TL594IDE4 datasheet(5/19 Pages) TI

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SWITCHING CHARACTERISTICS

PARAMETER MEASUREMENT INFORMATION

Vref

FEEDBACK

Amplifier Under Test

Other Amplifier

TL594

PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS052G – APRIL 1988 – REVISED JANUARY 2007

ELECTRICAL CHARACTERISTICS (continued)

CC = 15 V, over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS(1)

MIN

TYP(2)

MAX

UNIT

PWM Comparator Section (see Figure 2)

Input threshold voltage, FEEDBACK

Zero duty cycle

4.5

Input sink current, FEEDBACK

FEEDBACK = 0.5 V

0.3

0.7

Undervoltage Lockout Section (see Figure 2)

TA = 25°C

Threshold voltage

∆T

A = MIN to MAX

3.5

6.9

Hysteresis(6)

100

Overall Device

VCC = 15 V

RT at Vref,

Standby supply current

All other inputs and outputs open

VCC = 40 V

Average supply current

DTC = 2 V, See Figure 2

12.4

(6)

Hysteresis is the difference between the positive-going input threshold voltage and the negative-going input threshold voltage.

CC = 15 V, TA = 25°C, over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output-voltage rise time

100

200

Common-emitter configuration (see Figure 3)

Output-voltage fall time

100

Output-voltage rise time

200

400

Emitter-follower configuration (see Figure 4)

Output-voltage fall time

100

Figure 1. Amplifier-Characteristics Test Circuit

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