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APPLICATION INFORMATION

How to Set Dead Time

T = R C (0.05 + 0.35R2)

R2 in k

R1 + R2 = 5 k

D

T

T

W

W

V

REF

Dead-Time Control In

R1

R2

TL594

PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS052G – APRIL 1988 – REVISED JANUARY 2007

The primary function of the dead-time control is to control the minimum off time of the output of the TL594. The

dead-time control input provides control from 5% to 100% dead time. The TL594 can be tailored to the specific

power transistor switches that are used, to ensure that the output transistors never experience a common

on-time. The bias circuit for the basic function is shown in Figure 7.

Figure 7. Setting Dead Time

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