BQ29312ARTHR datasheet(5/39 Pages) TI1

Part #	BQ29312ARTHR

Description	FOUR-CELL LITHIUM-ION

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ELECTRICAL CHARACTERISTICS (Continued)

bq29312A

SLUS629A – JANUARY 2005 – REVISED AUGUST 2005

T

A = 25°C, C(REG) = 4.7 µF, BAT = 14 V (unless otherwise noted)

PARAMETER

TEST CONDITION

MIN

NOM

MAX

UNIT

OVERLOAD (OL) AND SHORT-CIRCUIT (SC) DETECTION

VOL

OL detection threshold range, typical(1)

–50

–205

mV

∆V

OL

OL detection threshold program step

5

mV

VHYS(OL)

OL detection threshold hysteresis

7

10

13

mV

Charge

100

475

V(SC)

SC detection threshold range, typical(2)

mV

Discharge

–100

–475

Charge

25

∆V

(SC)

SC detection threshold program step

mV

Discharge

–25

VHYS(SC)

SC detection threshold hysteresis

Charge and Discharge

40

50

60

mV

VOL = 50 mV (min)

40

50

60

V(OL_acr)

OL detection threshold accuracy(1)

Discharge

VOL = 100 mV

90

100

110

mV

VOL = 205 mV (max)

184

205

226

VSC = 100 mV (min)

80

100

120

V(SC_acr)

SC detection threshold accuracy(2)

Charge and Discharge

VSC = 200 mV

180

200

220

mV

VSC = 475 mV (max)

426

475

523

FET DRIVE CIRCUIT

V(FETOND)= V(BAT)– V(DSG)VGS connect 1 MΩ

BAT= 20 V

12

15

18

Output voltage, charge, and discharge

V(FETON)

V

FETs on

V(FETONC)=V(PACK)– V(CHG)VGS connect 1 MΩ PACK = 20 V

12

15

18

V(ZCHG)

ZVCHG clamp voltage

PACK= 4.5 V

3.3

3.5

3.7

V

V(FETOFF)= V(PACK)– V(DSG)

PACK= 16 V

0.2

Output voltage, charge and discharge

V(FETOFF)

V

FETs off

V(FETOFF)=V(BAT)– V(CHG)

BAT = 16 V

0.2

VDSG :10%–90%

40

200

tr

Rise time

CL = 4700 pF

µs

VCHG :10%–90%

40

200

VDSG :90%–10%

40

200

tf

Fall time

CL = 4700 pF

µs

VCHG :90%–10%

40

200

THERMISTOR DRIVE

IO = –1 mA at TOUT pin, rds(ON) = (VREG– VO (TOUT))/1 mA,

rDS(on)

TOUT pass-element series resistance

50

100

Ω

TA = –25°C to 85°C

LOGIC

XALERT

TA = –25°C to 85°C

60

100

200

R(PUP)

Internal pullup resistance

k

Ω

SDATA, SCLK,

TA = –25°C to 85°C

6

10

20

XALERT, IO = 200 µA,

TA = –25°C to 85°C

0.2

VOL

Logic level output voltage

SDATA, IO = 50 µA,

TA = –25°C to 85°C

0.4

V

OD IO=1 mA,

TA = –25°C to 85°C

0.6

(1)

See OL register for setting detection threshold

(2)

See SC register for setting detection threshold

5

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