Categories: Power Amplifier

240W Class D Audio Amplifier based TDA8924

Power amplifier operates in class D power amplifier is powerful enough produces a total output power 240 W (120 W each channel). Much power is generated by a chip made by Philips TDA8924.

Reference Data :

Supply voltage	: ±12V …± 30V
Supply current absence of a signal	: 100mA
Output power (max)
in stereo	: 120W
in mono	: 240W
Efficiency	: 90%

Chip also has a short-circuit proof output, thermal protection and acoustic protection from the “inrush current” when you turn on and off. The scheme provides two options turn on an amplifier – both stereo and mono on a bridge. So this could be used for amplifier subwoofer.

Power to the amplifier is connected to the following scheme :

Parts list :

Notation on the chart	Value
C1, C2, C3, C4	470nF
C5, C6	330
C7, C11, C17, C20, C8, C12, C18, C22	100
C23, C24, C32, C31	15nF
C25, C26	560
C28, C27	1mkF
C30, C29, C9, C19, C15, C13, C10, C21, C14	220nF
C16	47
D1	KS156A
L1, L2	10 uH
R1, R2, R3, R4	5.6 kOhm
R9, R8	4.7
R10, R11	22
R6, R7	39kOm
R5	30kOm
DA1	TDA8924

Power supply
C1, C2	100nF
C3, C4	470uF/35V
C7, C5, C6	47uF/63V
L1, L2, L3, L4	MURATA BL01RN1A2A2B