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®
Data Sheet
January 4, 2006
ISL6293
FN9180.1
Li-ion/Li Polymer Battery Charger
Accepting Two Power Sources
The ISL6293 is a fully integrated low-cost single-cell Li-ion or
Li-polymer battery charger. The charger accepts two power
inputs, normally one from a USB (Universal Serial Bus) port
and another one from a desktop cradle. The ISL6293 is an
ideal charger for smart handheld devices that need to
communicate with a personal computer via USB.
The ISL6293 features 28V and 7V maximum voltages for the
cradle and the USB inputs respectively. The 28V rating
allows low-cost adapters be safely used. When both inputs
are powered, the cradle input is used to charge the battery.
The charge current is independently programmable for both
inputs with two small resistors. One additional USBP pin
allows the selection of high-power or low-power port for the
USB input. The charger is self-protected against over
temperature. If the die temperature rises above 100°C, a
thermal foldback function reduces the charge current
automatically to prevent further temperature rise. The
charger preconditions the battery with low current when the
battery voltage is below 2.6V. The charger has two indication
pins. The PPR (power present) pin outputs an open-drain
logic LOW when either the cradle or the USB input power is
attached. The CHG (charge) pin is also an open-drain output
that indicates a logic LOW when the charge current is above
a minimum current level. When the charge current is below
the minimum current, the charger remains in operation but
the CHG pin indicates a logic HIGH signal.
Ordering Information
TEMP.
PART RANGE
PART NUMBER MARKING (°C)
PACKAGE
PKG.
DWG. #
ISL6293-2CR
93-2
-40 to 85 10 Ld 3x3 DFN L10.3x3
ISL6293-2CR-T 93-2
10 Ld 3x3 DFN Tape and Reel
ISL6293-2CRZ
(Note)
932Z
-40 to 85 10 Ld 3x3 DFN L10.3x3
(Pb-free)
ISL6293-2CRZ-T 932Z
(Note)
10 Ld 3x3 DFN Tape and Reel
(Pb-free)
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are 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.
Features
• Complete Charger for Single-Cell Li-ion/Polymer Batteries
• Accept Two Power Sources
• Low Component Count
- Integrated Pass Element
- Integrated Charge-Current Sensor with 10% Accuracy
- No External Blocking Diode Required
• Charge Current Thermal Foldback for Thermal
Protection
• 28V Maximum Voltage for the Cradle Input
• Charge Indication
• Adapter Presence Indication
• Less than 1µA Leakage Current off the Battery when No
Input Power Attached
• Ambient Temperature Range: -40°C to 85°C
• Thermally-Enhanced 3x3 DFN Package
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Smart Handheld Devices
• Cell Phones, PDAs, MP3 Players
• Digital Still Cameras
• Handheld Test Equipment
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
Pinout
ISL6293-2
(10 LD 3X3 DFN)
TOP VIEW
CRDL 1
USB 2
PPR 3
CHG 4
EN 5
10 BAT
9 ICDL
8 GND
7 USBP
6 IUSB
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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Block Diagram
CRDL
USB
ISL6293
BAT
Temp
Monitor
CPPR
ICDL
IUSB
USBP
PPR
CHG
Reference
Current
Control
IR
CPPR
USB CRDL BAT
LBAT
Control
+
VA
-
VREF
ENA
EN
GND
2 FN9180.1
January 4, 2006

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ISL6293
Typical Applications
A Simple Charger Accepting Power from Both a USB Port and a Desktop Cradle
To Cradle
Connector
To USB C1
Connector
R1
C2
500mA
100mA
CRDL
USB
USBP
BAT
ICDL
IUSB
PPR
CHG
EN
GND
RICDL
RIUSB
R2
D1
Disable
Enable
To Battery
C3
R3
D2
RICDL
RIUSB
R2, R3
C1, C2, C3
R1
D1, D2
COMPONENT SELECTION
1.82kfor 0.8A cradle charge current
80kfor 100mA/500mA USB charge current
470
1µF ceramic capacitor
1
LEDs
A Simple Charger with Programmable Charge Current and Wide Input Voltage Range
To Cradle
Connector
C1
Disable
Enable
USB
BAT
ICDL
CRDL
IUSB
ISL6293-2
USBP
PPR
CHG
EN GND
To Battery
RICDL
C2
COMPONENT SELECTION
RICDL
1.82kfor 0.8A cradle charge current
C1, C2
1µF ceramic capacitor
RIUSB is not required when the USB input of ISL6293-2 is left
floating in the design for a single input charger.
3 FN9180.1
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ISL6293
Absolute Maximum Ratings
Supply Voltage (USB) . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
Supply Voltage (CRDL) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 28V
Signal Input Voltage (EN, USBP, ICDL, IUSB, BAT) . . . . -0.3V to 7V
Open-Drain Pull-Up Voltage (PPR, CHG) . . . . . . . . . . . . -0.3V to 7V
Recommended Operating Conditions
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . .-40°C to 85°C
Supply Voltage (USB Pin) . . . . . . . . . . . . . . . . . . . . . . 4.3V to 5.5V
Supply Voltage (CRDL Pin) . . . . . . . . . . . . . . . . . . . . . . 4.3V to 24V
Typical Cradle Charge Current . . . . . . . . . . . . . . . . . . 300mA to 1A
Typical USB Charge Current . . . . . . . . . . . . . . . . 350mA to 450mA
Thermal Information
Thermal Resistance
θJA (°C/W) θJC (°C/W)
3x3 DFN Package (Notes 1, 2) . . . . . .
46
4
Maximum Junction Temperature (Plastic Package) . . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. θJA 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. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications Typical Values Are Tested at USB = CRDL = 5V and ambient temperature is at 25°C, Unless Otherwise Noted.
All Maximum and Minimum Values Are Guaranteed Under the Recommended Operating Conditions.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
POWER-ON RESET
Rising USB/CRDL Threshold
3.4 3.7 4.0
V
Falling USB/CRDL Threshold
3.2 3.5 3.8
V
VIN-BAT OFFSET VOLTAGE
Rising Edge
Falling Edge
STANDBY CURRENT
VOS
VOS
VBAT = 4.0V, use CHG pin to indicate the
comparator output (Note 3)
175 mV
110 mV
BAT Pin Sink Current
CRDL Pin Supply Current
USB Pin Supply Current
CRDL/USB Pin Supply Current
ISTANDBY EN = HIGH or both inputs are floating
ICRDL EN = HIGH
IUSB
EN = LOW or floating
1.0
150
150 250
0.55
µA
µA
µA
mA
VOLTAGE REGULATION
Output Voltage (Note 4)
CRDL PMOS On Resistance
USB PMOS On Resistance
CHARGE CURRENT (Note 5)
VCH
Charge current = 20mA
VBAT = 3.8V, ICHARGER = 0.5A
VBAT = 3.8V, ICHARGER = 0.35A
4.158 4.2 4.242
V
700 m
700 m
ICDL Pin Output Voltage
IUSB Pin Output Voltage
CRDL Input Constant Charge Current
VICDL VBAT = 3.8V
VIUSB
ICHARGE RICDL = 1.82k, VBAT = 3.8V
Valid for -10°C to 85°C
1.17
0.776
720
1.20
0.8
800
1.23
0.824
880
V
V
mA
CRDL Input Trickle Charge Current
ITRICKLE RICDL = 1.82k, VBAT = 2.4V
Given as a percentage of the CRDL ICHARGE
Valid for -10°C to 85°C
9.2
13.2 17.2
%
USB Input Constant Charge Current
USB Input Trickle Charge Current (Note 4)
ICHARGE USBP = HIGH, RIUSB = 80k, VBAT = 3.8V
ITRICKLE USBP = HIGH, RIUSB = 80k, VBAT = 2.4V
Given as a percentage of the USB HIGH
ICHARGE
380 440 500
8.0 10.0 12.0
mA
%
4 FN9180.1
January 4, 2006

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ISL6293
Electrical Specifications Typical Values Are Tested at USB = CRDL = 5V and ambient temperature is at 25°C, Unless Otherwise Noted.
All Maximum and Minimum Values Are Guaranteed Under the Recommended Operating Conditions. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
USB Input Constant Charge Current
ICHARGE USBP = LOW, RIUSB = 80k, VBAT = 3.8V
USB Input Trickle Charge Current
ITRICKLE
USBP = LOW, RIUSB = 80k, VBAT = 2.4V
Given as a percentage of the USB LOW
ICHARGE
END-OF-CHARGE CURRENT THRESHOLD
68 84 100
45.0 50.0 55.0
mA
%
Powered From USB Pin
IEOC
Powered From USB Pin
IEOC
Powered From CRDL Pin
IEOC
PRECONDITIONING CHARGE THRESHOLD
USBP = HIGH, RIUSB = 80k
Given as a percentage of the USB HIGH
ICHARGE
USBP = LOW, RIUSB = 80k
Given as a percentage of the USB LOW
ICHARGE
RICDL = 1.82k,
Given as a percentage of the CRDL ICHARGE
8.0
17.0
5.5
10.5
21.0
8.5
13.0
25.0
11.0
%
%
%
Preconditioning Charge Threshold Voltage
INTERNAL TEMPERATURE MONITORING
VMIN
2.5 2.6 2.7
V
Current Foldback Threshold (Note 5)
LOGIC INPUT AND OUTPUT
TFOLD
85 100 115 °C
USBP Pin Logic Input High
2.0 V
USBP Pin Logic Input Low
0.4 V
USBP Pin Internal Pull Down Resistance
1000
k
EN Pin Logic Input High
1.2 V
EN Pin Logic Input Low
0.4 V
EN Pin Internal Pull Down Resistance
1000
k
CHG/PPR Sink Current
Pin Voltage = 0.8V
15 mA
NOTES:
3. The 4.0V VBAT is selected so that the CHG output can be used as the indication for the offset comparator output indication. If the VBAT is lower
than the POR threshold, no output pin can be used for indication.
4. The maximum and minimum limits are guaranteed over -40°C to 70°C ambient temperature range.
5. The charge current may be reduced by the thermal foldback function, depending on the heatsinking condition of the test setup.
6. The threshold value at which the charger output is reduced to near zero. Guaranteed by characterization or correlation to other test.
Functional Pin Description
CRDL (Pin 1)
Cradle input. This pin is usually connected to a cradle power
input. The maximum input voltage is 28V. The charge
current from this pin is programmable with the ICDL pin up to
1A. When this pin is connected to a power source, no charge
current is drawn from the USB pin. A 1µF or larger value
ceramic capacitor is recommended for decoupling.
USB (Pin 2)
USB input. This pin is usually connected to a USB port
power connector. Other sources that are lower than 5.5V are
also acceptable. The charge current from the USB pin is
selectable between 100mA and 500mA maximum with the
USBP pin when the RIUSB = 80k. A 1µF or larger value
ceramic capacitor is recommended for decoupling. It is also
recommended to have a 1resistor in series with the
decoupling capacitor to prevent an over-shoot voltage when
a USB hot plug event occurs.
PPR (Pin 3)
Power presence indication. This is an open-drain output pin
that outputs a logic LOW when either the USB input voltage
or the CRDL input voltage is above its POR level, regardless
if the charger is enabled or disabled. This pin provides a
wake-up signal to a microprocessor when either the cradle
or the USB power is connected.
5 FN9180.1
January 4, 2006