TPA0172

2W STEREO AUDIO POWER AMPLIFIER

SLOS327C − AUGUST 2000 − REVISED MAY 2001

3

POST OFFICE BOX 655303

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

ADDRESS0

4

I

Bit 0 of user-setable portion of device’s I2C address.

ADDRESS1

10

I

Bit 1 of user-setable portion of device’s I2C address.

BYPASS

21

Tap to voltage divider for internal midsupply bias generator.

GND

1, 13

Ground connection for circuitry. Connect to thermal pad

LHPIN

7

I

Left-channel headphone input, selected when SE/BTL is held high, or programmed via I2C.

LIN

5

I

Common left input for fully differential input. AC ground for single-ended inputs.

LLINEIN

6

I

Left-channel line input, selected when SE/BTL is held low, or programmed via I2C.

LOUT+

2

O

Left-channel positive output in BTL mode, and positive output in SE mode.

LOUT−

24

O

Left-channel negative output in BTL mode, and high impedance in SE mode.

PC-BEEP

3

I

The input for PC-BEEP mode which is enabled when a > 1-V (peak-to-peak) square wave is input to this

terminal, when PCB ENABLE is held high, or programmed via I2C. If not used, ground this terminal.

I2CVDD

16

I

The voltage on this terminal sets the trip points for the I2C interface. If the system I2C bus is running at 3.3 V,

then tie this terminal to 3.3 V. If the system I2C bus is running at 5 V, then tie this terminal to 5 V.

PVDD

8, 19

I

Power supply

RHPIN

17

I

Right-channel headphone input, selected when SE/BTL is held high, or programmed via I2C.

RIN

9

I

Common right input for fully differential input. AC ground for single-ended inputs.

RLINEIN

18

I

Right-channel line input, selected when SE/BTL is held low, or programmed via I2C.

ROUT+

12

O

Right-channel positive output in BTL mode, and positive output in SE mode.

ROUT−

14

O

Right-channel negative output in BTL mode, and high impedance in SE mode.

SCL

23

I

I2C clock line

SDA

15

Serial data line of the I2C bus. Pullup resistor must comply with the I2C standard: minimum value = 3 k

Ω,

maximum value = 19 k

Ω. Pull up to I2CVDD

SE/BTL

11

I

Input MUX control input. When this terminal is held high, the LHPIN or RHPIN, and the SE output are

selected. When this terminal is held low, the LLINEIN or RLINEIN, and the BTL output are selected. This

functionality can also be programmed via I2C.

SHUTDOWN

22

I

When held low, this terminal places the device in the shutdown mode, except for the PC-BEEP input and the

I2C bus.

VDD

20

I

Power supply