TA2020-020 Ver la hoja de datos (PDF) - Tripath Technology Inc.

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TA2020-020

Stereo 20W (4Ω) Class-T Digital Audio Amplifier using Digital Power Processing™ Technology

Tripath Technology Inc. 

TECHNICAL INFORMATION

B

Pin Description

Pin

2, 8

3, 7,

16

4

6

9, 12

10, 13

11

Function

V5D, V5A

AGND1, AGND2,

AGND3

REF

OVERLOADB

VP1, VP2

IN1, IN2

MUTE

14

17

18

19, 28

20

21, 23,

26, 24

22, 25

1, 5, 15

27

29

30

31, 32

BIASCAP

SLEEP

FAULT

PGND2, PGND1

DGND

OUTP2 & OUTM2;

OUTP1 & OUTM1

VDD2, VDD1

NC

VDDA

CPUMP

5VGEN

DCAP2, DCAP1

Digital 5VDC, Analog 5VDC

Analog Ground

Description

Internal reference voltage; approximately 1.0VDC

A logic low output indicates the input signal has overloaded the amplifier.

Input stage output pins

Single-ended inputs. Inputs are a “virtual” ground of an inverting opamp with

approximately 2.4VDC bias.

When set to logic high, both amplifiers are muted and in idle mode. When low

(grounded), both amplifiers are fully operational. If left floating, the device stays in

the mute mode. Ground if not used.

Input stage bias voltage (approximately 2.4VDC).

When set to logic high, device goes into low power mode. If not used this pin

should be grounded.

A logic high output indicates thermal overload, or an output is shorted to ground,

or another output.

Power Ground (high current)

Digital Ground

Bridged outputs

Supply pin for high current H-bridges, nominally 13.5VDC.

Not connected

Analog 13.5VDC

Charge pump output (nominally 10V above VDDA)

Regulated 5VDC source used to supply power to the input section (pins 2 & 8).

Charge pump switching pins. DCAP1 (pin 32) is a free running 300kHz square

wave between VDDA and DGND (13.5Vpp nominal). DCAP2 (pin 31) is level

shifted 10 volts above DCAP1 (pin 32) with the same amplitude (13.5Vpp

nominal), frequency, and phase as DCAP1.

32-pin SSIP Package

(Front View)

NC

1

V5D

2

AGND1

3

REF

4

NC

5

OVERLOADB

6

AGND2

7

V5A

8

VP1

9

IN1

10

MUTE

11

VP2

12

IN2

13

BIASCAP

14

NC

15

AGND3

16

SLEEP

17

FAULT

18

PGND2

19

DGND

20

OUTP2

21

VDD2

22

OUTM2

23

OUTM1

24

VDD1

25

OUTP1

26

VDDA

27

PGND1

28

CPUMP

29

5VGEN

30

DCAP2

31

DCAP1

32

4 of 13

TA2020-020, Rev. 4.0, 09.00

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