TL1451AMFKB datasheet(9/36 Pages) TI

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TL1451A

DUAL PULSEWIDTHMODULATION CONTROL CIRCUITS

SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999

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total device

PARAMETER

TEST CONDITIONS

TL1451AQ, TL1451AM

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

Standby supply current

Off-state

1.3

1.8

Average supply current

RT = 10 kΩ

1.7

2.4

† All typical values are at TA = 25°C unless otherwise indicated.

PARAMETER MEASUREMENT INFORMATION

CPE

0.47

µF

Test

Input

VCC = 5 V

4.7 k

Ω

4.7 k

Ω

OUT1

OUT2

330 pF

10 k

Ω

Test

Input

TL1451A

Figure 1. Test Circuit

Dead Time 100%

tpe†

2.0 V

1.6 V

1.4 V

1.25 V

0.6 V

0 V

3.6 V

0 V

Oscillator Triangle Waveform

Error Amplifier Output

Dead-Time Input Voltage

Short-Circuit Protection

Comparator Input Voltage

PWM Comparator Output Voltage

Output Transistor Collector

Waveform

Protection Enable

Terminal Waveform

Short-Circuit Protection

Comparator Output

Power Supply Voltage

† Protection Enable Time, tpe = (0.051 x 106 x Cpe) in seconds

2.8 V TYP

Figure 2. TL1451A Timing Diagram

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