bq294705 datasheet(7/27 Pages) TI1

Part #	bq294705

Description	Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries with External Delay Capacitor

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bq2947

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SLUSB15F – SEPTEMBER 2012 – REVISED JANUARY 2017

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Electrical Characteristics (continued)

Typical values stated where TA = 25°C and VDD = 14.4 V, MIN/MAX values stated where TA = –40°C to +110°C and VDD = 3

V to 20 V (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

OUTPUT DRIVE OUT, CMOS ACTIVE HIGH VERSIONS ONLY

VOUT

Output Drive Voltage,

Active High

(V4–V3), (V3–V2), (V2–V1), or (V1–VSS) > VOV,

VDD = 14.4 V, IOH = 100 µA

6

V

If three of four cells are short circuited, only one

cell remains powered and > VOV, VDD = Vx (cell

voltage), IOH = 100 µA

VDD – 0.3

V

(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < VOV,

VDD = 14.4 V, IOL = 100 µA measured into OUT

pin.

250

400

mV

IOUTH

OUT Source Current

(during OV)

(V4–V3), (V3–V2), (V2–V1), or (V1–VSS) > VOV,

VDD = 14.4 V,

OUT = 0 V, measured out of OUT pin.

4.5

mA

IOUTL

OUT Sink Current (no

OV)

(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < VOV,

VDD = 14.4 V,

OUT = VDD, measured into OUT pin .Pull resistor

RPU = 5 kΩ to VDD = 14.4 V

0.5

14

mA

OUTPUT DRIVE OUT, CMOS OPEN DRAIN ACTIVE LOW VERSIONS ONLY

VOUT

Output Drive Voltage,

Active High

(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < VOV,

VDD = 14.4 V, IOL = 100 µA measured into OUT

pin.

250

400

mV

IOUTL

OUT Sink Current (no

OV)

(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < VOV,

VDD = 14.4 V,

OUT = VDD, measured into OUT pin. Pull resistor

RPU = 5 kΩ to VDD = 14.4 V

0.5

14

mA

IOUTLK

OUT pin leakage

(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < VOV,

VDD = 14.4 V,

OUT = VDD, measured into OUT pin.

100

nA

DELAY TIMER

tCD

OV Delay Time

CCD = 0.1 µF (see Equation 1)

1

1.5

2

s

tCD_GND

OV Delay Time with CD

pin = 0 V

Delay due to CCD capacitor shorted to ground for

Customer Test Mode

20

170

ms

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