bq24901

SLUS527 – DECEMBER 2002

3

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ELECTRICAL CHARACTERISTICS

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

ICC(VCC)

Input current

VCC > VCC(min)

2

mA

IIB(BAT)

Input bias current on BAT pin

VI(BAT) > VO(REG), when not in charge

1

IIB(TS)

Input bias current on TS pin

VI(TS) = 2.5 V

1

A

IIB(SNS)

Input bias current on SNS pin

VCC = 6 V,

VI(SNS) = 6 V when not in charge

1

µA

IIB(TADJ)

Input bias current on TADJ pin

VI(TADJ) = VREF

1

BATTERY VOLTAGE and VCC REGULATION

VO(REG)

Output voltage

0

°C ≤ TA ≤ 70°C

4.17

4.20

4.23

V

VCC

Supply voltage

5.8

6.0

6.3

V

CURRENT REGULATION

V(SNS)

Current regulation threshold

voltage

Voltage at pin SNS relative to BAT,

0

°C ≤ TA ≤ 70°C, V(LOWV)≤V(SNS)≤VO(REG)

184

200

216

mV

Input common mode range on

SNS pin

V(UVT)

VCC

V

PRE-CHARGE AND SHORT-CIRCUIT CURRENT REGULATION

Pre-charge voltage threshold

Voltage at pin SNS relative to BAT pin,

0

°C ≤

TA ≤ 70°C

V(UVT) ≤ VI(BAT) ≤ V(LOWV)

10

20

30

mV

ISC

Short-circuit current

0

°C ≤ TA ≤ 70°C, 0 ≤ VI(BAT) ≤ V(UVT)

5.4

30.0

mA

CHARGE TERMINATION DETECTION

V

Charge termination current detect

Voltage at pin SNS relative to BAT pin,

0

°C ≤ TA ≤ 70°C

TADJ pin tied to VREF pin,

VI(SNS) = VO(REG)VI(BAT) > V(RCH)

16

20

24

mV

V(ITERM)

Charge termination current detect

threshold

Voltage at pin SNS relative to BAT pin,

0

°C ≤ TA ≤ 70°C

TADJ pin tied to VSS pin,

VI(SNS) = VO(REG)VI(BAT) > V(RCH)

7.5

10.0

12.5

mV

V(EN-TERM) Enable termination voltage

above threshold

VO(REG)

–210

VO(REG)

– 160

VO(REG)

– 110

V

t(TRMDET2)

Falling-edge delay for termination

detection

VI(BAT) > V(EN–TERM),

100 ns fall time

2 mV overdrive

100

µs

t(TRMDET1)

Rising-edge delay for termination

detection

VI(BAT) > V(EN–TERM),

100 ns fall time

2 mV overdrive

20

ms

TEMPERATURE COMPARATOR

V(LTF)

Cold temperature threshold voltage

VTS,

VCC ≥ 3.5 V

72.6

73.5

74.1

V(HTF)

Hot temperature threshold voltage

VTS,

VCC ≥ 3.5 V

33.7

34.4

35.1

%V

V(TCO)

Cutoff temperature threshold voltage

VTS,

VCC ≥ 3.5 V

28.7

29.3

29.9

%VCC

LTF hysteresis

Hysteresis for LTF threshold voltage

0.1

0.6

1.1

LOW BATTERY VOLTAGE (LOWV) THRESHOLD COMPARATOR

V(LOWV)

3.00

3.05

3.15

V

(1)

Ensured by design. Not production tested.