LTC4110 datasheet(4/52 Pages) LINER

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LTC4110

4110fa

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. Unless otherwise speciﬁed, VDCIN = VDCOUT = VDCDIV = 12V, VBAT = 8.4V,

GND = SGND = CLP = CLN = SHDN = 0V and RVREF = 49.9k. All currents into device pins are positive and all currents out of device pins

are negative. All voltages are referenced to GND, unless otherwise speciﬁed.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VBOV

Battery Overvoltage Threshold;

VBAT Increasing

All Li-Ion, Lead Acid as Percentage of

Float Voltage

NiMH/NiCd (Note 8)

105

1.80

107.5

1.85

110

1.90

VBOVH

Battery Overvoltage Threshold Hysteresis;

VBAT Increasing.

All Li-Ion, Lead Acid as Percentage of

Float Voltage

NiMH/NiCd (Note 8)

VREF

Reference Pin Voltage Range

1.208

1.220

1.232

FTMR

Programmed Timer Accuracy

CTIMER = 47nF

–15

tTIMEOUT

Time Between Receiving Valid

ChargingCurrent() and ChargingVoltage()

Commands. Wake-Up Timer.

140

175

210

sec

Calibration Performance

VCTOL

Calibration Cut-Off Default Voltage Accuracy;

VBAT Decreasing

2.75V for Li-Ion, 1.93V for Lead Acid,

VCAL = GND (Note 8), 0.95V for NiMH/NiCd

–1.1

–1.3

1.1

1.3

VCTOLH

Calibration Cut-Off Default Voltage Hysteresis;

VBAT Increasing. (Note 8)

Li-Ion

Lead Acid

NiMH/NiCd

VCATOL

Calibration Cut-Off Voltage Adjust Accuracy

±400mV for Li-Ion, ±300mV for Lead Acid,

±200mV for NiMH/NiCd (Note 8)

–1.5

1.5

IFTOL

Calibration Current Accuracy (Note 7)

VCSP – VCSN = –100mV

–5

IVCAL

VCAL Pin Leakage Current

VCAL = 1.25V

–100

100

IBDT

Back-Drive Current Limit Threshold

VCLP – VCLN Decreasing

VCLN = VDCIN

710

IBDH

Back-Drive Current Limit Threshold Hysteresis VCLP – VCLN Increasing

VCLN = VDCIN

1mV

VOVP

Calibration Mode Input Overvoltage

Comparator DCDIV Pin Threshold

VDCDIV Rising

1.4

1.5

1.6

VOVPH

Calibration Mode Input Overvoltage

Comparator DCDIV Pin Hysteresis

VDCDIV Falling

100

AC Present and Discharge Cut-Off Comparators

VAC

AC Present Comparator DCDIV Pin Threshold

VDCDIV Falling

1.196

1.22

1.244

VACH

AC Present Comparator DCDIV Pin Hysteresis

VDCDIV Rising

IAC

AC Present Comparator DCDIV Pin Input Bias

Current

VDCDIV = 1.25V

100

tAC

ACPb Pin Externally Programmed Falling Delay CACPDLY = 100nF, RVREF = 49.9k,

VDCDIV Stepped From 1.17V to 1.30V

VDTOL

Discharge Cut-Off Default Voltage Accuracy;

VBAT Decreasing

2.75V for Li-Ion, 1.93V for Lead Acid,

VDIS = GND, 0.95V for NiMH/NiCd

–1.5

1.5

VDTOLH

Discharge Cut-Off Default Voltage Hysteresis;

VBAT Increasing (Note 8)

Li-Ion

Lead acid

NiMH/NiCd

VDATOL

Discharge Cut-Off Voltage Adjust Accuracy

±400mV for Li-Ion, ±300mV for Lead Acid,

±200mV for NiMH/NiCd

IVDIS

VDIS Pin Bias Current

VDIS = 1.25V

–100

100

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