BQ20Z95 datasheet(5/20 Pages) TI

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Recommended Operating Conditions

Electrical Characteristics

bq20z95

SLUS757 – JULY 2007

over operating free-air temperature range (unless otherwise noted)

PARAMETER

MIN

NOM

MAX

UNIT

VSS

Supply voltage

VCC, VBAT

4.5

V(STARTUP)

Minimum startup voltage

VCC, BAT, PACK

5.5

VC(n)-VC(n+1); n = 1,2,3,4

VC1, VC2, VC3, VC4

VSUP

VIN

Input Voltage Range

VC5

0.5

ASRN, ASRP

–0.5

0.5

PACK, PMS

V(GPOD)

Output Voltage Range

GPOD

A(GPOD)

Drain Current(1)

GPOD

C(REG25)

2.5V LDO Capacitor

REG25

µF

C(REG33)

3.3V LDO Capacitor

REG33

2.2

µF

C(VCELL+)

Cell Voltage Output Capacitor

VCELL+

0.1

µF

C(PACK)

PACK input block resistor(2)

PACK

Ω

(1)

Use an external resistor to limit the current to GPOD to 1mA in high voltage application.

(2)

Use an external resistor to limit the inrush current PACK pin required.

over operating free-air temperature range (unless otherwise noted), TA = –40°C to 85°C, V(REG25) = 2.41 V to 2.59 V, V(BAT) =

14 V, C(REG25) = 1 µF, C(REG33) = 2.2 µF; typical values at TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

I(NORMAL)

Firmware running

550

µA

I(SLEEP)

Sleep Mode

CHG FET on; DSG FET on

124

µA

CHG FET off; DSG FET on

µA

CHG FET off; DSG FET off

µA

I(SHUTDOWN)

Shutdown Mode

0.1

µA

SHUTDOWN WAKE; TA = 25°C (unless otherwise noted)

I(PACK)

Shutdown exit at VSTARTUP threshold

µA

SRx WAKE FROM SLEEP; TA = 25°C (unless otherwise noted)

Positive or negative wake threshold

V(WAKE)

with 1.00 mV, 2.25 mV, 4.5 mV and 9

1.25

mV programmable options

V(WAKE) = 1 mV;

-0.7

0.7

I(WAKE)= 0, RSNS1 = 0, RSNS0 = 1;

V(WAKE) = 2.25 mV;

I(WAKE) = 1, RSNS1 = 0, RSNS0 = 1;

-0.8

0.8

I(WAKE) = 0, RSNS1 = 1, RSNS0 = 0;

V(WAKE_ACR)

Accuracy of V(WAKE)

V(WAKE) = 4.5 mV;

I(WAKE) = 1, RSNS1 = 1, RSNS0 = 1;

-1.0

1.0

I(WAKE) = 0, RSNS1 = 1, RSNS0 = 0;

V(WAKE) = 9 mV;

-1.4

1.4

I(WAKE) = 1, RSNS1 = 1, RSNS0 = 1;

V(WAKE_TCO)

Temperature drift of V(WAKE) accuracy

0.5

°C

Time from application of current and

t(WAKE)

wake of bq8040

POWER-ON RESET

VIT–

Negative-going voltage input

Voltage at REG25 pin

1.70

1.80

1.90

Vhys

Hysteresis

VIT+ – VIT-

150

250

active low time after power up or

tRST

RESET active low time

100

250

560

µs

watchdog reset

WATCHDOG TIMER

tWDTINT

Watchdog start up detect time

250

500

1000

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