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ISL6292
Li-ion/Li Polymer Battery Charger
The ISL6292 is an integrated single-cell Li-ion or Li-polymer
battery charger capable of operating with an input voltage as
low as 2.4V. This charger is designed to work with various
types of AC adapters or a USB port.
The ISL6292 operates as a linear charger when the AC
adapter is a voltage source. The battery is charged in a
CC/CV (constant current/constant voltage) profile. The
charge current is programmable with an external resistor up
to 2A. The ISL6292 can also work with a current-limited
adapter to minimize the thermal dissipation, in which case,
the ISL6292 combines the benefits of both a linear charger
and a pulse charger.
The ISL6292 features charge current thermal foldback to
guarantee safe operation when the printed circuit board is
space limited for thermal dissipation. Additional features
include preconditioning of an over-discharged battery, an
NTC thermistor interface for charging the battery in a safe
temperature range, automatic recharge, and thermally
enhanced QFN or DFN packages.
Pinouts
ISL6292
(16 LD QFN)
TOP VIEW
16 15 14 13
VIN 1
12 VBAT
FAULT 2
STATUS 3
11 TEMP
10 IMIN
TIME 4
9 IREF
5678
ISL6292
(10 LD DFN)
TOP VIEW
VIN 1
FAULT
STATUS
TIME
2
3
4
GND 5
10 VBAT
9 TEMP
8 IREF
7 V2P8
6 EN
DATASHEET
FN9105
Rev.9.00
December 17, 2007
Features
• Complete Charger for Single-Cell Li-ion Batteries
• Very Low Thermal Dissipation
• Integrated Pass Element and Current Sensor
• No External Blocking Diode Required
• 1% Voltage Accuracy
• Programmable Current Limit up to 2A
• Programmable End-of-Charge Current
• Charge Current Thermal Foldback
• NTC Thermistor Interface for Battery Temperature Monitor
• Accepts Multiple Types of Adapters or USB BUS Power
• Guaranteed to Operate at 2.65V After Start-Up
• Ambient Temperature Range: -20°C to +70°C
• Thermally-Enhanced QFN Packages
• Handheld Devices, including Medical Handhelds
• PDAs, Cell Phones and Smart Phones
• Portable Instruments, MP3 Players
• Self-Charging Battery Packs
• Stand-Alone Chargers
• USB Bus-Powered Chargers
• Pb-Free Available (RoHS Compliant)
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Technical Brief TB379 “Thermal Characterization of
Packaged Semiconductor Devices”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
FN9105 Rev.9.00
December 17, 2007
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ISL6292
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL6292-1CR3*
92-1
-20 to +70
10 Ld 3x3 DFN
L10.3x3
ISL6292-1CR3Z* (Note)
921Z
-20 to +70
10 Ld 3x3 DFN (Pb-free)
L10.3x3
ISL6292-2CR3*
92-2
-20 to +70
10 Ld 3x3 DFN
L10.3x3
ISL6292-2CR3Z* (Note)
922Z
-20 to +70
10 Ld 3x3 DFN (Pb-free)
L10.3x3
ISL6292-1CR4*
629 2-1CR4
-20 to +70
16 Ld 4x4 QFN
L16.4x4
ISL6292-1CR4Z* (Note)
629 21CR4Z
-20 to +70
16 Ld 4x4 QFN (Pb-free)
L16.4x4
ISL6292-2CR4*
629 2-2CR4
-20 to +70
16 Ld 4x4 QFN
L16.4x4
ISL6292-2CR4Z* (Note)
629 22CR4Z
-20 to +70
16 Ld 4x4 QFN (Pb-free)
L16.4x4
ISL6292-1CR5*
629 2-1CR5
-20 to +70
16 Ld 5x5 QFN
L16.5x5B
ISL6292-1CR5Z* (Note)
6292-1CR5Z
-20 to +70
16 Ld 5x5 QFN (Pb-free)
L16.5x5B
ISL6292-2CR5*
629 2-2CR5
-20 to +70
16 Ld 5x5 QFN
L16.5x5B
ISL6292-2CR5Z* (Note)
6292-2CR5Z
-20 to +70
16 Ld 5x5 QFN (Pb-free)
L16.5x5B
ISL6292EVAL1Z
Evaluation Board for the 3x3 DFN Package Part
ISL6292EVAL2
Evaluation Board for the 4x4 QFN Package Part
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and 100%
matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations.
Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J
STD-020.
FN9105 Rev.9.00
December 17, 2007
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ISL6292
Absolute Maximum Ratings
Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
Output Pin Voltage (BAT). . . . . . . . . . . . . . . . . . . . . . . -0.3V to 5.5V
Signal Input Voltage (TOEN, TIME, IREF, IMIN) . . . . . -0.3V to 3.2V
Output Pin Voltage (STATUS, FAULT) . . . . . . . . . . . . . . . -0.3V to 7V
Charge Current (For 4x4 or 5x5 QFN Packages) . . . . . . . . . . . 2.1A
Charge Current (For 3x3 DFN Package) . . . . . . . . . . . . . . . . . 1.6A
Recommended Operating Conditions
Ambient Temperature Range . . . . . . . . . . . . . . . . . . .-20°C to +70°C
Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3V to 6.5V
Thermal Information
Thermal Resistance (Junction to Ambient) JA (°C/W) JC (°C/W)
5x5 QFN Package (Notes 1, 2) . . . . . .
34
4
4x4 QFN Package (Notes 1, 2) . . . . . .
41
4
3x3 DFN Package (Notes 1, 2) . . . . . .
46
4
Maximum Junction Temperature (Plastic Package) . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
1. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2. JC, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief TB379.
Electrical Specifications
Typical values are tested at VIN = 5V and +25°C Ambient Temperature, maximum and minimum values are
guaranteed over 0°C to +70°C Ambient Temperature with a supply voltage in the range of 4.3V to 6.5V, unless
otherwise noted.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
POWER-ON RESET
Rising VIN Threshold
3.0 3.4 4.0
V
Falling VIN Threshold
2.11 2.4 2.65
V
STANDBY CURRENT
VBAT Pin Sink Current
VIN Pin Supply Current
VIN Pin Supply Current
VOLTAGE REGULATION
ISTANDBY
IVIN
IVIN
VIN floating or EN = LOW
VBAT floating and EN pulled low
VBAT floating and EN floating
- - 3.0 µA
- 30 - µA
- 1 - mA
Output Voltage
Output Voltage
Dropout Voltage
VCH
VCH
ISL6292-1
4.059 4.10 4.141
ISL6292-2
4.158 4.20 4.242
VBAT = 3.7V, 0.5A, 4x4 or 5x5 package
-
140
-
V
V
mV
Dropout Voltage
VBAT = 3.7V, 0.5A, 3x3 package
- 175 - mV
CHARGE CURRENT
Constant Charge Current
Trickle Charge Current
Constant Charge Current
Trickle Charge Current
Constant Charge Current
Trickle Charge Current
End-of-Charge Threshold
RECHARGE THRESHOLD
ICHARGE
ITRICKLE
ICHARGE
ITRICKLE
ICHARGE
ITRICKLE
RIREF = 80k, VBAT = 3.7V
RIREF = 80k, VBAT = 2.0V
IREF Pin Voltage > 1.2V, VBAT = 3.7V
IREF Pin Voltage > 1.2V, VBAT = 2.0V
IREF Pin Voltage < 0.4V, VBAT = 3.7V
IREF Pin Voltage < 0.4V, VBAT = 2.0V
RIMIN = 80k
0.9 1.0 1.1
- 110 -
400 450 520
- 45 -
- - 100
- 10 -
85 110 135
A
mA
mA
mA
mA
mA
mA
Recharge Voltage Threshold
Recharge Voltage Threshold
VRECHRG
VRECHRG
ISL6292-2
ISL6292-1
- 4.0 -
- 3.90 -
V
V
FN9105 Rev.9.00
December 17, 2007
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ISL6292
Electrical Specifications
Typical values are tested at VIN = 5V and +25°C Ambient Temperature, maximum and minimum values are
guaranteed over 0°C to +70°C Ambient Temperature with a supply voltage in the range of 4.3V to 6.5V, unless
otherwise noted. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
TRICKLE CHARGE THRESHOLD
Trickle Charge Threshold Voltage
TEMPERATURE MONITORING
VMIN
2.7 2.8 3.0
V
Low Battery Temperature Threshold
High Battery Temperature Threshold
Battery Removal Threshold
Charge Current Foldback Threshold
Current Foldback Gain
OSCILLATOR
VTMIN
VTMAX
VRMV
TFOLD
GFOLD
V2P8 = 3.0V
V2P8 = 3.0V
V2P8 = 3.0V
1.45 1.51 1.57
V
0.36 0.38 0.40
V
- 2.25 -
V
85 100 115 °C
- 100 - mA/°C
Oscillation Period
LOGIC INPUT AND OUTPUT
tOSC
CTIME = 15nF
2.4 3.0 3.6 ms
TOEN Input High
2.0 - - V
TOEN and EN Input Low
- - 0.8 V
IREF and IMIN Input High
1.2 - - V
IREF and IMIN Input Low
- - 0.4 V
STATUS/FAULT Sink Current
Pin Voltage = 0.8V
5 - - mA
Typical Operating Performance The test conditions for the Typical Operating Performance are: VIN = 5V, TA = +25°C,
RIREF = RIMIN = 80k, VBAT = 3.7V, Unless Otherwise Noted.
4.2015
4.2010
4.2005
4.2000
RIREF = 40k
4.1995
4.1990
4.1985
4.1980
4.1975
0
0.3 0.6 0.9 1.2 1.5
CHARGE CURRENT (A)
FIGURE 1. CHARGER OUTPUT VOLTAGE vs CHARGE
CURRENT
4.210
4.208
4.206
CHARGE CURRENT = 50mA
4.204
4.202
4.200
4.198
4.196
4.194
4.192
4.190
0
20 40 60 80 100 120
TEMPERATURE (°C)
FIGURE 2. CHARGER OUTPUT VOLTAGE vs TEMPERATURE
FN9105 Rev.9.00
December 17, 2007
Page 4 of 20

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ISL6292
Typical Operating Performance The test conditions for the Typical Operating Performance are: VIN = 5V, TA = +25°C,
RIREF = RIMIN = 80k, VBAT = 3.7V, Unless Otherwise Noted. (Continued)
4.30
4.25
CHARGE CURRENT = 50mA
4.20
4.15
4.10
4.2 4.5 4.8 5.1 5.4 5.7
6.0 6.3
VIN (V)
FIGURE 3. CHARGER OUTPUT VOLTAGE vs INPUT
VOLTAGE CHARGE CURRENT = 50mA
2.0
2A
1.8
1.6
1.5A
1.4
1.2
1.0 1A
0.8
0.6 0.5A
0.4 USB500
0.2
USB100
0
3.0 3.2 3.4 3.6 3.8
4.0
VBAT (V)
FIGURE 4. CHARGE CURRENT vs OUTPUT VOLTAGE
1.6
1.4 1.5A
1.2
1.0
1.0A
0.8
0.6
0.4 0.5A
0.2
0.0
0
20 40 60 80 100 120
TEMPERATURE (°C)
FIGURE 5. CHARGE CURRENT vs AMBIENT TEMPERATURE
2.0
1.8
1.6
1.4
1.5A
1.2
2A
1.0
1A
0.8
0.6 0.5A
0.4
0.2 USB100
USB500
0
4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1 6.3 6.5
VIN (V)
FIGURE 6. CHARGE CURRENT vs INPUT VOLTAGE
2.930
2.928
V2P8 PIN LOADED WITH 2mA
2.926
2.924
2.922
2.920
3.5 4.0 4.5 5.0 5.5 6.0 6.5
VIN (V)
FIGURE 7. V2P8 OUTPUT vs INPUT VOLTAGE
FN9105 Rev.9.00
December 17, 2007
3.00
2.95
2.90
2.85
2.80
2.75
2.70
0 2 4 6 8 10
V2P8 LOAD CURRENT (mA)
FIGURE 8. V2P8 OUTPUT vs ITS LOAD CURRENT
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