BQ294524 datasheet(6/26 Pages) TI1

Part #	BQ294524

Description	Overvoltage Protection For 2-Series and 3-Series Cell Li-Ion Batteries

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Manufacturer	TI1 [Texas Instruments]

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bq294502, bq294504, bq294512, bq294514

bq294515, bq294522, bq294524, bq294532

bq294533, bq294562, bq294572, bq294582, bq294592

SLUSAJ3F – SEPTEMBER 2011 – REVISED JUNE 2017

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Specified by design. Not 100% tested in production.

7.5 Electrical Characteristics

Typical values stated where TA = 25°C and VDD = 10.8 V, MIN/MAX values stated where TA = –40°C to +110°C and VDD =

3 V to 15 V (unless otherwise noted).

TEST NO.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOLTAGE PROTECTION THRESHOLD VCx

1.0

VOV

V(PROTECT) –

Overvoltage

Detection

bq294502, fixed delay 4 s

4.35

V

1.1

bq294504, fixed delay 6.5 s

4.35

1.2

1.3

bq294512, fixed delay 4 s

4.4

1.4

bq294514, fixed delay 6.5 s

4.4

1.5

bq294515, fixed delay 4 s

4.425

1.6

bq294522, fixed delay 4 s

4.45

1.7

bq294524, fixed delay 6.5 s

4.45

1.8

bq294532, fixed delay 4 s

4.5

bq294533, fixed delay 6.5 s

4.5

1.9

bq294562, fixed delay 4 s

4.25

1.10

bq294572, fixed delay 4 s

4

1.11

bq294582, fixed delay 4 s

4.225

1.12

bq294584, fixed delay 6.5 s(1)

4.225

1.13

bq294592, fixed delay 4 s

4.3

1.14

VHYS

Overvoltage

Detection Hysteresis

VHYS

250

300

400

mV

1.15

VOA

OV Detection

Accuracy

TA = 25°C, bq2945xx

–10

10

mV

1.16

VOA –DRIFT

OV Detection

Accuracy due to

Temperature

TA = –40°C

TA = 0°C

TA = 60°C

TA = 110°C

–40

–20

–24

–54

44

20

24

54

SUPPLY AND LEAKAGE CURRENT

1.17

ICC

Supply Current

(V3–V2) = (V2–V1) = (V1–VSS) = 4 V (See

Figure 8 for reference)

1

2

µA

(V3–V2) = (V2–V1) = (V1–VSS) = 2.8 V with TA

= –40°C to 60°C

1.25

1.18

IIN

Input Current at Vx

Pins

Measured at V3, V2, and V1 = 4 V

(V2–V1) = (V1–VSS) = 4 V

TA = 0°C to 60°C (See Figure 8 for reference.)

–0.1

0.1

µA

OUTPUT DRIVE OUT

1.19

VOUT

Output Drive Voltage

(V3–V2) or (V2–V1) or (V1–VSS) > VOV

VDD = 7.2 V, IOH = 100 µA, TA = –40°C to

+110°C

6

V

1.20

Two of the three cells are short circuit and only

one cell is powered

(V3–V2) or (V2–V1) or (V1–VSS) > VOV

VDD = Vx (Cell voltage), IOH = 100 µA, TA =

–40°C to +110°C

VDD –

0.2

V

1.21

(V3–V2), (V2–V1), and (V1–VSS) < VOV, IOL =

100 µA, TA = 25°C

TA = –40°C to +110°C

250

400

mV

1.22

IOUT(Short)

OUT Short Circuit

Current

OUT = 0 V (V3–V2) or (V2–V1) or (V1–VSS) >

VOV

4.5

mA

1.23

tR

Output Rise Time

CL = 1 nF, VOH(OUT) = 0 V to 5 V

(2)

5

µs

1.24

ZO

Output Impedance

2

5

k

Ω

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