1

2

3

4

5

6

7

8

9

10

11

12

PVCCL

SD

PVCCL

MUTE

LIN

RIN

BYPASS

AGND

AGND

PVCCR

VCLAMP

PVCCR

24

23

22

21

20

19

18

17

16

15

14

13

PGNDL

PGNDL

LOUT

BSL

AVCC

AVCC

GAIN0

GAIN1

BSR

ROUT

PGNDR

PGNDR

TPA3121D2

SLOS537B – MAY 2008 – REVISED JANUARY 2014

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

PWP (TSSOP) PACKAGE

(TOP VIEW)

Table 1. TERMINAL FUNCTIONS

TERMINAL

I/O/P

DESCRIPTION

24-PIN

NAME

(PWP)

Shutdown signal for IC (low = disabled, high = operational). TTL logic levels with compliance to

SD

2

I

AVCC

RIN

6

I

Audio input for right channel

LIN

5

I

Audio input for left channel

GAIN0

18

I

Gain select least-significant bit. TTL logic levels with compliance to AVCC

GAIN1

17

I

Gain select most-significant bit. TTL logic levels with compliance to AVCC

Mute signal for quick disable/enable of outputs (high = outputs switch at 50% duty cycle, low =

MUTE

4

I

outputs enabled). TTL logic levels with compliance to AVCC

BSL

21

I/O

Bootstrap I/O for left channel

PVCCL

1, 3

P

Power supply for left-channel H-bridge, not internally connected to PVCCR or AVCC

LOUT

22

O

Class-D ½-H-bridge positive output for left channel

PGNDL

23, 24

P

Power ground for left-channel H-bridge

VCLAMP

11

P

Internally generated voltage supply for bootstrap capacitors

BSR

16

I/O

Bootstrap I/O for right channel

ROUT

15

O

Class-D ½-H-bridge negative output for right channel

PGNDR

13, 14

P

Power ground for right-channel H-bridge.

PVCCR

10, 12

P

Power supply for right-channel H-bridge, not connected to PVCCL or AVCC

AGND

9

P

Analog ground for digital/analog cells in core

AGND

8

P

Analog ground for analog cells in core

Reference for preamplifier inputs. Nominally equal to AVCC/8. Also controls start-up time via

BYPASS

7

O

external capacitor sizing.

AVCC

19, 20

P

High-voltage analog power supply. Not internally connected to PVCCR or PVCCL

Connect to ground. Thermal pad should be soldered down on all applications to secure the

Thermal pad

Die pad

P

device properly to the printed wiring board.

2

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