Datasheet

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RECOMMENDED OPERATING CONDITIONS
bq29312A
SLUS629A – JANUARY 2005 – REVISED AUGUST 2005
MIN NOM MAX UNIT
Supply Voltage (BAT or PACK) 4.5
(1)
25 V
V
I(STARTUP)
Start-up voltage (PACK) 5.0 V
VC1, VC2, VC3, VC4 0 BAT
SR1, SR2 –0.5 0.5
VC5 –0.5 3.0
V
I
Input voltage range V
VCn – VC(n+1), (n = 1, 2, 3, 4 ) 0 5.0
PMS 0 PACK
SLEEP 0 REG
V
IH
0.8 × REG REG V
Logic level input voltage SCLK, SDATA, WDI
V
IL
0 0.2 × REG
V
IH
V
(PACK)
– 0.2 V
(PACK)
V
PMS logic level PMS
V
IL
0 0.2
PMS pullup/pulldown resistance RPMS 100 1000 k Ω
V
O
Output voltage OD 25 V
I
O
Output current XALERT, SDATA 200 µA
CELL ±10 µA
Input current,
I
I
SLEEP -0.5 1.0 µA
External 3.3-V REG capacitor
C
(REG)
4.7 µF
R
(CELL)
100 Ω
Extend CELL output filter
C
(CELL)
100 nF
OD 1 mA
I
OL
Input frequency
WDI 32.768 kHz
WDI high time 2 28 µs
T
A
Operating temperature –40 85 °C
(1) V
(PACK)
supply voltage must rise above start-up voltage on power up to enable the internal regulator which drives REG and TOUT as
required. Once V
(PACK)
is above the start-up voltage, it can fall down to the minimum supply voltage and still meet the specifications of
the bq29312A.
3