ISL6298-2CR3 Datasheet, PDF (7/17 Pages) Intersil Corporation – Li-ion/Li-Polymer Battery Charger

ISL6298
Pin Description
VIN (Pin 1, 15, 16 for 4x4; Pin 1 for 3x3)
VIN is the input power source. Connect to a wall adapter.
Fault (Pin 2)
FAULT is an open-drain output indicating fault status. This
pin is pulled to LOW under any fault conditions.
Status (Pin 3)
STATUS is an open-drain output indicating charging and
inhibit states. The STATUS pin is pulled LOW when the
charger is charging a battery.
Time (Pin 4)
The TIME pin determines the oscillation period by
connecting a timing capacitor between this pin and GND.
The oscillator also provides a time reference for the charger.
GND (Pin 5)
GND is the connection to system ground.
TOEN (Pin 6 for 4x4; N/A for 3x3)
TOEN is the TIMEOUT enable input pin. Pulling this pin to
LOW disables the TIMEOUT function. Leaving this pin HIGH
or floating enables the TIMEOUT limit. For the 3x3 DFN
package, this pin is left floating internally.
EN (Pin 7 for 4x4; Pin 6 for 3x3)
EN is the enable logic input. Connect the EN pin to LOW to
disable the charger or leave it floating to enable the charger.
V2P8 (Pin 8 for 4x4; Pin 7 for 3x3)
This is a 2.8V reference voltage output. This pin outputs a
2.8V voltage source when the input voltage is above POR
threshold and outputs zero otherwise. The V2P8 pin can be
used as an indication for adapter presence.
IREF (Pin 9 for 4x4; Pin 8 for 3x3)
This is the programming input for the constant charging
current.
IMIN (Pin 10 for 4x4; N/A for 3x3)
IMIN is the programmable input for the end-of-charge
current. For the 3x3 DFN package, this pin is shorted to the
V2P8 pin internally.
TEMP (Pin 11 for 4x4; Pin 9 for 3x3)
TEMP is the input for an external NTC thermistor. The TEMP
pin is also used for battery removal detection.
VBAT (Pin 12, 13, 14 for 4x4; Pin 10 for 3x3)
VBAT is the connection to the battery. Typically a 10µF
Tantalum capacitor is needed for stability when there is no
battery attached. When a battery is attached, only a 1µF
ceramic capacitor is required.
Typical Applications
4x4 QFN Package Options
5V Wall
Adapter
1µF
C₁
VIN
VBAT
500 Ω
R₁
D₁
1µF
C₃
500 Ω
R₂
D₂
TOEN
ISL6298
TEMP
FAULT
STATUS ^IREF
EN
V2P8
TIME
IMIN
GND
C_TIME
15nF
1µ F
C₂ ^V2P8
R_{U RT}
T
R _IMIN
80kΩ
R_IREF
80kΩ
Battery
Pack
FIGURE 16. TYPICAL APPLICATION CIRCUIT FOR THE 4x4 QFN PACKAGE OPTIONS
7
FN9173.3
July 20, 2005