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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 kΩ
R5
1 kΩ
R4
R2
1 kΩ
R1
10 kΩ
D1
5.6 V
R3
1 kΩ
T3
T1
T2
C1
10 µF
PWM
3.3 V
VC
V
CC
GND
5 V
001aae338
1 kΩ
R4
C1
10 µF
PWM
5 V
VC
001aae339
16 kΩ
R5
R6
16 kΩ
R1
10 kΩ
D1
10 V
T1
C1
10 µF
VC
V
CC