ISL94203IRTZ-T Intersil, ISL94203IRTZ-T Datasheet - Page 42

• Manufacturer Part Number: ISL94203IRTZ-T
• Description: Battery Management ISL94203IRTZ 3-to-8 Cell Li-ion Battery Pack Monitor, 48L 6x
• Manufacturer: Intersil
• Series: ISL94203r

Specifications of ISL94203IRTZ-T

• Rohs: yes
• Battery Type: Li-Ion
• Output Voltage: 2.6 V
• Output Current: 62 uA
• Operating Supply Voltage: 4 V to 36 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: TQFN-48
• Maximum Power Dissipation: 400 mW
• Mounting Style: SMD/SMT
• Operating Supply Current: 1 uA
• Product Type: Charge Management

Watchdog Timer
The I
from initiating an action that it cannot undo through the I
which can result in poor or unexpected operation of the pack.
The watchdog timer is normally inactive when operating the
device in a stand-alone operation. When the pack is expected to
have a µC along with the ISL94203, the WDT is activated by
setting any of the following bits:
µCSCAN, µCCMON, µCLMON, µCCBAL, µCFET, EEEN.
When active (an external µC is assumed to be connected), the
absence of I
2
C watchdog timer prevents an external microcontroller
2
C communications for the watchdog time-out
39Ω
39Ω
39Ω
39Ω
39Ω
39Ω
39Ω
39Ω
316kΩ
316kΩ
316kΩ
316kΩ
316kΩ
316kΩ
316kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
316kΩ
42
1kΩ
1kΩ
1kΩ
1kΩ
1kΩ
22nF
1kΩ
1kΩ
1kΩ
1kΩ
22nF
22nF
22nF
22nF
22nF
22nF
22nF
22nF
FIGURE 30. CELL BALANCE DRIVE CIRCUITS AND CELL CONNECTION OPTIONS
VC8
CB8
VC7
CB7
VC6
CB6
VC5
CB5
VC4
CB4
VC3
CB3
VC2
CB2
VC1
CB1
VC0
VSS
10V
10V
10V
10V
10V
10V
10V
10V
VSS
4M
4M
4M
4M
4M
4M
4M
4M
2
C port,
ISL94203
ISL94203
period causes a time-out event. The ISL94203 needs to see a
start bit and a valid slave byte to restart the timer.
The watchdog time-out signal turns off the cell balance and
power FET outputs, resets the serial interface, and pulses the INT
output once per second in an attempt to get the microcontroller
to respond. If the INT is unsuccessful in re-starting the
communication interface, the part operates normally, except the
power FETs and cell balance FETs are forced off. The ISL94203
remains in this condition until I
When I
µCLMON, µCFET, and EEEN bits are automatically cleared and
the µCCBAL bit remains set. The power FETs and cell balance
FETs turn on, if conditions allow.
2
C communication resumes, the µCSCAN, µCCMON,
2
C communications resumes.
CB5ON
CB4ON
CB3ON
CB2ON
CB1ON
CB8ON
CB7ON
CB6ON
CBAL_ON
ENABLE
December 5, 2012
FN7626.2