ISL6292B Datasheet, PDF (4/12 Pages) Intersil Corporation – Li-ion/Li Polymer Battery Charger

ISL6292B
Pin Description
VIN
VIN is the input power source. Connect to a wall adapter.
RED, GRN
RED and GRN are two open-drain outputs to drive a red and
a green LED in the same package. The RED and the GRN
pins are guaranteed to be capable of sinking at least 5mA
current.
TIME
The TIME pin determines the oscillation period by
connecting a timing capacitor between this pin and GND.
The oscillator provides a time reference for the charger.
GND
GND is the connection to system ground.
V2P9
This is a 2.9V untrimmed voltage output. This pin outputs a
2.9V voltage source when the input voltage is above POR
threshold, independent on the EN pin input. The V2P9 pin
can be used as an indication for adapter presence.
Typical Application
EN
EN is the enable logic input. Connect the EN pin to LOW to
enable the charger or leave it floating to disable the charger.
This pin is pulled up to 2.9V when left floating.
IREF
This is the programming input for the constant charging
current in a linear charger. In the typical application of a
dual-mode charger, the IREF pin programs the trickle charge
current as well as the protection current level.
IMIN
IMIN is the programmable input for the end-of-charge
current.
TEMP
TEMP is the input for an external NTC thermistor.
DT
DT is the input to set the temperature difference before and
after the charging starts. This pin can also be used as an
indication whether or not the charger is charging.
VSEN
VSEN is the battery voltage sensing input. This pin allows
remote sense of the battery pack voltage.
BAT
BAT is the charger output.
Input
C₁
C₂
D₂
R₁
R_T
D₁
R_S
R₅
R₄
R₂
VIN
V2P9
TEMP
DT
RED
GRN
GND
BAT
VSEN
EN
To Battery
C₃
R₃
C₄
B AT +
B AT -
ID
T IM E
IREF
IM IN
C_{TIM E}
R_IREF
R _IMIN
C₁, C₃: 1µF X5R ceramic capacitor
C₂, C₄: 0.1µF X5R ceramic capacitor
C_TIME : 22nF X5R or better timing capacitor
D₁, D₂: dual-color (red and green) LED in one package
R_IREF : 80kΩ, 1%
R_IMIN : 133kΩ, 1%
R₁: 41.2kΩ, 1%
R₂: TBD, value dependent on the ∆T (2.3kΩ for 20°C)
R_T: ECTH-160808-103-J-3800HT, 10kΩ at 25°C, 5%
R_S: 1.33kΩ, 1%
R₃: 10kΩ, 5% (R₃ and C₄ are for improving ESD protection)
R₄, R₅: 330Ω, 5%
4
FN9139 .1
April 19, 2005