TDA8928ST datasheet(9/23 Pages) PHILIPS

9 / 23 page

2004 May 05

Philips Semiconductors

Preliminary speciﬁcation

Power stage 2 x 10 or 1 x 20 W class-D

audio ampliﬁer

TDA8928J

13 AC CHARACTERISTICS

VP = ±12.5 V; Tamb =25 °C; unless otherwise speciﬁed.

Notes

1. VP = ±12.5 V; RL =8 Ω; fi = 1 kHz; fosc = 310 kHz; Rs = 0.1 Ω (series resistance of filter coil); Tamb =25 °C;

measured in reference design (SE application) shown in Fig.5; unless otherwise specified.

2. Indirectly measured; based on Rds(on) measurement.

3. Total Harmonic Distortion (THD) is measured in a bandwidth of 22 Hz to 20 kHz (AES 17 brickwall filter). When

distortion is measured using a low-order low-pass filter a significantly higher value will be found, due to the switching

frequency outside the audio band. Measured using the typical application circuit, given in Fig.5.

4. Efficiency for power stage.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Single-ended application; note 1

output power

RL =8 Ω

THD = 0.5 %

7(2)

−

THD = 10 %

9(2)

−

RL =16 Ω

THD = 0.5 %

−

THD = 10 %

−

THD

total harmonic distortion

Po = 1 W; note 3

fi = 1 kHz

−

0.05

0.1

fi = 10 kHz

−

0.2

−

efﬁciency endstage

Po =2 × 10 W; fi = 1 kHz; note 4

−

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