANCE
VINx Capacitance
CFILT Pin Total External Capacitance
ISO_Sx Pin Total Capacitance
ISO_Bx Pin Total Capacitance
Min
1.0
2.0
10
10
Typ
Max
Unit
Test Conditions/Comments
4.7
5.0
50
µF
μF
µF
µF
Effective capacitance
Effective capacitance
Effective capacitance
Effective capacitance
Rev. D | Page 5 of 40
ADP5065
Data Sheet
I2C-COMPATIBLE INTERFACE TIMING SPECIFICATIONS
Table 3.
Parameter 1
I2C-COMPATIBLE INTERFACE 2
Capacitive Load, Each Bus Line
SCL Clock Frequency
SCL High Time
SCL Low Time
Data Setup Time
Data Hold Time
Setup Time for Repeated Start
Hold Time for Start/Repeated Start
Bus Free Time Between a Stop and a Start Condition
Setup Time for Stop Condition
Rise Time of SCL/SDA
Fall Time of SCL/SDA
Pulse Width of Suppressed Spike
1
2
Symbol
CS
fSCL
tHIGH
tLOW
tSUDAT
tHDDAT
tSUSTA
tHDSTA
tBUF
tSUSTO
tR
tF
tSP
Min
Typ
0.6
1.3
100
0
0.6
0.6
1.3
0.6
20
20
0
Max
Unit
400
400
pF
kHz
µs
µs
ns
µs
µs
µs
µs
µs
ns
ns
ns
0.9
300
300
50
Guaranteed by design.
A master device must provide a hold time of at least 300 ns for the SDA signal to bridge the undefined region of the falling edge of SCL. See Figure 2, the I2C timing
diagram.
Timing Diagram
SDA
tLOW
tR
tF
tSU,DAT
tF
tHD,STA
tSP
tBUF
tR
SCL
tHIGH
tHD,DAT
tSU,STA
Sr
tSU,STO
P
S
09370-002
S
S = START CONDITION
Sr = REPEATED START CONDITION
P = STOP CONDITION
Figure 2. I2C Timing Diagram
Rev. D | Page 6 of 40
Data Sheet
ADP5065
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 4.
Parameter
VIN1, VIN2 to PGND1, PGND2
All Other Pins to AGND
Continuous Drain Current, Battery Supplementary Mode, from ISO_Bx to ISO_Sx
TJ ≤ 85°C
TJ = 125°C
Storage Temperature Range
Operating Junction Temperature Range
Soldering Conditions
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Rating
−0.5 V to +20 V
−0.3 V to +6 V
Table 5. Thermal Resistance
2.2 A
1.1 A
−65°C to +150°C
−40°C to +125°C
JEDEC J-STD-020
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Package Type
20-Lead WLCSP1
1
θJA
46.8
θJC
0.7
θJB
9.2
Unit
°C/W
5 × 4 array, 0.5 mm pitch (2.75 mm × 2.08 mm); based on a JEDEC, 2S2P,
4-layer board with 0 m/sec airflow.
Maximum Power Dissipation
The maximum safe power dissipation in the ADP5065 package
is limited by the associated rise in junction temperature (TJ) on
the die. At approximately 150°C, which is the glass transition
temperature, the plastic changes its properties. Even temporarily
exceeding this temperature limit may change the stresses that
the package exerts on the die, permanently shifting the parametric performance of the ADP5065. Exceeding a junction
temperature of 175°C for an extended period of time can result
in changes in the silicon devices that potentially cause failure.
ESD CAUTION
Rev. D | Page 7 of 40
ADP5065
Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
BALL A1
CORNER
2
1
V_WEAK_SET SCL
3
4
THR
IIN_EXT
A
SDA
TRK_EXT
ISO_B1
ISO_B2
BAT_SNS
AGND
ISO_S1
ISO_S2
SW1
PGND1
SW2
PGND2
B
C
VIN1 SYS_ON_OK
D
VIN2
CFILT
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
09370-003
E
Figure 3. Pin Configuration
Table 6. Pin Function Descriptions
Pin
No.
D3, E3
D1, E1
D4, E4
Type 1
I/O
I/O
G
Description
DC-to-DC Converter Inductor Connection. These pins are high current outputs when in charging mode.
Power Connection to USB VBUS. These pins are high current inputs when in charging mode.
Charger Power Ground. These pins are high current inputs when in charging mode.
G
I/O
I/O
I/O
Analog Ground.
4.7 μF Filter Capacitor Connection. This pin is a high current input/output when in charging mode.
Charger Supply Side Input to Internal Isolation FET/Battery Current Regulation FET.
Battery Supply Side Input to Internal Isolation FET/Battery Current Regulation FET.
A2
B1
A4
Mnemonic
SW1, SW2
VIN1, VIN2
PGND1,
PGND2
AGND
CFILT
ISO_S1, ISO_S2
ISO_B1,
ISO_B2
SCL
SDA
IIN_EXT
I
I/O
I
B2
TRK_EXT
I
A3
C1
D2
THR
BAT_SNS
SYS_ON_OK
I
I
O
A1
V_WEAK_SET
I/O
I2C-Compatible Interface Serial Clock.
I2C-Compatible Interface Serial Data.
Set Input Current Limit. This pin sets the input current limit directly. When IIN_EXT = low or high-Z, the
input limit is 100 mA. When IIN_EXT = high, the input limit is 500 mA.
Enable Trickle Charge Function. When TRK_EXT = low or high-Z, the trickle charge is enabled. When
TRK_EXT = high, the trickle charge is disabled.
Battery Pack Thermistor Connection. If not used, connect a dummy 10 kΩ resistor from THR to GND.
Battery Voltage Sense Pin.
Battery Okay Open-Drain Output Flag. Active low. This pin enables the system when the battery
reaches VWEAK.
External Resistor Setting Pin for V_WEAK threshold. The use of this pin is optional. When not in use,
connect to GND.
C2
E2
C3, C4
B3, B4
1
I is input, O is output, I/O is input/output, and G is ground.
Rev. D | Page 8 of 40
Data Sheet
ADP5065
TYPICAL PERFORMANCE CHARACTERISTICS
100
100
VIN INPUT LIMIT 500mA
90
90
VIN INPUT LIMIT 100mA
80
80
70
60
50
40
50
40
30
30
20
20
10
10
2.9
3.3
3.7
4.1
4.5
BATTERY VOLTAGE (V)
0
0.01
09370-004
0
2.5
0.1
1
SYSTEM OUTPUT CURRENT (A)
Figure 4. Battery Charger Efficiency vs. Battery Voltage, VIN = 5.0 V
Figure 7. System Voltage Efficiency vs. Output Current, VIN = 5.0 V
3.35
4.5
3.34
4.3
3.33
4.1
SYSTEM VOLTAGE (V)
SYSTEM VOLTAGE (V)
60
09370-007
EFFICIENCY (%)
EFFICIENCY (%)
70
3.32
3.31
3.30
3.29
3.28
3.9
3.7
3.5
3.3
SYSTEM VOLTAGE
3.1
3.27
2.9
3.26
2.7
0.1
1
SYSTEM OUTPUT CURRENT (A)
Figure 5. System Voltage Regulation vs. Output Current, VIN = 5.0 V
600
120
BATTERY CHARGE CURRENT (mA)
140
500
400
300
200
100
3.0
3.3
3.6
3.9
4.2
BATTERY VOLTAGE (V)
3.3
3.6
3.9
4.2
Figure 8. System Voltage vs. Battery Voltage, VIN = 5.0 V, ILIM = 100 mA
700
0
2.7
3.0
BATTERY VOLTAGE (V)
09370-006
BATTERY CHARGE CURRENT (mA)
2.5
2.7
100
80
60
40
20
0
2.7
3.0
3.3
3.6
3.9
4.2
BATTERY VOLTAGE (V)
Figure 9. USB Limited Battery Charge Current vs. Battery Voltage,
VIN = 5.0 V, ILIM = 100 mA
Figure 6. USB Compliant Charge Current vs. Battery Voltage,
VIN = 5.0 V, ILIM = 500 mA
Rev. D | Page 9 of 40
09370-009
0.01
09370-005
3.25
0.001
09370-008
BATTERY VOLTAGE
ADP5065
Data Sheet
4.4
0.7
IISO_B
BATTERY VOLTAGE (V)
RON RESISTANCE (mΩ)
95
90
85
80
70
2.7
3.0
3.3
3.6
3.9
4.2
BATTERY VOLTAGE (V)
09370-010
75
Figure 10. Battery Isolation FET Resistance vs. Battery Voltage, VIN = 5.0 V,
Load Current = 1.0 A
1.6
1.4
VIN CURRENT (mA)
1.2
1.0
0.8
0.6
0.4
0
1
2
3
4
VIN VOLTAGE (V)
5
6
09370-011
0.2
Figure 11. VINx Current vs. VINx Voltage, Suspend Mode (EN_CHG = 0)
Rev. D | Page 10 of 40
4.2
0.6
4.0
0.5
IVIN
3.8
0.4
3.6
0.3
3.4
0.2
3.2
0.1
3.0
0
0
50
100
150
CHARGE TIME (Minutes)
Figure 12. Charge Profile, VIN = 5.0 V, ILIM = 500 mA,
Battery Capacity = 1320 mAh
CURRENT (A)
VBAT_SNS
09370-012
100
Data Sheet
ADP5065
TEMPERATURE CHARACTERISTICS
1.0
5.70
5.65
0.5
5.60
VTRM ACCURACY (%)
VIN OVERVOLTAGE PROTECTION (V)
5.75
5.55
5.50
5.45
5.40
VTRM
VTRM
VTRM
VTRM
= 3.50V
= 3.80V
= 4.20V
= 4.42V
0
–0.5
5.35
–20
0
20
40
60
80
100
120
AMBIENT TEMPERATURE (°C)
–1.0
–40
09370-013
Figure 13. VINx Overvoltage Protection Rising Threshold vs. Ambient
Temperature
60
80
100
120
3.08
SWITCHING FREQUENCY (MHz)
3.300
3.295
3.290
3.285
3.280
3.06
3.04
3.02
3.00
2.98
2.96
2.94
2.92
0
20
40
60
80
100
120
AMBIENT TEMPERATURE (°C)
2.90
–40
09370-014
–20
Figure 14. System Voltage vs. Ambient Temperature, VIN = 5.0 V, RLOAD = 33 Ω
–20
0
20
40
60
80
100
120
AMBIENT TEMPERATURE (°C)
09370-017
SYSTEM VOLTAGE (V)
40
3.10
3.305
Figure 17. Switching Frequency vs. Ambient Temperature, VIN = 5.0 V
500
1.10
VIN INPUT LIMIT 500mA
450
1.09
400
CHARGE CURRENT (A)
1.08
350
300
250
200
150
100
1.07
1.06
1.05
1.04
1.03
1.02
VIN INPUT LIMIT 100mA
50
1.01
–20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
100
120
09370-015
INPUT CURRENT LIMIT (mA)
20
Figure 16. Termination Voltage vs. Ambient Temperature, VIN = 5.0 V, VTRM
Programming 3.50 V, 3.80 V, 4.20 V, and 4.42 V
3.310
0
–40
0
AMBIENT TEMPERATURE (°C)
3.315
3.275
–40
–20
Figure 15. Input Current Limit vs. Ambient Temperature, VIN = 5.0 V
1.00
–40
–20
0
20
40
60
80
100
120
AMBIENT TEMPERATURE (°C)
Figure 18. Fast Charge Current vs. Ambient Temperature,
VIN = 5.0 V, VISO_B = 3.6 V, ICHG = 1050 mA
Rev. D | Page 11 of 40
09370-018
5.25
–40
09370-016
5.30
ADP5065
Data Sheet
0.8
1.0
0.8
0.7
0.6
CHARGE CURRENT (A)
0.7
0.6
0.5
0.4
0.3
0.4
0.3
0.2
0.2
0.1
0
–40
–20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
09370-019
0.1
Figure 19. Battery Leakage Current vs. Ambient Temperature
1.32
1.30
1.28
1.26
1.24
1.22
1.20
–20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
09370-020
1.18
1.16
–40
0
0
20
40
60
80
100
120
AMBIENT TEMPERATURE (°C)
Figure 21. Isothermal Regulation of Charge Current vs. Ambient
Temperature, ICHG = 750 mA, VIN = 5.0 V, VISO_B = 3.6 V
1.34
INPUT CURRENT (mA)
0.5
Figure 20. VINx Quiescent Current vs. Temperature, VIN = 5.0 V,
Suspend Mode (EN_CHG = 0)
Rev. D | Page 12 of 40
09370-021
BATTERY LEAKAGE CURRENT (µA)
0.9
VISO_B = 2.7V
VISO_B = 3.6V
VISO_B = 4.2V
Data Sheet
ADP5065
TYPICAL WAVEFORMS
CIN INRUSH
CURRENT
T
T
IISO_B
IISO_B
3
3
IVIN
IVIN
4
4
VISO_S
VISO_S
VIN
VIN
2
CH1 2.0V
CH2 2.0V
CH3 200mA CH4 200mA
100µs
T
0.00s
A CH2
44mA
1
09370-022
1
CH1 2.0V
CH2 2.0V
CH3 200mA CH4 200mA
100µs
T
0.00s
A CH3
44mA
09370-025
2
Figure 22. Typical Waveforms, VINx Connect From High Impedance to
VBUS, ILIM = 100 mA
Figure 25. Typical Waveforms, VINx Disconnect from VBUS to High
Impedance, ILIM = 100 mA
T
T
IISO_B
3
3
IISO_B
IVIN
IVIN
4
4
VISO_S
VISO_S
VIN
VIN
CH1 2.0V
CH2 2.0V
CH3 500mA CH4 500mA
20µs
T
0.00s
A CH3
40mA
1
09370-023
1
100µs
T
0.00s
CH1 2.0V
CH2 2.0V
CH3 500mA CH4 500mA
Figure 23. Mode Change, Fast Charge to Suspend (EN_CHG from High to
Low), ILIM = 500 mA, RLOAD = 33 Ω
A CH3
40mA
09370-026
2
2
Figure 26. Mode Change, Suspend to Fast Charge (EN_CHG from Low to
High), ILIM = 500 mA, RLOAD = 33 Ω
T
T
VISO_S
2
IISO_B
SW
3
IVIN
4
VISO_S
1
VIN
2
CH1 2.0V
CH2 2.0V
CH3 500mA CH4 500mA
100µs
T
0.00s
A CH3
430mA
4
09370-024
1
Figure 24. VINx Current Limit Change from 100 mA to 500 mA,
EN_CHG = High, VIN = 5.0 V, RLOAD = 33 Ω
CH1 2.0V CH2 50.0mV
CH4 500mA
B
W
800ns
T
–8.0ns
A CH1
2.16V
09370-027
ISW
Figure 27. Typical Waveforms, Heavy Load, VIN = 5.0 V, IISO_S = 1000 mA
Rev. D | Page 13 of 40
ADP5065
Data Sheet
T
T
VISO_S
2
VISO_S
1
SW
1A
1
ISW
IISO_S
0A
4
200µs
A CH4
T
600.0µs
250mA
Figure 28. System Voltage Load Transient, VIN = 5.0 V, No Battery
CH1 2.0V CH2 50.0mV
CH4 200mA
T
3
VISO_S
CH2 2.0V
100µs
T
0.00s
A CH2
2.76V
09370-029
2
CH3 2.0A
W
800ns
T
–8.00ns
A CH1
2.16V
Figure 30. Typical Waveforms, Light Load, VIN = 5.0 V, IISO_S = 100 mA
CISO_B AND CISO_S
INRUSH CURRENT
IISO_B
B
09370-030
CH1 100mV BW
CH4 500mA
09370-028
4
Figure 29. Battery Connect
Rev. D | Page 14 of 40
Data Sheet
ADP5065
THEORY OF OPERATION
INTRODUCTION
The highly efficient switcher dc-to-dc architecture enables higher
charging currents as well as a lower temperature charging
operation that results in faster charging times because of the
following features:
The ADP5065 is fully compliant with the USB 3.0 battery charging
specification and enables charging via the mini USB VBUS pin
from a wall charger, car charger, or USB host port. Based on the
type of USB source, which is detected by an external USB
detection device, the ADP5065 can be set to apply the correct
current limit for optimal charging and USB compliance. The USB
charger permits correct operation under all USB compliant
sources such as, wall chargers, host chargers, hub chargers, and
standard hosts and hubs.
•
•
•
A processor is able to control the USB charger using the I2C to
program the charging current and numerous other parameters
including
The ADP5065 is a fully I C-programmable charger for singlecell lithium-ion or lithium-polymer batteries suitable for a wide
range of portable applications.
2
3 MHz switch mode charger.
1.25 A charge current from dedicated charger.
Up to 680 mA of charging current from a 500 mA
USB host.
The ADP5065 operates from an input voltage from 4 V to 5.5 V
but is tolerant of voltages of up to 20 V. This alleviates the concern
about USB bus spiking during disconnection or connection
scenarios.
The ADP5065 features an internal FET between the dc-to-dc
charger output and the battery. This permits battery isolation
and, hence, system powering in a dead battery or no battery
scenario, which allows for immediate system function on
connection to a USB power supply.
•
•
•
•
•
•
•
•
•
•
•
•
Rev. D | Page 15 of 40
Trickle charge current level.
Trickle charge voltage threshold.
Weak charge (constant current) charge current level.
Fast charge (constant current) charge current level.
Fast charge (constant voltage) charge voltage level at 1%
accuracy.
Fast charge safety timer period.
Watchdog safety timer parameters.
Weak battery threshold detection.
Charge complete threshold.
Recharge threshold.
Charge enable/disable.
Battery pack temperature detection and automatic charger
shutdown.
ADP5065
Data Sheet
CFILT
E2
E1
COIL
CURRENT
DETECTION
SW1
VIN2
SW2
+
–
5.42V
HV-FET
CONTROL
D3
E3
VIN LIMIT
DC-DC CONTROL
–
D1
IND_PEAK_INT
HIGH VOLTAGE
BLOCKING FET
VIN1
+
TO USB VBUS
OR WALL
ADAPTER
VIN
OVERVOLTAGE
ISO_S1
TO SYSTEM
LOAD
C3
3MHz OSC
BATTERY
ISOLATION FET
TRICKLE
CURRENT
SOURCE
+
–
CHARGE CONTROL
EOC
ISO_B1
B4
CV-MODE
RECHARGE
BATTERY
DETECTION
SINK
–
AND
CONTROL LOGIC
SDA
B3
ISO_B2
+
+
B1
I2C INTERFACE
SCL
CFILT
–
VIN GOOD
A2
C4
+
3.9V
ISO_S2
WEAK
–
+
–
B2
TRICKLE
IIN_EXT
BATTERY:
OPEN
SHORT
TRK_EXT
BAT_SNS
+
A4
C1
3.4V
1.9V
–
BATTERY DETECTION
–
+
+
TSD DOWN 110ºC
CONTROL
HOT
PGND2
C2
D4
E4
0.5V
A3
SINGLE CELL
Li-Ion
Figure 31. Block Diagram
Rev. D | Page 16 of 40
09370-031
THR
NTC
PGND1
THERMAL CONTROL
AGND
ISOTHERMAL 115ºC
TSD 140ºC
SYSTEM
VOLTAGE OK
LOGIC
WARNING 130ºC
D2
NTC CURRENT
WARM
–
SYS_ON_OK
COLD
COOL
+
0.5V
CFILT – 150mV
BATTERY OVERVOLTAGE
–
V_WEAK_SET
+
OPTIONAL
–
A1
Data Sheet
ADP5065
The ADP5065 also includes a number of significant features to
optimize charging and functionality, including
•
•
•
•
•
•
•
Thermal regulation for maximum performance.
USB host current-limit accuracy: ±5 %.
Termination voltage accuracy: ±1 %.
Battery thermistor input with automatic charger shutdown
in the event that the battery temperature exceeds limits.
(Compliant with the JEITA Li-Ion battery charging
temperature specification.)
Offloads processor to manage external pin (TRK_EXT)
control to enable/disable trickle charging.
Direct external pin (IIN_EXT) control of 100 mA or
500 mA input current limit.
Optional external resistor programming input, V_WEAK_
SET, which is used for setting the VWEAK threshold. When
the battery reaches the VWEAK threshold, the ADP5065 pulls
down the SYS_EN_OK open-drain output flag. The flag can
be used to hold off system turn on until the battery is at the
minimum required level for a guaranteed system startup.
CHARGER MODES
Mode
USB
(China
Only)
USB 2.0
USB 3.0
Dedicated
Charger
Standard USB Limit
100 mA limit for standard USB host or hub
ADP5065 Function
100 mA input current limit
or I2C programmed value
300 mA limit for
Chinese USB
specification
100 mA limit for standard USB host or hub
500 mA limit for standard USB host or hub
150 mA limit for
super speed USB 3.0
host or hub
900 mA limit for
super speed, high
speed USB host or
hub charger
1500 mA limit for
dedicated charger or
low/full speed USB
host or hub charger
300 mA input current limit
or I2C programmed value
100 mA input current limit
or I2C programmed value
500 mA input current limit
or I2C programmed value
150 mA input current limit
or I2C programmed value
900 mA input current limit
or I2C programmed value
1500 mA input current limit
or I2C programmed value
Trickle Charge Mode
Input Current Limit
The VINx input current limit is controlled via an internal I2C
ILIM register. The input current limit can also be controlled via
the IIN_EXT pin as outlined in Table 7. Any change in the I2C
default from 100 mA dominates over the pin setting.
Table 7. IIN_EXT Operation
IIN_EXT
0
1
Table 8. Input Current Compatibility with Standard USB Limits
Function
100 mA input current limit or I2C programmed value
500 mA input current limit or I2C programmed value
(or reprogrammed I2C value from 100 mA default)
USB Compatibility
The ADP5065 charger provides support for the following
connections through the single connector VINx pin.
The ADP5065 features a programmable input current limit to
ensure compatibility with the requirements listed in Table 8. The
current limit defaults to 100 mA to allow compatibility with a
USB host or hub that is not configured.
The I2C register default is 100 mA. An I2C write command
to the ILIM register overrides the IIN_EXT pin and the I2C
register default value can be reprogrammed for alternative
requirements.
A deeply discharged Li-Ion cell may exhibit a very low cell
voltage making it unsafe to charge the cell at high current rates. The
ADP5065 charger uses a trickle charge mode to reset the battery
pack protection circuit and lift the cell voltage to a safe level for fast
charging. A cell with a voltage below VTRK_DEAD is charged with
the trickle mode current, ITRK_DEAD. During trickle charging mode,
the CHARGER_STATUS register is set.
During trickle charging, the ISO_Sx node is regulated to
VISO_STRK by the dc-to-dc converter and the battery isolation FET
is off, which means the battery is isolated from the system
power supply.
Trickle charging can be controlled via the TRK_EXT external
pin (see Table 9). Note that any change in the I2C EN_TRK bit
dominates over the pin setting.
Table 9. TRK_EXT Operation
TRK_EXT
0
1
Function
Trickle charge enabled
Trickle charge disabled
Trickle Charge Mode Timer
When the input current limiting feature is used, the available
input current may be too low for the charger to meet the programmed charging current, ICHG, and the rate of charge is
reduced. In this case, the VIN_ILIM flag is set.
When connecting voltage to VINx without having the proper
voltage level on the battery side, the HV blocking part is in a
state wherein it draws only 1.3 mA (typical) of current until the
VIN has reached the VIN_OK level.
The duration of trickle charge mode is monitored to ensure the
battery is revived from its deeply discharged state. If trickle
charge mode runs for longer than 60 minutes without the cell
voltage reaching VTRK_DEAD, a fault condition is assumed and
charging stops. The fault condition is asserted on the
CHARGER_STATUS register, allowing the user to initiate
the fault recovery procedure specified in the Fault Recovery
section.
Rev. D | Page 17 of 40
ADP5065
Data Sheet
Weak Charge Mode (Constant Current)
Fast Charge Mode (Constant Voltage)
When the battery voltage exceeds VTRK_DEAD but is less than
VWEAK, the charger switches to the intermediate charge mode.
As the battery charges, its voltage rises and approaches the termination voltage, VTRM. The ADP5065 charger monitors the voltage
on the BAT_SNS pin to determine when charging should end.
However, the internal ESR of the battery pack combined with
PCB and other parasitic series resistances creates a voltage drop
between the sense point at the BAT_SNS pin and the cell terminal
itself. To compensate for this and ensure a fully charged cell, the
ADP5065 enters a constant voltage charging mode when the
termination voltage is detected on the BAT_SNS pin. The
ADP5065 reduces charge current gradually as the cell continues to
charge, maintaining a voltage of VTRM on the BAT_SNS pin. During
fast charge mode (constant voltage), the CHARGER_ STATUS
register is set.
During the weak charge mode, the battery voltage is too low to
allow the full system to power-up. Due to the low level of the
battery, the USB transceiver cannot be powered and, therefore,
cannot enumerate for more current from a USB host.
Consequently, the USB limit remains at 100 mA.
The system microcontroller may or may not be powered by the
charger output voltage (VISO_SFC) depending upon the amount of
current required by the microcontroller and/or the system
architecture. In this case, the battery charge current (ICHG_WEAK)
cannot be increased above 20 mA to ensure the microcontroller
can still operate (if doing so) nor increased above the 100 mA
USB limit. Thus, set the battery charging current as follows:
•
•
Set the default 20 mA via the linear trickle charger branch (to
ensure that the microprocessor remains alive if powered by
the main switching charger output, ISO_Sx). Any residual
current on the main switching charger output, ISO_Sx, is
used to charge the battery at up to the preprogrammed
level in the I2C for ICHG (fast charge current limit) or ILIM
(input current limit).
During weak current mode, other features may prevent the
actual programmed weak charging current from reaching
its full programmed value. Isothermal charging mode or
input current limiting for USB compatibility may affect the
programmed weak charging current value under certain
operating conditions. During weak charging, the ISO_Sx
node is regulated to VISO_SFC by the battery isolation FET.
Fast Charge Mode (Constant Current)
When the battery voltage exceeds VTRK_DEAD and VWEAK, the
charger switches to fast charge mode, charging the battery with
the constant current, ICHG. During fast charge mode (constant
current), the CHARGER_STATUS register is set.
During constant current mode, other features may prevent the
current, ICHG, from reaching its full programmed value.
Isothermal charging mode or input current limiting for USB
compatibility may affect the value of ICHG under certain operating conditions. The voltage on ISO_Sx is regulated to stay at
VISO_SFC by the battery isolation FET when VISO_B < VISO_SFC.
Fast Charge Mode Timer
The duration of fast charge mode is monitored to ensure that
the battery is charging correctly. If the fast charge mode runs for
longer than tCHG without the voltage at the BAT_SNS pin
reaching VTRM, a fault condition is assumed and charging stops.
The fault condition is asserted on the CHARGER_STATUS register allowing the user to initiate the fault recovery procedure
specified in the Fault Recovery section.
If the fast charge mode runs for longer than tCHG, and VTRM has
been reached on the BAT_SNS pin but the charge current has
not yet fallen below IEND, charging stops. No fault condition is
asserted in this circumstance and charging resumes as normal if
the recharge threshold is breached.
Watchdog Timer
The ADP5065 charger features a programmable watchdog timer
function to ensure charging is under the control of the
processor. The watchdog timer starts running when the
ADP5065 charger determines that the processor should be
operational, that is, when the processor sets the RESET_WD bit
for the first time or when the battery voltage is greater than the
weak battery threshold, VWEAK. When the watchdog timer has
been triggered, it must be reset regularly within the watchdog
timer period, tWD.
If the watchdog timer expires without being reset while in
charger mode, the ADP5065 charger assumes there is a software
problem and triggers the safety timer, tSAFE. For more information see the Safety Timer section.
Rev. D | Page 18 of 40
Data Sheet
ADP5065
Safety Timer
Thermal Shutdown and Thermal Early Warning
If the watchdog timer (see the Watchdog Timer section for
more information) expires while in charger mode, the ADP5065
charger initiates the safety timer, tSAFE. If the processor has
programmed charging parameters by this time, the ILIM is set to
the default value. Charging continues for a period of tSAFE, then
the charger switches off and sets the CHARGER_STATUS register.
The ADP5065 switching charger features a thermal shutdown
threshold detector. If the die temperature exceeds TSD, the
ADP5065 charger is disabled, and the TSD 140°C bit is set. The
ADP5065 charger can be reenabled when the die temperature
drops below the TSD falling limit and the TSD 140°C bit is reset.
To reset the TSD 140°C bit, write to the I2C Fault Register 0x0D
or cycle the power.
Charge Complete
The ADP5065 charger monitors the charging current while
in constant voltage fast charge mode. If the current falls
below IEND and remains below IEND for tEND, charging stops
and the CHDONE flag is set. If the charging current falls below
IEND for less than tEND and then rises above IEND again, the tEND
timer resets.
Before die temperature reaches TSD, the early warning bit is set if
TSDL is exceeded. This allows the system to accommodate power
consumption before thermal shutdown occurs.
Recharge
To recover from a charger fault (when the CHARGER_STATUS
equals 110), cycle power on VINx or write high to reset the I2C
fault bits in the fault register.
After the detection of charge complete, and the cessation of
charging, the ADP5065 charger monitors the BAT_SNS pin as
the battery discharges through normal use. If the BAT_SNS pin
voltage falls to VRCH, the charger reactivates charging. Under
most circumstances, triggering the recharge threshold results in
the charger starting directly into fast charge constant voltage
mode.
Battery Charging Enable/Disable
The ADP5065 charging function can be disabled by setting the
I2C EN_CHG bit to low.
THERMAL MANAGEMENT
Isothermal Charging
To assist with the thermal management of the ADP5065
charger, the battery charger provides an isothermal charging
function. As the on-chip power dissipation and die temperature
increase, the ADP5065 charger monitors die temperature and
limits output current when the temperature reaches TLIM
(typically at 115°C). The die temperature is maintained at TLIM
through the control of the charging current into the battery. A
reduction in power dissipation or ambient temperature may
allow the charging current to return to its original value, and
the die temperature subsequently drops below TLIM. During
isothermal charging, the THERM_LIM flag is set to high.
Fault Recovery
Before performing the following operation, it is important to
ensure that the cause of the fault has been rectified.
BATTERY ISOLATION FET
The ADP5065 charger features an integrated battery isolation
FET for power path control. The battery isolation FET isolates a
deeply discharged Li-Ion cell from the system power supply in
both trickle and fast charge modes, thereby allowing the system
to be powered at all times.
When VINx is below VVIN_OK, the battery isolation FET is in full
conducting mode.
The battery isolation FET is off during trickle charge mode.
When the battery voltage exceeds VTRK, the battery isolation
FET switches to the system voltage regulation mode. During
system voltage regulation mode, the battery isolation FET
maintains the VISO_SFC voltage on the ISO_Sx pins. When the
battery voltage exceeds VISO_SFC, the battery isolation FET is in
full conducting mode.
The battery isolation FET supplements the battery to support
high current functions on the system power supply.
When voltage on ISO_Sx drops below ISO_Bx, the battery
isolation FET enters into full conducting mode.
When voltage on ISO_Sx rises above ISO_Bx, the isolation FET
enters regulating mode or full conduction mode, depending on the
Li-Ion cell voltage and the dc-to-dc charger mode.
Rev. D | Page 19 of 40
ADP5065
Data Sheet
BATTERY DETECTION
Battery (ISO_Bx) Short Detection
Battery Level Detection
A battery short occurs under a damaged battery condition or
when the battery protection circuitry is enabled.
The ADP5065 charger features a battery detection mechanism to
detect an absent battery. The charger actively sinks and sources
current into the ISO_Bx/BAT_SNS node, and voltage vs. time is
detected. The sink phase is used to detect a charged battery,
whereas the source phase is used to detect a discharged battery.
On commencing trickle charging, the ADP5065 charger monitors the battery voltage. If this battery voltage does not exceed
VBAT_SHR within the specified timeout period, tBAT_SHR, a fault is
declared and the charger is stopped by turning the battery
isolation FET off but the system voltage is maintained at
VISO_STRK by the linear regulator.
The sink phase (see Figure 32) sinks ISINK current from the
ISO_Bx/ BAT_SNS pins for a time, tBATOK. If the BAT_SNS pin is
below VBATL when the tBATOK timer expires, the charger assumes no
battery is present, and starts the source phase. If the BAT_SNS
exceeds the VBATL voltage when the tBATOK timer expires, the
charger assumes the battery is present, and begins a new charge
cycle.
The trickle charge branch is active during the battery short
scenario, and trickle charge current to the battery is maintained
until the 60 minute trickle charge mode timer expires.
After source phase, if the ISO_Bx or BAT_SNS level remains
below VBATH, either the battery voltage is low or the battery node
can be shorted. As a result of the battery voltage being low,
trickle charging mode is initiated (see Figure 33). If the
BAT_SNS level remains below VBAT_SHR after tBAT_SHR has elapsed,
the ADP5065 assumes that the battery node is shorted.
The source phase sources ISOURCE current to ISO_Bx or the
BAT_SNS pins for a time, tBATOK. If the BAT_SNS pin exceeds
VBATH before the tBATOK timer expires, the charger assumes that
no battery is present. If the BAT_SNS does not exceed the VBATH
voltage when the tBATOK timer expires, the charger assumes that a
battery is present, and begins a new charge cycle.
SOURCE PHASE
VBATL
LOGIC
STATUS
tBAT_OK
VBATH
ISOURCE
SINK PHASE
LOGIC
STATUS
tBAT_OK
OPEN
OR
SHORT
OPEN
ISO_Bx
09370-032
OPEN
OPEN
ISINK
ISO_Bx
Figure 32. Battery Detection Sequence
ISO_Bx
SHORT
OR
LOW
BATTERY
Figure 33. Battery Short Detection Sequence
Rev. D | Page 20 of 40
tBAT_SHR
SHORT
ISO_Bx
09370-033
tBAT_OK
LOGIC
STATUS
SHORT
ISO_Bx
OPEN
OR
SHORT
SHORT
ISINK
tBAT_OK
LOGIC
STATUS
SHORT
LOGIC
STATUS
TRICKLE CHARGE
VBAT_SHR
ITRK_DEAD
SOURCE PHASE
VBATH
VBATL
ISOURCE
SINK PHASE
Data Sheet
ADP5065
BATTERY PACK TEMPERATURE SENSING
Battery Thermistor Input
The ADP5065 charger features battery pack temperature
sensing that precludes charging when the battery pack
temperature is outside the specified range. The THR pin
provides an on and off switching current source, which should
be connected directly to the battery pack thermistor terminal.
The activation interval of the THR current source is 167 ms.
The battery pack temperature sensing can be controlled by
I2C using the conditions shown in Table 10. Note that the
I2C register default setting for EN_THR (Register 0x07) is
0 = temperature sensing off.
VISO_B
2.5 V
Don't care
The ADP5065 charger is designed for use with an NTC
thermistor in the battery pack with a nominal room temperature value of either 10 kΩ at 25°C or 100 kΩ at 25°C, which is
selected by a fuse.
The ADP5065 charger is designed for use with an NTC
thermistor in the battery pack with a temperature coefficient
curve (beta). Fuse-selectable beta programming is supported by
eight steps covering a range from 3150 to 4400 (see Table 34).
Table 10. THR Input Function
Conditions
VINx
Open or VIN = 0 V to 4.0 V
Open or VIN = 0 V to 4.0 V
4.0 V to 5.5 V
The ADP5065 charger monitors the voltage in the THR pin and
suspends charging if the current is outside the range of less than
0°C or greater than 60°C. For temperatures greater than 0°C,
the THR_STATUS register is set accordingly, and for temperatures
lower than 60°C, the THR_STATUS register is, likewise, set
accordingly.
THR Function
Off
Off, controlled by I2C
Always on
If the battery pack thermistor is not connected directly to the
ADP5065 THR pin, a 10 kΩ (tolerance ±20%) dummy resistor
must be connected between the THR input and GND. Leaving
the THR pin open results in a false detection of the battery
temperature being
