TPA032D03

10-W MONO CLASS-D AUDIO POWER AMPLIFIER

SLOS283A – DECEMBER 1999 – REVISED MARCH 2000

3

POST OFFICE BOX 655303

Terminal Functions

TERMINAL

DESCRIPTION

NAME

NO.

DESCRIPTION

AGND

7, 20,

43, 44,

45, 46, 47

Analog ground for headphone and Class-D analog sections

COMP

6

Compensation capacitor terminal for Class-D amplifier

COSC

48

Connect a capacitor from analog ground to this terminal to set the frequency of the ramp reference signal.

CP1

24

First diode node for charge pump

CP2

25

First inverter switching node for charge pump

FAULT0

42

Logic level fault0 output signal. Lower order bit of the two fault signals with open drain output.

FAULT1

41

Logic level fault1 output signal. Higher order bit of the two fault signals with open drain output.

HPDL

23

Depop control for left headphone

HPDR

26

Depop control for right headphone

HPLIN

19

Headphone amplifier left input

HPLOUT

18

Headphone amplifier left output

HPREG

17

5-V regulator output. This terminal requires a 1-

µF capacitor to ground for stability reasons.

HPRIN

30

Headphone amplifier right input

HPROUT

31

Headphone amplifier right output

HPVCC

32

5V supply to headphone amplifier and logic. This terminal is typically connected to HPREG.

INN

4

Class-D negative input

INP

5

Class-D positive input

MODE

3

TTL logic-level mode input signal. When MODE is held low, the main Class-D amplifier is active. When MODE is

held > high, the head phone amplifier is active.

MUTE

2

Active-low TTL logic-level mute input signal. When MUTE is held low, the selected amplifier is muted. When MUTE

is held > high, the device operates normally. When the Class-D amplifier is muted, the low-side output transistors

are turned on, shorting the load to ground.

NC

34, 35,

38, 39

No connection

OUTN

14, 15

Class-D amplifier negative output of H-bridge

OUTP

10, 11

Class-D amplifier positive output of H-bridge

PGND

12, 13

Power ground for H–bridge only

PGND

27

Power ground for charge pump only

PGND

36, 37

Power ground for H-bridge only

PVDD

9, 16, 21,

28, 33, 40

VDD supply for charge-pump, headphone regulator, Class-D amplifier, and gate drive circuitry

SHUTDOWN

1

Active-low TTL logic-level shutdown input signal. When SHUTDOWN is held low, the device goes into shutdown

mode. When SHUTDOWN is held high, the device operates normally.

V2P5

29

2.5V internal reference bypass. This terminal requires a capacitor to ground.

VCP

22

Connect a capacitor from this terminal to power ground to provide storage for the charge pump output voltage.

VDD

8

VDD bias supply for analog circuitry. This terminal needs to be well filtered to prevent degrading the device

performance.