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PT2002 V1.0

- 3 -

May, 2008

3CH, 2.2W, Class-D Audio Power Amplifier

PT2002

APPICATION CIRCUIT

OUTPUT WITH FERRITE BEAD FILTER

IN3P

1

IN3N

2

NC

3

NC

4

IN2N

5

IN2P

6

MCLR

7

VDD

8

GND

9

SD

10

IN1P

11

IN1N

12

OUT1N

13

GND1

14

VDD1

15

OUT1P

16

OUT2P

17

VDD2

18

GND2

19

OUT2N

20

OUT3N

21

GND3

22

VDD3

23

OUT3P

24

IC1

PT2002

R1

1K

R2

1K

R3

1K

R4

1K

R5

1K

R6

1K

C1

0.22uF

C2

0.22uF

C3

0.22uF

C4

0.22uF

C6 0.22uF

C7 0.22uF

C8

1uF

C5

0.22uF

C9

1uF

C10

1uF

C11

1uF

C14

1n

C15

1n

C16

1n

C17

1n

C18

1n

C19

1n

L1

FB

L2

FB

1

2

SP3

OUT3

1

2

SP2

OUT2

1

2

SP1

OUT1

C12

10uF

TP1

Vcc

TP2

GND

P1

CH1

P2

CH2

P3

CH3

C13

10uF

L3

FB

L4

FB

L5

FB

L6

FB

L7

FB

L8

FB

SW1

SHUTDOWN

Notes:

1. Ferrite Bead specification: Z=120Ω@100MHz, Current>3A

2. R1, R2, R3, R4, R5, R6 is an optional for reduce gain only; in general application these resistors are

not required.