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ELECTRICAL CHARACTERISTICS

V1

V2

V3

V4

VC4

OUT

VDD

CD

GND

VC1

VC2

VC3

8

7

6

5

1

2

4

3

bq29400, bq29400A

bq29401, bq29405

SLUS568C – JULY 2003 – REVISED SEPTEMBER 2005

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

Over voltage detection

300

mV

V2, V3 , VC4 input = VC1–VC2 = VC2–VC3 = VC3–VC4

Input current

0.3

µA

= VC4–GND = 3.5 V

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 = VC2–VC3 = VC3–VC4 = VC4–GND = 3.5 V

2.0

3.0

(see Figure 1)

Supply current

µA

VC1 = VC2 = VC3 = VC4 = VC3–VC4 = VC4–GND = 2.3

1.5

2.5

V (see Figure 1)

VC1–VC2 = VC2–VC3 = VC3–VC4 = VC4–GND =

7

V

OUT pin drive voltage

1.5

2.0

2.5

V

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

High-level output current

–1

mA

VC4–GND = 4.7 V

OUT = 0.1 V VC1–VC2 = VC2–VC3 = VC3–VC4 =

Low-level output current

5

µA

VC4–GND = 3.5 V

(1)

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

Terminal Functions

TERMINAL

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

Not Recommended for New Designs:

bq29400, bq29400A, bq29405