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ELECTRICAL CHARACTERISTICS

1

2

3

4

8

7

6

5

VC1

VC2

VC3

GND

OUT

VDD

CD

VC4

bq29400, bq29400A

bq29401, bq29405

SLUS568B – JULY 2003 – REVISED NOVEMBER 2004

over recommended operating free-air temperature range, T

(1)

PARAMETER

TEST CONDITION

MIN

NOM

MAX

UNIT

25

35

Over voltage detection accuracy

mV

25

50

bq29400

4.35

bq2940A

4.40

Over voltage detection

V

bq29401

4.45

bq29405

4.65

300

mV

V2, V3 , VC4 inputVC1 = VC2 = VC3 = VC4 = 3.5 V

Input current

±0.3

µA

(see Figure 1)

Over voltage detection delay time

CD = 0.22 µF

1.0

1.5

2.0

S

CD GND clamp current

CD = 1 V

5

12

µA

VC1 = VC2 = VC3 = VC4 = 3.5 V (see Figure 1)

2.0

3.0

Supply current

µA

VC1 = VC2 = VC3 = VC4 = 2.3 V (see Figure 1)

1.5

2.5

OUT pin drive voltage

VC1 = VC2 = VC3 = VC4 = 4.7 V, IOH = 0 mA

7

V

High-level output current

OUT = 3V, VC1 = VC2 = VC3 = VC4 = 4.7 V

–1

mA

Low-level output current

OUT = 0.1 V VC1 = VC3 = VC4 = 3.5 V

5

µA

(1)

Levels of the over-voltage detection and the hysteresis can be adjusted. For assistance contact Texas Instruments sales representative.

Terminal Functions

TERMINAL No.

DESCRIPTION

MSOP

TSSOP

NAME

(DTC)

(PW)

8

1

VC1

Sense voltage input for most positive cell

7

2

VC2

Sense voltage input for second most positive cell

6

3

VC3

Sense voltage input for third most positive cell

5

4

GND

Ground pin

4

5

VC4

Sense voltage input for least positive cell

3

6

CD

An external capacitor is connected to determine the programmable delay time

2

7

VDD

Power supply

1

8

OUT

Output

3