BQ24087DRCT datasheet(7/42 Pages) TI1

Part #	BQ24087DRCT

Description	750-mA Single-Chip Li-Ion and Li-Pol Charge Management IC With Thermal Regulation

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Manufacturer	TI1 [Texas Instruments]

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bq24085, bq24086, bq24087, bq24088

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SLUS784E – DECEMBER 2007 – REVISED DECEMBER 2015

Electrical Characteristics (continued)

over recommended operating range, TJ = 0 –125°C range, See the Application and Implementation section, typical values at

TJ = 25°C (unless otherwise noted), RTMR = 49.9 KΩ

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

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

PRECHARGE AND OUTPUT SHORT-CIRCUIT CURRENT REGULATION(6)

Precharge to fast-charge transition

V(LOWV)

V(BAT) increasing

2.8

2.95

3.15

V

threshold

Precharge to short-circuit transition

V(SC)

V(BAT) decreasing

1.2

1.4

1.6

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)

VPOR < VIN <

VSS ≤ V(BAT) ≤ V(SCI),

7

15

24

6.0 V

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

IO(SHORT)

Output shorted regulation current

mA

Internal pullup resistor,

6.0 V < VIN <

15

TJ = 25°C

VOVP

TEMPERATURE REGULATION (Thermal regulation™)(7)

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

TJ(REG)

Temperature regulation limit

101

112

125

°C

set to 1 A

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

I(MIN_TJ(REG))

Minimum current in thermal regulation

105

125

mA

0.7 k

Ω < R(ISET) < 1.18 kΩ

CHARGE TERMINATION DETECTION(8)

I(TERM)

Termination detection current range

V(BAT) > V(RCH), I(TERM) = K(SET) × V(TERM)/R(ISET)

5

75

mA

Charge termination detection set

V(TERM)

V(BAT) > V(RCH)

225

250

275

mV

voltage(9)

BATTERY RECHARGE THRESHOLD

V(RCH)

Recharge threshold detection

[VO(REG)–V(BAT) ] > V(RCH)

75

100

135

mV

TIMERS(10)

Charge timer and termination enable

Charge timer AND termination

bq24085/86/88

threshold

disabled at: V(TMR) > VTMR(OFF)

VTMR(OFF)

2.5

3

3.5

V

Charge timer disabled at:

Charge timer enable threshold

bq24087

V(TMR) > VTMR(OFF)

BATTERY DETECTION THRESHOLDS

IDET(DOWN)

Battery detection current (sink)

2 V < V(BAT) < VO(REG)

1

2

3.2

mA

IO(PR

IDET(UP)

Battery detection current (source)

2 V < V(BAT) < VO(REG)

mA

ECHG)

TIMER FAULT RECOVERY

I(FAULT)

Fault Current (source)

V(OUT) < V(RCH)

0.8

1.1

mA

OUTPUT CURRENT SAFETY LIMIT(11)

I(SETSC)

Charge overcurrent safety

V(ISET) = VSS

1.5

A

(6)

V(IN)–V(OUT) > V(DO-MAX) , V(IN)

≥ 4.5 V, charger enabled, no fault conditions detected, RTMR = 50 K or V(TMR)=OPEN; thermal

regulation loop not active.

(7)

Charger enabled, no fault conditions detected.

(8)

VO(REG) = 4.2 V, charger enabled, no fault conditions detected, thermal regulation loop not active, RTMR = 50 K or TMR pin open.

(9)

The voltage on the ISET pin is compared to the V(TERM) voltage to determine when the termination should occur.

(10) CE = LO, charger enabled, no fault conditions detected, V(TMR) < 3 V, timers enabled.

(11) V(IN) ≥ 4.5 V, charger enabled, ISET shorted to GND.

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