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STD D4K5 Class D Power Amplifier

License: Public Domain

Mode: Editors' pick

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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.

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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-5.5*8.5*3 2
3 1nF C3,C7,C8,C22,C23 CAP-5.5*8.5*3 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-5.5*8.5*3 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

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