BQ24085_17 Datasheet, PDF(7/42 Page) Texas Instruments – 750-mA Single-Chip Li-Ion and Li-Pol Charge Management IC With Thermal Regulation

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BQ24085_17 Datasheet, PDF (7/42 Pages) Texas Instruments – 750-mA Single-Chip Li-Ion and Li-Pol Charge Management IC With Thermal Regulation

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www.ti.com

bq24085, bq24086, bq24087, bq24088

SLUS784E â DECEMBER 2007 â REVISED DECEMBER 2015

Electrical Characteristics (continued)

over recommended operating range, TJ = 0 â125Â°C range, See the Application and Implementation section, typical values at

TJ = 25Â°C (unless otherwise noted), RTMR = 49.9 Kâ¦

PARAMETER

TEST CONDITIONS

MIN TYP MAX UNIT

K(SET)

Output current set factor

100 mA â¤ IO(OUT) â¤ 750 mA

10 mA â¤ IO(OUT) < 100 mA

RISET

External resistor range

Resistor connected to ISET pin

PRECHARGE AND OUTPUT SHORT-CIRCUIT CURRENT REGULATION(6)

175 182 190

180 215 250

0.6

10 kâ¦

V(LOWV)

Precharge to fast-charge transition

threshold

V(BAT) increasing

2.8 2.95 3.15 V

V(SC)

Precharge to short-circuit transition

threshold

V(BAT) decreasing

V(SCIND)

Short-circuit indication

V(BAT) decreasing

IO(PRECHG)

Precharge current range

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

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

V(PRECHG)

Precharge set voltage

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

t < t(PRECHG)

IO(SHORT)

Output shorted regulation current

VSS â¤ V(BAT) â¤ V(SCI),

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

Internal pullup resistor,

TJ = 25Â°C

TEMPERATURE REGULATION (Thermal regulationâ¢)(7)

VPOR < VIN <

6.0 V

6.0 V < VIN <

VOVP

1.2 1.4 1.6

1.6 1.8

75 mA

225 250 280 mV

7 15 24

TJ(REG)

Temperature regulation limit

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

set to 1 A

101 112 125

Â°C

I(MIN_TJ(REG)) Minimum current in thermal regulation

CHARGE TERMINATION DETECTION(8)

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

0.7 kâ¦ < R(ISET) < 1.18 kâ¦

105 125 mA

I(TERM)

V(TERM)

Termination detection current range

Charge termination detection set

voltage (9)

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

V(BAT) > V(RCH)

75 mA

225 250 275 mV

BATTERY RECHARGE THRESHOLD

V(RCH)

TIMERS (10)

Recharge threshold detection

[VO(REG)âV(BAT) ] > V(RCH)

75 100 135 mV

VTMR(OFF)

Charge timer and termination enable

threshold

Charge timer enable threshold

Charge timer AND termination

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

Charge timer disabled at:

V(TMR) > VTMR(OFF)

bq24085/86/88

bq24087

2.5

3 3.5 V

BATTERY DETECTION THRESHOLDS

IDET(DOWN)

Battery detection current (sink)

IDET(UP)

Battery detection current (source)

TIMER FAULT RECOVERY

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

2 3.2 mA

IO(PR

ECHG)

I(FAULT)

Fault Current (source)

OUTPUT CURRENT SAFETY LIMIT(11)

V(OUT) < V(RCH)

0.8 1.1 mA

I(SETSC)

Charge overcurrent safety

V(ISET) = VSS

1.5

(6) V(IN)âV(OUT) > V(DO-MAX) , V(IN) â¥ 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) â¥ 4.5 V, charger enabled, ISET shorted to GND.

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