ST AN2134 APPLICATION NOTE

AN2134

Application note

TS4962M using the mono class D demonstration board

Introduction

The mono class D demo board STEVAL-CCA001V1 is designed for the TS4962M class D audio amplifier. The TS4962M device, in a Flip-Chip package, is mounted on an adapter board with DIP connectors (see Section 6) which is, in turn, mounted on the demonstration board. Figure 1 shows the schematic diagram of the demonstration board, including the Flip-Chip to DIP adapter.

Figure 1. Schematic diagram of mono class D demonstration board

	Vcc			Vcc
	Cn1 + J1
	1		Cn2			+	C1
	2
							2.2uF/10V
	3
	GND			GND		GND		Vcc
	Cn4 + J2							3	8
										U1
								Vcc
				Stdby
			4			Internal
		R1		300k		Bias
	C2				150k			Out+
	Cn3									6	Cn6
Positive Input	100nF 150k		5	-				Output			Positive Output
Negative input				In-			PWM	H			Negative Output
				In+ +
	100nF R2		1					Bridge
		150k			150k					10
	C3							Out-
						Oscillator
								GND		TS4962 Flip-Chip to DIP Adapter
	Cn5 + J3							2	3
								GND

March 2012

Doc ID 11283 Rev 5

1/11

www.st.com

Contents	AN2134

Contents

1	About the TS4962M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 4
2	Description of the demonstration board . . . . . . . . . . . . . . . . . . . . . . . .		. 5
3	Demonstration board connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		6
4	Demonstration board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		6
5	Configuring the demonstration board characteristics . . . . . . . . . . . . .		7
	5.1	Differential gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
	5.2	Input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
6	Flip-Chip to DIP adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8
7	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		10

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AN2134	List of figures

List of figures

Figure 1. Schematic diagram of mono class D demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. Mono class D demonstration board - top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 3. PCB bottom layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 4. PCB top layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 5. Schematic diagram of the Flip-Chip to DIP adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 6. Adapter top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Doc ID 11283 Rev 5

3/11

About the TS4962M	AN2134

1About the TS4962M

●Low voltage class D differential audio power amplifier with standby mode

●Operating range from VCC=2.4 V to 5.5 V

●2.3 W output power @ VCC=5 V, THD=1%, F=1 kHz, with 4 Ω load

●1.4 W output power @ VCC=5 V, THD=1%, F=1 kHz, with 8 Ω load

●Ultra low power consumption in standby mode (10 nA)

●63 dB PSRR @ 217 Hz in grounded mode (Av=2 V/V)

●Low pop and click noise

●Fast startup time 5 ms

●Module gain set at 2 V/V

●Thermal and short-circuit protection.

4/11	Doc ID 11283 Rev 5