bq2057, bq2057C

bq2057T, bq2057W

SLUS025F − MAY 2001 − REVISED JULY 2002

6

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electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted) (continued)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

CURRENT REGULATION

bq2057 and bq2057C,

High-side current sensing configuration

95.4

105

115.5

V(SNS)

Current regulation

bq2057T and bq2057W,

High-side current sensing configuration

113.6

125

137.5

mV

V(SNS)

Current regulation

threshold

bq2057 and bq2057C,

Low-side current sensing configuration

100

110

121

mV

bq2057T and bq2057W,

Low-side current sensing configuration

118.1

130

143

CHARGE TERMINATION DETECTION

I(TERM)

Charge termination

current detect

threshold

Voltage at pin SNS, relative to VCC for high-side

sensing, and to Vss for low-side sensing,

0

°C ≤ TA ≤ 50°C

−24

−14

−4

mV

TEMPERATURE COMPARATOR

V(TS1)

Lower temperature

threshold

TS pin voltage

29.1

30

30.9

%VCC

V(TS2)

Upper temperature

threshold

TS pin voltage

58.3

60

61.8

%VCC

PRECHARGE COMPARATOR

bq2057

2.94

3

3.06

V(min)

Precharge

bq2057C

3.04

3.1

3.16

V

V(min)

Precharge

threshold

bq2057T

5.98

6.1

6.22

V

threshold

bq2057W

6.18

6.3

6.43

PRECHARGE CURRENT REGULATION

I(PRECHG)

Precharge current

regulation

Voltage at pin SNS, relative to VCC for high-side

sensing, and to VSS for low-side sensing,

0

°C ≤ TA ≤ 50°C

13

mV

I(PRECHG) regulation

Voltage at pin SNS, relative to VCC for high-side

sensing, 0

°C ≤ TA ≤ 50°C, VCC = 5 V

3

13

22

mV

VRCH COMPARATOR (Battery Recharge Threshold)

V(RCH)

Recharge

bq2057 and bq2057C

VO(REG)−

98 mV

VO(REG)−

100 mV

VO(REG)−

102 mV

V

V(RCH)

Recharge

threshold

bq2057T and bq2057W

VO(REG)−

196 mV

VO(REG)−

200 mV

VO(REG)−

204 mV

V

CHARGE-RATE COMPENSATION (AutoComp)

G(COMP)

AutoComp gain

V(BAT)+0.3 V≤ VCC ≤ VCC(max), bq2057, bq2057C,

bq2057T, bq2057W

1.87

2.2

2.53

V/V

G(COMP)

AutoComp gain

V(BAT)+0.3 V ≤ VCC ≤ VCC(max), bq2057T and

bq2057W in low-side sensing configuration

2.09

2.4

2.76

V/V

STAT PIN

VOL(STAT)

Output (low)

voltage

IOL = 10 mA

0.7

V

VOH(STAT)

Output (high)

voltage

IOH = 5 mA

VCC-0.5

V

CC PIN

VOL(CC)

Output low voltage

IO(CC) = 5 mA (sink)

1.5

V

IO(CC)

Sink current

Not to exceed power rating specification (PD)

5

40

mA