bq24901

SLUS527 – DECEMBER 2002

4

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ELECTRICAL CHARACTERISTICS (continued)

Over recommended operating free-air temperature and supply voltage (unless otherwise noted)

PARAMETER

UNIT

MAX

TYP

MIN

TEST CONDITIONS

BATTERY RECHARGE THRESHOLD (VRCH) COMPARATOR

V(RCH)

Recharge threshold voltage

VO(REG)

– 0.24

VO(REG)

– 0.12

V

POWER-ON RESET (POR)

V(POR)

POR threshold voltage

2.60

2.70

2.85

V

TIMERS

t(PRECHG) Precharge time

VI(BAT) < V(LOWV)

1,350

1,800

2,250

t(CHG)

Charge time

V(LOWV) < VI(BAT) < VO(REG),

13,500

18,000

22,500

s

OPTO-DRIVER PIN (OPTD)

VSAT(OPTD) Output saturation voltage

IO(OPTD) = 10 mA

100

mV

I(OPTDLKG) Opto-driver leakage current

V(OPTD) = 5 V,

VI(BAT) < VO(REG)

VCC = 5.8 V,

100

µA

gM

Transconductance

IO(OPTD) = 5 mA

5

500

S

Gain-bandwidth product

IO(OPTD) = 5 mA, RLOAD = 100 Ω

1

MHz

DISCHARGE CURRENT, DISCHARGE VOLTAGE, CONDITION CURRENT AND WAKE CURRENT

I(DISCHG)

Discharge current

1 V

≤ VI(BAT) ≤ 4.2 V

60

300

800

µA

t(DISCHG1) Discharge time 1

250

310

370

ms

t(DISCHG2) Discharge time 2

20

25

30

ms

V(DISCHG) Discharge voltage(1)

1.5

2.0

2.5

V

I

Batter detection c rrent

I(DETECT_min) at VCC = 5.8 V,VI(BAT) = 4.2 V

0.8

I(DETECT)

Battery detection current

I(DETECT_max) at VCC = 6 V, VI(BAT) = 0 V

30

mA

I

Wake current source 1

I(WK_SRC_min) at VCC = 5.8 V,VI(BAT) = 4.2 V

0.8

mA

I(WK_SRC) Wake current, source 1

I(WK_SRC_max) at VCC = 6 V,VI(BAT) = 0 V

30

I

Wake c rrent so rce 2

I(WK_SINK_min) at VCC = 5.8 V,VI(BAT) = 4.2 V

0

A

I(WK_SINK) Wake current, source 2

I(WK_SINK_max) at VCC = 6 V,VI(BAT) = 0 V

1000

µA

t(WK)

Wake time

100

125

150

ms

CHARGE STATUS OUTPUT (STAT1/STAT2)

VOL(STATx) Low-level output saturation voltage

IO(STATx) = 10 mA, VCC ≥ 3.5 V

0.5

V

VOLTAGE REFERENCE OUTPUT (VREF)

VREF voltage threshold

0 V < IO(VREF) < 500 µA,

0

°C ≤ TA ≤ 70°C

1.18

1.22

V

CHARGE CONTROL OUTPUT (CC)

VOL

Low-level output voltage (FstChg)

IO(CC) = 40 mA (sink)

0.45

V

COUT

Output capacitance

LDO to BAT,

LDO to VSS

0.1

10.0

µF

UNDERVOLTAGE THRESHOLD SHORT-CIRCUIT PROTECTION

V(UVT)

Undervoltage threshold voltage

2.00

2.15

V

(1)

Ensured by design. Not production tested.