D4K5 Class D Power Amplifier

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STD D4K5 Class D Power Amplifier

Audio

Power_Module

Home_Electronics

License: Public Domain

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Update time： 2024-05-09 07:03:50

Creation time： 2023-02-11 20:08:11

Description

This is the classic D4K5 Class D audio amplifier. Based on the power sulpply the amplifier can generate up to 600-700W on 4 ohm. The bias is beetwen 8 and 18V. The supply is simetric and it can be between +/-32 to+/-90Vcc.
Attention: The bias negative lead is directly connected to negative rail so you need a galvanic isolated supply for that, DO NOT CONNECT it to the POWER GND.

Design Drawing

schematic diagram

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PCB

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PCB_D4K5 Class D amplifier
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	10uF/16V	C1	CAP-TH_BD5.0-P2.00-D0.5-FD-1	1
2	10nF	C2,C17	CAP-5.58.53	2
3	1nF	C3,C7,C8,C22,C23	CAP-5.58.53	5
4	220uF/16V	C4	CAP-TH_BD6.3-P2.50-D1.0-FD	1
5	100nF	C5,C9,C12,C13,C14,C19,C20,C37	CAP-5.58.53	8
6	470uF/16V	C6,C10	CAP-TH_BD8.0-P3.50-D0.6-FD	2
7	100uF/16V	C11,C15,C16,C21	CAP-TH_BD5.0-P2.00-D0.5-FD-1	4
8	10uF/63V	C18	CAP-TH_BD5.0-P2.00-D0.5-FD-1	1
9	220nF/275V	C24,C25,C26	CAP-TH_L32.0-W13.0-P27.50-D0.8	3
10	470uF/250V	C27,C28,C29,C30,C31,C32	CAP-TH_BD16.0-P7.50-D1.2-FD	6
11	100nF/275V	C33,C34,C36	CAP-TH_L12.0-W4.5-P10.00-D0.6	3
12	470nF/275V	C35	CAP-TH_L17.5-W7.5-P15.00-D0.8	1
13	1N4148	D1,D2,D4,D7,D10	DO-35	5
14	5V6	D3,D5,D6	DO-41_BD2.4-L4.7-P8.70-D0.9-RD	3
15	1N5819	D8,D11,D12,D13,D14,D15	DO-41_BD2.4-L4.7-P8.70-D0.9-RD	6
16	MUR860	D9	TO-220AC_L10.0-W4.5-P5.08-T	1
17	MUR460	D16,D17,D18,D19	DO-27_BD5.2-L8.9-P12.90-D1.5-RD	4
18	INPUT	HD1	HDR-2X1/2.54	1
19	Bias	HD2	HDR-2X1/2.54	1
20	OUTPUT	HD3	1287-2P_L7.9-W8.1-P5.08	1
21	PWR GND	HD4	1287-2P_L7.9-W8.1-P5.08	1
22	-VDC	HD5	1287-2P_L7.9-W8.1-P5.08	1
23	+VDC	HD6	1287-2P_L7.9-W8.1-P5.08	1
24	SPK GND	HD7	1287-2P_L7.9-W8.1-P5.08	1
25	22uH	L1	INDUCTOR-TORROID-FLAT	1
26	Red	LED1	LED-3MM	1
27	Blue	LED2	LED-3MM	1
28	2N5401	Q1	TO-92-3_L4.8-W3.7-P2.54-L	1
29	BD139	Q2,Q5	TO-126-3_L7.6-W2.7-P2.30-L	2
30	BD140	Q3,Q6	TO-126-3_L7.6-W2.7-P2.30-L	2
31	IRFP4227	Q4,Q7,Q8,Q9,Q10,Q11	TO247BH	6
32	100k	R1,R6,R16	AXIAL-0.4	3
33	1k	R2,R3,R5,R7,R17,R19,R23,R25	AXIAL-0.4	8
34	10	R4,R12,R18,R20,R30	AXIAL-0.4	5
35	4k7	R8,R21,R29,R31	AXIAL-0.4	4
36	6k8	R9,R24	AXIAL-0.4	2
37	6k8	R10,R13	2W RESISTOR	2
38	100	R11	AXIAL-0.4	1
39	4.7	R14,R15	AXIAL-0.4	2
40	47	R22,R32,R33,R34,R35,R37	AXIAL-0.4	6
41	0.1	R26,R27,R28	RES-TH_12R_2W	3
42	22	R36	RES-TH_12R_2W	1
43	22	R38	R25	1
44	1k	R39	5W RESISTOR	1
45	10	R40	2W RESISTOR	1
46	10k	SR1	RES-ADJ_3296W	1
47	TL071CP	U1	PDIP-8_L9.6-W6.4-P2.54-LS7.9-BL-1	1
48	CD4049	U2	CD4049UBE	1
49	NE555	U3	DIP-8_L9.8-W6.4-P2.54-LS7.6-BL	1
50	IR2110	U4	DIP-14_L20.0-W7.6-P2.54-LS7.6-BL	1
51	LM311P	U5	DIP-8_L10.0-W6.5-P2.54-LS7.6-BL-1	1