TPS65721 datasheet(7/50 Pages) TI

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TPS65720

TPS65721

www.ti.com

SLVS979 – OCTOBER 2009

ELECTRICAL CHARACTERISTICS (continued)

VSYS = 3.6V, VDCDC1 = 2.05V, PFM mode, L = 3.3μH, COUTDCDC1 = 4.7μF, VINLDO1=2.05V, VLDO1=1.85V, TA = –40°C to 85°C

typical values apply in a temperature range of 10°C to 35°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

for I_TERM[1,0]=11 (termination current is 20% of charge

0.15×ICHG

0.2×ICHG

0.27×ICHG

current)

for I_TERM[1,0]=10 (termination current is 15% of charge

0.11×ICHG

0.15×ICHG

0.21×ICHG

current)

Charge current value for termination detection

ITERM

threshold (internally set)

for I_TERM[1,0]=01 (termination current is 10% of charge

0.07×ICHG

0.1×ICHG

0.15×ICHG

current)

for I_TERM[1,0]=00 (termination current is 5% of charge

0.03×ICHG

0.05×ICHG

0.08×ICHG

current)

tDGL(TERM)

Deglitch time, termination detected

VRCH

Recharge detection threshold

Voltage below nominal charger voltage

165

100

tDGL(RCH)

Deglitch time, recharge threshold detected

62.5

VBAT = 3.6V. Time measured from VIN: 5V

→ 3.3V 1μs

tDGL(NO-IN)

Delay time, input power loss to charger turn-off

fall-time

IBAT(DET)

Sink current for battery detection

7.5

tDET

Battery detection timer

250

Safety timer range selectable by I2C; default setting without

TCHG

Charge safety timer

–35%

35%

DPPM or thermal loop active

TPRECHG

Precharge timer

Pre charge timer range; default setting

–35%

35%

min

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