BQ29200_16 datasheet(14/24 Pages) TI1

Part #	BQ29200

Description	Voltage Protection with Automatic Cell Balance

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Manufacturer	TI1 [Texas Instruments]

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V

CELL

CB _EXT

I

bal

R

=

CELL2

1

2

OUT 8

VDD

7

CELL1

3

6

Q1

4 CD

GND

5

Q2

_

CB EN

PWR PAD

VC1_CB

VC1

VC2

RVD

RCB_EXT

CCD

CIN

CVD

PACK+

PACK±

RCLAMP

RIN

±6

±5

±4

±3

±2

±1

0

1

2

-40

0

25

60

110

Operating Temperature (

ƒC)

VC1 V(PROTECT)

VC2 V(PROTECT)

C001

14

bq29200, bq29209

SLUSA52C – SEPTEMBER 2010 – REVISED MARCH 2016

www.ti.com

Product Folder Links: bq29200 bq29209

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9.2.1.3 Application Curve

Figure 10. Average VPROTECT Accuracy (VOA) Across Operation Temperature

9.3 System Example

9.3.1 External Cell Balancing

Higher cell balancing currents can be supported by means of a simple external network, as shown in Figure 11.

Figure 11. External Cell Balancing Configuration

RCLAMP ensures that both Q1 and Q2 remain off when balancing is disabled, and should be sized above 2 kΩ to

prevent excessive internal device current when the balancing network is activated. RCB_EXT determines the value

of the balancing current, and is dependent on the voltage of the balanced cell, as follows:

10 Power Supply Recommendations

The recommended power supply for this device is a maximum 10-V operation on the VDD input pin.

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