TPA3004D2_15 datasheet(4/47 Pages) TI

部品番号	TPA3004D2

部品情報	12-W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL

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TPA3004D2

SLOS407E – FEBRUARY 2003 – REVISED JANUARY 2011

www.ti.com

Pin Functions

I/O

DESCRIPTION

NO.

NAME

AGND

26

-

Analog ground for digital/analog cells in core

AVCC

33

-

High-voltage analog power supply (8.5 V to 18 V)

AVDD

29

O

5-V Regulated output capable of 100-mA output

AVDDREF

7

O

5-V Reference output—provided for connection to adjacent VREF terminal.

BSLN

13

I/O

Bootstrap I/O for left channel, negative high-side FET

BSLP

24

I/O

Bootstrap I/O for left channel, positive high-side FET

BSRN

48

I/O

Bootstrap I/O for right channel, negative high-side FET

BSRP

37

I/O

Bootstrap I/O for right channel, positive high-side FET

COSC

28

I/O

I/O for charge/discharging currents onto capacitor for ramp generator triangle wave biased at

V2P5

FADE

30

I

Input for controlling volume ramp rate. A logic low on this pin places the amplifier in fade mode.

A logic high on this pin allows a quick transition to the desired volume setting when cycling SD

or during power-up.

LINN

6

I

Negative differential audio input for left channel

LINP

5

I

Positive differential audio input for left channel

LOUTN

16, 17

O

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

LOUTP

20, 21

O

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

MODE

34

I

Input for MODE control. A logic high on this pin places the amplifier in the variable output mode

and the Class-D outputs are disabled. A logic low on this pin places the amplifier in the Class-D

mode and Class-D stereo outputs are enabled. Variable outputs (VAROUTL and VAROUTR)

are still enabled in Class-D mode to be used as line-level outputs for external amplifiers.

MODE_OUT

35

O

Output for control of the variable output amplifiers. When the MODE pin (34) is a logic high, the

MODE_OUT pin is driven low. When the MODE pin (34) is a logic low, the MODE_OUT pin is

driven high. This pin is intended for MUTE control of an external headphone amplifier. Leave

unconnected when not used for headphone amplifier control.

PGNDL

18, 19

-

Power ground for left channel H-bridge

PGNDR

42, 43

-

Power ground for right channel H-bridge

PVCCL

14, 15

Power supply for left channel H-bridge (tied to pins 22 and 23 internally), not connected to

PVCCR or AVCC.

PVCCL

22, 23

Power supply for left channel H-bridge (tied to pins 14 and 15 internally), not connected to

PVCCR or AVCC.

PVCCR

38,39

Power supply for right channel H-bridge (tied to pins 46 and 47 internally), not connected to

PVCCL or AVCC.

PVCCR

46, 47

Power supply for right channel H-bridge (tied to pins 38 and 39 internally), not connected to

PVCCL or AVCC.

REFGND

12

-

Ground for gain control circuitry. Connect to AGND. If using a DAC to control the volume,

connect the DAC ground to this terminal.

RINP

3

I

Positive differential audio input for right channel

RINN

2

I

Negative differential audio input for right channel

ROSC

27

I/O

Current setting resistor for ramp generator. Nominally equal to 1/8*VCC

ROUTN

44, 45

O

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

ROUTP

40, 41

O

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

SD

1

I

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

to VCC.

VARDIFF

9

I

DC voltage to set the difference in gain between the Class-D and VAROUT outputs. Connect to

GND or AVDDREF if VAROUT outputs are unconnected.

VARMAX

10

I

DC voltage that sets the maximum gain for the VAROUT outputs. Connect to GND or AVDDREF

if VAROUT outputs are unconnected.

VAROUTL

31

O

Variable output for left channel audio. Line level output for driving external HP amplifier.

VAROUTR

32

O

Variable output for right channel audio. Line level output for driving external HP amplifier.

VCLAMPL

25

-

Internally generated voltage supply for left channel bootstrap capacitors.

VCLAMPR

36

-

Internally generated voltage supply for right channel bootstrap capacitors.

4

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