TA0102A Ver la hoja de datos (PDF) - Tripath Technology Inc.

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TA0102A

STEREO 150W (4Ω) CLASS-T DIGITAL AUDIO AMPLIFIER DRIVER USING DIGITAL POWER PROCESSING (DPP™) TECHNOLOGY

Tripath Technology Inc. 

Tripath Technology, Inc. - Technical Information

Functional Description

TA0102A Amplifier Operation

Figure 3 is a simplified diagram of one channel (channel 1) of a TA0102A amplifier to assist in

understanding its operation.

TA0102A

18 FDBKN1

MUTE

4

RIN

IN1 6

CIN

BBM0

7

BBM1

8

OCR1 11

ROCR1

16 OCS1H+

Over-current

Detection

15 OCS1H-

VSPOS

RS

VBOOT

M

22 HO1

Processing

&

Modulation

21 HO1COM RG

19 VN12

M

20 LO1

RG

17 LO1COM

Low-pass

Filter

RL

Over-current 13 OCS1L+

Detection

14 OCS1L-

9 GNDKELVIN1

RS

VSNEG

2

OVERLOADB

35

HMUTE

V5

3

23

Over/Under

Voltage

24

VSPOS

VSNEG

A Gnd

P Gnd

1

28

Figure 3. Simplified TA0102A Amplifier

The audio input signal (IN1) is fed into the processor internal to the TA0102A, where a modulation

pattern is generated. This pattern is spread spectrum and varies between approximately 200kHz and

1.5MHz. Complementary copies of the switching pattern are level-shifted by the MOSFET drivers

and output from the TA0102A where they drive the gates (HO1 and LO1) of external power

MOSFETs that are connected as a half bridge. The output of the half bridge is a power-amplified

version of the switching pattern that switches between VSPOS and VSNEG. This signal is then low-pass

filtered to obtain amplified audio.

9

TA0102A, Rev. 3.1/06.01

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