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2 volume control drive options, Tfa9843aj, Philips semiconductors – Philips TFA9843AJ User Manual

Page 11: 20 w stereo power amplifier with volume control

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TFA9843AJ_1

© Koninklijke Philips Electronics N.V. 2006. All rights reserved.

Preliminary data sheet

Rev. 01 — 28 April 2006

11 of 19

Philips Semiconductors

TFA9843AJ

20 W stereo power amplifier with volume control

13.1.2 Volume control drive options

Fig 12. Volume control drive circuit with 3.3 V PWM

Fig 13. Volume control drive circuit with 5 V PWM

Fig 14. Volume control drive circuit with potentiometer

001aae337

1 k

R5

1 k

R4

R2
1 k

R1
10 k

D1
5.6 V

R3
1 k

T3

T1

T2

C1
10

µ

F

PWM

3.3 V

VC

V

CC

GND

5 V

001aae338

1 k

R4

C1
10

µ

F

PWM

5 V

VC

001aae339

16 k

R5

R6
16 k

R1
10 k

D1
10 V

T1

C1
10

µ

F

VC

V

CC