BQ24035RHLT datasheet(5/38 Pages) TI

Part #	BQ24035RHLT

Description	SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC (bqTINY)

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Manufacturer	TI [Texas Instruments]

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bq24030, bq24031, bq24032A

bq24035, bq24038

SLUS618F – AUGUST 2004 – REVISED NOVEMBER 2006

ELECTRICAL CHARACTERISTICS (continued)

over junction temperature range (0°C

≤ T

J ≤ 125°C) and the recommended supply voltage range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

OUT PIN – FET (Q1, Q3, AND Q2) DROP-OUT VOLTAGE (RDSon)

VI(AC)≥ VCC(min), PSEL = High,

V(ACDO)

AC to OUT dropout voltage(5)

300

475

II(AC) = 1 A, (IO(OUT)+ IO(BAT)), or no AC

VI(USB)≥ VCC(min), PSEL = Low,

ISET2 = High, II(USB) = 0.4 A,

140

180

mV

(IO(OUT)+IO(BAT)), or no AC

V(USBDO)(6)

USB to OUT dropout voltage

VI(USB)≥ VCC(min), PSEL = Low,

ISET2 = Low, II(USB) = 0.08 A,

28

36

(IO(OUT)+ IO(BAT))

BAT to OUT dropout voltage

V(BATDO)

VI (BAT)≥ 3 V, Ii(BAT)= 1.0 A, VCC < Vi(BAT)

40

100

mV

(discharging)

OUT PIN - BATTERY SUPPLEMENT MODE

Enter battery supplement mode

VI(OUT)

VBSUP1

(battery supplements OUT current

VI(BAT)> 2 V

≤ V

I(BAT)

in the presence of input source

– 60 mV

V

VI(OUT)

VBSUP2

Exit battery supplement mode

VI(BAT)> 2 V

≥ V

I(BAT)

– 20 mV

OUT PIN - SHORT CIRCUIT

Current source between BAT to OUT for

IOSH1

BAT to OUT short-circuit recovery

short-circuit recovery to

10

mA

VI(OUT)≤ VI(BAT) –200 mV

RSHAC

AC to OUT short-circuit limit

VI(OUT) ≤ 1 V

500

Ω

RSHVSB

USB to OUT short-circuit limit

VI(OUT) ≤ 1 V

500

BAT PIN CHARGING – PRECHARGE

Precharge to fast-charge transition

V(LOWV)

Voltage on BAT

2.9

3

3.1

V

threshold

Deglitch time for fast-charge to

tFALL = 100 ns, 10 mV overdrive,

TDGL(F)

22.5

ms

precharge transition(7)

VI(BAT) decreasing below threshold

1 V < VI(BAT) < V(LOWV), t < t(PRECHG),

IO(PRECHG)

Precharge range

10

150

mA

IO(PRECHG) = (K(SET) × V(PRECHG))/ RSET

V(PRECHG)

Precharge set voltage

1 V < VI(BAT) < V(LOWV), t < t(PRECHG)

230

250

270

mV

BAT PIN CHARGING - CURRENT REGULATION

Vi (BAT) > V(LOWV), VI(OUT) - VI (BAT) >

AC battery charge current range

V(DO-MAX), PSEL = High

IO(BAT)

100

1000

1500

mA

(8)

IOUT(BAT) = (K(SET) × V(SET) / RSET),

VI(OUT) > VO(OUT-REG) + V(DO-MAX)

RPBAT

BAT to OUT pullup

Vi (BAT)< 1 V

1000

Ω

AC to OUT and USB to OUT

RPOUT

VI(OUT) < 1 V

500

short-circuit pullup

Voltage on ISET1, VVCC≥ 4.35 V,

Battery charge current set

V(SET)

VI(OUT)- VI(BAT) > V(DO-MAX),

2.475

2.500

2.525

V

voltage(9)

VI(BAT) > V(LOWV)

100 mA

≤ I

O(BAT) ≤ 1 A

400

425

450

K(SET)

Charge current set factor, BAT

10 mA

≤ I

O(BAT) ≤ 100 mA

(10)

300

450

600

(5)

VDO(max), dropout voltage is a function of the FET, RDS(on), and drain current. The dropout voltage increases proportionally to the

increase in current.

(6)

RDS(on) of USB FET Q3 is calculated by: (VUSB – VOUT) / (IOUT + IBAT) when II(USB) ≤ II(USB-MIN) (FET fully on, not in regulation).

(7)

All deglitch periods are a function of the timer setting and is modified in DPPM or thermal regulation modes by the percentages that the

program current is reduced.

(8)

When input current remains below 2 A, the battery charging current may be raised until the thermal regulation limits the charge current.

(9)

For half-charge rate, V(SET) is 1.25 V ± 25 mV for bq24032A/38 only.

(10) Specification is for monitoring charge current via the ISET1 pin during voltage regulation mode, not for a reduced fast-charge level.

5

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