isl9212 Intersil Corporation, isl9212 Datasheet - Page 3

• Manufacturer Part Number: isl9212
• Description: Charging System Safety Circuit
• Manufacturer: Intersil Corporation

Pin Descriptions
VIN (Pins 1, 2)
The input power source. The VIN can withstand 30V input.
GND (Pin 3)
System ground reference.
WRN (Pin 4)
WRN is an open-drain logic output that turns LOW when any
protection event occurs.
NC (Pins 5, 6, 12)
No connection and must be left floating.
EN (Pin 7)
Enable input. Pull this pin to low or leave it floating to enable
the IC and force it to high to disable the IC.
Typical Applications
Block Diagram
INPUT
R
INPUT
C
ILIM
1
VIN
VIN
ILIM
GND
R
R
1
2
ISL9212
WRN
3
1.2V
PRE-REG
WRN
OUT
POR
REF
VB
EN
Q
CP1
4
GND
CHARGER
BATTERY
ISL6292
DRIVER
R
VB
FET
BATTERY
LOGIC
FIGURE 1. BLOCK DIAGRAM
PACK
Q
5
Q
ISL9212
Q
+
2
1
CP2
R
5
CP3
VB (Pin 8)
Battery voltage monitoring input. This pin is connected to the
battery pack positive terminal via an isolation resistor.
ILIM (Pin 9)
Overcurrent protection threshold setting pin. Connect a
resistor between this pin and GND to set the OCP threshold.
OUT (Pins 10, 11)
Output pin.
EPAD
The exposed pad at the bottom of the DFN package for
enhancing thermal performance. Must be electrically
connected to the GND pin.
EN
EA
Q
3
PART
R
R
R
C1
4
0.8V
ILIM
VB
R
3
BUF
25kΩ
200kΩ to 1MΩ
1µF/16V X5R ceramic capacitor
OUT
ILIM
VB
DESCRIPTION
R
R
CHARGER
BATTERY
VB
ISL6292
ILIM
+
May 8, 2006
FN9280.1