class D amplifier V2

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STD class D amplifier V2

Power

Consumer_Electronics

Home_Electronics

License: Public Domain

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Update time： 2021-10-20 01:41:42

Creation time： 2021-09-18 14:53:28

Description

The modulator section of this amplifier consist of a clock generator, low pass filter, comparator and non-inverting buffer. The input signal is biased to 2.5V and compared with an high frequency triangle wave to generate the PWM signal. The signal is then buffered before passing through a RCD network to generate dead time between the on/off pair. The gate driver drives the MOSFET gate to generate an amplifier version of the PWM. The PWM is then filtered using LC filter and finally outputs to a speaker.

Design Drawing

schematic diagram

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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	XTAL	4MHZ	XTAL	1
2	100u	C1,C20,C21,C37	CAP-D6.3×F2.5	4
3	100n	C2,C16,C17,C30	RAD-0.2	4
4	10n	C3,C6,C14,C15,C18,C23,C24,C29,C32,C33,C34	RAD-0.1	11
5	27p	C4,C5	RAD-0.1	2
6	1n	C7	RAD-0.1	1
7	2.2u	C8,C9,C10,C11	CAP-D5.0×F2.0	4
8	68p	C12,C13,C35,C36	RAD-0.1	4
9	1u	C19,C28	RAD-0.1	2
10	K_2 PIN SCREW TERMINAL 5.08MM COPY	CN1,CN2,CN3	ECO SCREW TERMINAL 5.00MM 2P AAA	3
11	ECO 3 Pin Screw Terminal 5.08mm	CN4	ECO SCREW TERMINAL 5.08MM 3P AAA	1
12	UF4007_C84067	D1,D2,D3,D4,D5,D6	DO-41_BD2.4-L4.7-P8.70-D0.9-FD	6
13	1N5361BRLG	D7	DIO-TH_BD3.5-L8.6-P12.60-D1.1-RD	1
14	IRF530N	Q1,Q2,Q3,Q4	TO-220AB-3_L10.4-W4.6-P2.54-L	4
15	1K	R1,R2	R_AXIAL-0.4	2
16	3.6k	R3	R_AXIAL-0.4	1
17	1k	R4,R5,R6,R7,R8,R9	R_AXIAL-0.4	6
18	1.5K	R10,R11,R24,R25,RS1	R_AXIAL-0.4	5
19	1J 2W FILM	R12,R13,R18,R20	R_AXIAL-0.6	4
20	10	R14,R15,R16,R17	R_AXIAL-0.4	4
21	1Meg	RF1	R_AXIAL-0.4	1
22	74LS93	U2	DIP14	1
23	LM319N	U3	DIP254P762X510-14	1
24	LM7805	U4	TO-220-3_L10.0-W4.5-P2.54-L	1
25	LM7810ACT	U5	TO-220_VERTICAL	1
26	IR2110PBF_C2967	U6,U7	DIP-14_L20.0-W7.6-P2.54-LS7.6-BL	2
27	74HC04N	U9	DIP-14_L19.2-W6.6-P2.54-LS10.9-BL	1
28	1510.521H型散热块（黑色）	U15,U16,U17,U18	HEATSINK-TH_L15.5-W10.5-XSD1226-005	4
29	3296W-1-104_C5035	VR1,VR2	RES-ADJ-TH_3296W	2
30	AUDIO DUAL GANG POTENTIOMETER_3 COPY	U1	POTENTIOMETER AUDIO DUAL	1