2001 Dec 11

14

Philips Semiconductors

Objective specification

Power stage 2

× 80 W class-D

audio amplifier

TDA8927

14 SWITCHING CHARACTERISTICS

Note

1. When used in combination with the TDA8929T controller, the effective minimum pulse width during clipping is

14.1

Duty factor

For the practical useable minimum and maximum duty factor (

δ) which determines the maximum output power:

× 100% < δ <

× 100%

Using the typical values: 3.5% <

δ < 96.5%.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

PWM outputs (pins OUT1 and OUT2); see Fig.7

rise time

−

30

−

ns

fall time

−

30

−

ns

blanking time

−

70

−

ns

propagation delay

from pin SW to pin PWM

−

20

−

ns

minimum pulse width

note 1

−

220

270

ns

on-resistance of the output

transistors

−

0.2

0.3

Ω

t

W(min)

f

osc

×

2

-------------------------------

1

t

W(min)

f

osc

×

2

-------------------------------

–

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