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© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

Objective data sheet

Rev. 01 — 22 April 2004

10 of 21

Philips Semiconductors

TDA8939

Zero dead time Class-D 7.5 A power comparator

[1]

When the supply voltage is below

±12.5 V the PWM outputs will not be able to switch to the high side at the first PWM cycle.

[2]

OTP, OCP and/or OVP protection activated.

12. Dynamic characteristics

[1]

Temperature protection

diagnostic trigger temperature

150

-

-

°C

Overcurrent protection

diagnostic and protection trigger

current

7.5

-

-

A

Overvoltage protection

diagnostic and protection trigger

maximum supply voltage

±30

±33

-

V

Table 10:

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 11:

Dynamic characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

PWM output

rise time output voltage

-

20

-

ns

fall time output voltage

-

20

-

ns

dead time

-

0

-

ns

large signal response time

LOW-to-HIGH transition at

output

input amplitude = 3.3 V

-

90

-

ns

large signal response time

HIGH-to-LOW transition at

output

input amplitude = 3.3 V

-

90

-

ns

minimal pulse width

-

150

-

ns

-

0.2

0.3

Ω

η

efficiency

[1]

-

-

90

-