BQ24086 datasheet(4/34 Pages) TI

Part #	BQ24086

Description	750 mA SINGLE-CHIP Li-Ion/Li-Pol CHARGE MANAGEMENT IC WITH THERMAL REGULATION

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Manufacturer	TI [Texas Instruments]

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4 / 34 page

ELECTRICAL CHARACTERISTICS (Continued)

mA

kW

Volts

bq24085, bq24086

bq24087, bq24088

SLUS784B – DECEMBER 2007 – REVISED MAY 2008 .................................................................................................................................................... www.ti.com

over recommended operating, TJ = 0°C–125°C range, See the Application Circuits section, typical values at TJ = 25°C (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOLTAGE REGULATION, V(IN) ≥ VO(REG) + V(DO-MAX), I(TERM) < I(OUT) < IO(OUT), CHARGER ENABLED, NO FAULT CONDITIONS

DETECTED

VO(REG)

Output voltage

4.20

V

TA = 25°C

–0.5%

0.5%

VO(TOL)

Voltage regulation accuracy

–1%

1%

V(DO)

Dropout voltage, V(IN) – V(OUT)

I(OUT) = 750 mA

600

mV

CURRENT REGULATION , V(IN) > V(OUT) > V(DO-MAX), CHARGER ENABLED, NO FAULT CONDITIONS DETECTED

V(BAT) > V(LOWV), IO(OUT) = I(OUT) = K(SET) ×

IO(OUT)

Output current range

50

750

mA

V(SET)/R(SET)

V(SET)

Output current set voltage

V(ISET) = V(SET), V(LOWV) < V(BAT) ≤ VO(REG)

2.45

2.5

2.55

V

100 mA

≤ IO(OUT) ≤ 750 mA

175

182

190

K(SET)

Output current set factor

10 mA

≤ IO(OUT) < 100 mA

180

215

250

RISET

External resistor range

Resistor connected to ISET pin

0.6

10

k

Ω

VOLTAGE AND CURRENT REGULATION TIMING, V(IN) > V(OUT) + V(DO-MAX), CHARGER ENABLED, NO FAULT CONDITIONS

DETECTED, RTMR = 50K or V(TMR) = OPEN; Thermal regulation loop not active

Input power detection to full

Measured from PG:HI

→ LO to I(OUT) > 100 mA,

tPWRUP(CHG)

25

ms

charge current time delay

CE = LO, IO(OUT) = 750 mA, V(BAT) = 3.5 V

Measured from CE:HI

→ LO to I(OUT) >100 mA,

Charge enable to full charge

tPWRUP(EN)

IO(OUT) = 750 mA, V(BAT)= 3.5 V, V(IN) = 4.5 V, Input

25

ms

current delay

power detected

Measured from PG:HI

→ LO to V(OUT) > 90% of

Input power detection to voltage

charge voltage regulation;

tPWRUP(LDO)

regulation delay, LDO mode set,

25

ms

V(TMR) = OPEN, LDO mode set, no battery and no

no battery or load connected

load at OUT pin, CE = LO

PRECHARGE AND OUTPUT SHORT-CIRCUIT CURRENT REGULATION, V(IN)–V(OUT) > V(DO-MAX) , V(IN)

≥ 4.5V, CHARGER

ENABLED, NO FAULT CONDITIONS DETECTED, RTMR = 50K or V(TMR)=OPEN; Thermal regulation loop not active

Precharge to fast-charge

V(LOWV)

V(BAT) increasing

2.8

2.95

3.15

V

transition threshold

Precharge to short-circuit

V(SC)

V(BAT) decreasing

1.2

1.4

1.6

transition threshold

V

V(SCIND)

Short-circuit indication

V(BAT) decreasing

1.6

1.8

2

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

IO(PRECHG)

Precharge current range

5

75

mA

IO(PRECHG) = K(SET) × V(PRECHG)/R(ISET)

V(ISET) = V(PRECHG), V(SC) < VI(BAT) < V(LOWV),

V(PRECHG)

Precharge set voltage

225

250

280

mV

t < t(PRECHG)

VSS ≤ V(BAT) ≤ V(SCI),

VPOR < VIN < 6.0 V

7

15

24

IO(SHORT) = I(OUT), V(BAT)=

IO(SHORT)

Output shorted regulation current

mA

VSS, Internal pullup resistor,

6.0 V < VIN < VOVP

15

TJ = 25°C

TEMPERATURE REGULATION (Thermal regulation™), CHARGER ENABLED, NO FAULT CONDITIONS DETECTED

V(IN) = 5.5 V, V(BAT) = 3.2 V, Fast charge current

TJ(REG)

Temperature regulation limit

101

112

125

°C

set to 1A

V(LOWV) < V(BAT) < VO(REG),

Minimum current in thermal

I(MIN_TJ(REG))

105

125

mA

regulation

0.7k

Ω < R(ISET) < 1.18kΩ

4

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Product Folder Link(s): bq24085, bq24086 bq24087, bq24088

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