LTC7892 datasheet(4/50 Pages) AD

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Data Sheet

LTC7892

analog.com

Rev. 0

4 of 50

SPECIFICATIONS

Table 1. Electrical Characteristics

(Specifications are at TJ = -40°C to +125°C for the minimum and maximum values, TA = 25°C for the typical values,

VBIAS = 12V, RUN1 and RUN2 = 5V, VPRG1 = Float, EXTVCC = 0V, DRVSET = 0V, DRVUV = 0V, DTCA and DTCB = 0V,

unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS/COMMENTS

MIN

TYP

MAX

UNITS

Input Supply

Bias Input Supply

Operating Range

VBIAS

100

Boost Converter Input

Supply Operating

Range

VIN

VBIAS ≥ 4V

Output Voltage

Operating Range

VOUT1,OUT2

1.2

100

Controller Operation

Channel 1 Regulated

Feedback Voltage

VFB1

VBIAS = 4V to 100V,

ITH1 Voltage = 0.6V to 1.2V

VPRG1 = floating, TA = 25°C

VPRG1 = floating

VPRG1 = 0V

VPRG1 = INTVCC

1.188

1.182

23.45

27.38

1.2

1.212

1.218

24.55

28.62

Channel 2 Regulated

Feedback Voltage1

VFB2

VBIAS = 4V to 100V,

ITH2 Voltage = 0.6V to 1.2V

TA = 25°C

1.188

1.182

1.2

1.212

1.218

Channel 1 Feedback

Current1

VPRG1 = floating, TA = 25°C

VPRG1 = 0V or INTVCC

-50

+50

µA

Channel 2 Feedback

Current1

TA = 25°C

-50

+50

Feedback Overvoltage

Threshold

Relative to VFBx, TA = 25°C

Transconductance

Amplifier1

gm1, gm2

ITH1 and ITH2 = 1.2V,

Sink and Source = 5µA

1.8

mmho

Maximum Current

Sense Threshold

VSENSE(MAX)

VFBx = 1.1V, SENSEx+ = 12V

ILIM = 0V

ILIM = floating

ILIM = INTVCC

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