bq24700, bq24701

NOTEBOOK PC BATTERY CHARGE CONTROLLER

AND SELECTOR WITH DPM

SLUS452B – APRIL 2001 – REVISED NOVEMBER 2002

9

POST OFFICE BOX 655303

otherwise specified) (continued)

MOSFET gate drive

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

AC driver RDS(on) high

VCC = 18 V

150

250

Ω

AC driver RDS(on) low

VCC = 18 V

60

120

Ω

Battery driver RDS(on) high

VCC = 18 V

200

370

Ω

Battery driver RDS(on) low

VCC = 18 V

100

170

Ω

tDa

Time delay from ac driver off to battery driver on

ACSEL 2.4 V

⇓ 0.2 V

0.5

1.5

µs

tDb

Time delay from battery driver off to ac driver on

ACSEL 0.2 V

⇑ 2.4 V

1.0

2.0

µs

V

PWM driver high level output voltage

IOUT = –10 mA, VCC = 18 V

–0.12

–0.07

V

VOH

PWM driver high-level output voltage

IOUT = –100 mA, VCC = 18 V

–1.2

–0.7

V

PWM driver RDS(on) high

7

14

Ω

V

PWM dri er lo

le el o tp t oltage

IOUT = 10 mA,

VCC = 18 V

VHSP+0.04 VHSP+0.1

V

VOL

PWM driver low-level output voltage

IOUT = 100 mA, VCC = 18 V

VHSP+0.5 VHSP+0.9

V

PWM driver RDS(on) low

4

8

Ω

selector

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VACPRES

AC presence detect voltage

See Note 9

1.165

1.220

1.275

V

VIT(ACPRES) AC presence hysteresis

40

80

120

mV

td(ALMON)

ACSEL high to alarm set high in ac fault time delay

ACSEL 0.2 V

⇑ 2.4 V

5

10

µs

td(ALMOFF)

ACSEL low to alarm reset low in ac fault time delay

SRN = SRP = 8 V,

ACSEL 2.4 V

⇓ 0.2 V

2

10

µs

VBATDEP

Battery depletion ALARM trip voltage

See Note 8

1.165

1.220

1.275

V

VNOBAT

No battery detect, switch to ACDRV

See Note 8

0.87

0.98

1.07

V

tBATSEL

Battery select time (ACSEL low to BATDRV low)

VS < BATP,

ACSEL 2.4 V

⇓ 0.2 V

0.2

3.0

µs

tACSEL

AC select time (ACSEL high to ACDRV low)

ACSEL 0.2 V

⇑ 2.4 V

0.2

3.0

µs

VVS

VS voltage to enable BATDRV

BATP = 1 V

0.96

1.02

V

VIT(VS)

VS voltage hysteresis

VS > BATP

30

110

mV

NOTES: 8. Refer to Table 1 to determine the logic operation of the bq24700 and the bq24701.

9. Maximum ac adapter voltage (VCC) and AC presence detect voltage are 18 V.