BQ294704DSGR datasheet(5/20 Pages) TI1

Part #	BQ294704DSGR

Description	Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries

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Manufacturer	TI1 [Texas Instruments]

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OUT

V4

V3

V1

V2

VSS

VDD

CD

PACK+

PACK–

RIN

CCD

CVD

RVD

VOV

8

7

9

1

2

3

4

5

6

PWPD

Enable

Active

Delay Charge/

Discharge Circuit

CIN

RIN

bq294700, bq294701, bq294702

bq294703, bq294704, bq294705

bq294707

www.ti.com

SLUSB15A – SEPTEMBER 2012 – REVISED SEPTEMBER 2013

To calculate the delay, use the following equation:

tCD (sec) = K × CCD (µF), where K = 10 to 20 range.

(1)

Example: If CCD= 0.1 µF (typical), then the delay timer range is

tCD (sec) = 10 × 0.1 = 1 s (Minimum)

tCD (sec) = 20 × 0.1 = 2 s (Maximum)

NOTE

The tolerance on the capacitor used for CCD increases the range of the tCD timer.

FUNCTIONAL BLOCK DIAGRAM

Figure 3 shows a CMOS Active High configuration.

Figure 3. Block Diagram

NOTE

In the case of an Open Drain Active Low configuration, an external pull-up resistor is

required on the OUT terminal.

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Product Folder Links: bq294700 bq294701 bq294702 bq294703 bq294704 bq294705 bq294707

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