ISL9217 Intersil Corporation, ISL9217 Datasheet - Page 18

• Manufacturer Part Number: ISL9217
• Description: (ISL9216 / ISL9217) 8 to 12 Cell Li-Ion Battery Overcurrent Protection and Analog Front End Chip Set
• Manufacturer: Intersil Corporation

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Configuration Registers
The device is configured for specific application requirements using the Configuration Registers. The configuration register
consists of SRAM memory. This memory is powered by the RGO output. In a sleep condition, an internal switch powers the
contents of these registers from the VCELL1 input.
OCDV1
SCDV1
OCDT1
Bit 7
Bit 6
Bit 4
Bit 3
Bit 1
0
0
1
1
0
0
1
1
0
0
1
1
DENOCD
Turn off automatic OCD control
(ISL9216 only)
Bit 5
OCDV0
0
1
0
1
DENSCD
Turn off automatic SCD control
(ISL9216 only)
Bit 2
SCDV0
0
1
0
1
Bit 0
OCDT0
0
1
0
1
SETTING
18
TABLE 7. DISCHARGE SET CONFIGURATION REGISTER (ADDR: 05H)
When set to ‘0’, a discharge overcurrent condition automatically turns off the FETs.
When set to ‘1’, a discharge overcurrent condition will not automatically turn off the FETs.
In either case, this condition sets the DOC bit, which also turns on the TEMP3V output.
Discharge Overcurrent Threshold
(ISL9216 only)
V
V
V
V
When set to ‘0’, a discharge short circuit condition turns off the FETs.
When set to ‘1’, a discharge short circuit condition will not automatically turn off the FETs.
In either case, the condition sets the SCD bit, which also turns on the TEMP3V output.
Discharge Short Circuit Threshold
(ISL9216 only)
V
V
V
V
Discharge Overcurrent Time-out
(ISL9216 only)
t
t
t
t
OCD
OCD
OCD
OCD
OCD
OCD
OCD
OCD
SCD
SCD
SCD
SCD
ISL9216, ISL9217
= 160ms (2.5ms if DTDIV = 1)
= 320ms (5ms if DTDIV = 1)
= 640ms (8ms if DTDIV = 1)
= 1280ms (16ms if DTDIV = 1)
= 0.20V
= 0.35V
= 0.65V
= 1.20V
= 0.10V
= 0.12V
= 0.14V
= 0.16V
FUNCTION
November 2, 2007
FN6488.1