TDA7265 데이터 시트보기 (PDF) - STMicroelectronics

부품명

상세내역

제조사

TDA7265

25 +25W STEREO AMPLIFIER WITH MUTE & ST-BY

STMicroelectronics 

TDA7265

APPLICATIONS SUGGESTION

(Demo Board Schematic)

The recommended values of the external compo-

nents are those shown are the demo board sche-

matic different values can be used: the following

table can help the designer.

COMPONENTS

RECOMMENDED

VALUE

PURPOSE

LARGER THAN

SMALLER THAN

RECOMMENDED VALUE RECOMMENDED VALUE

R1

10KΩ

Mute Circuit

Increase of Dz

Biasing Current

R2

15KΩ

Mute Circuit

Vpin # 5 Shifted Downward Vpin # 5 Shifted Upward

R3

18KΩ

Mute Circuit

Vpin # 5 Shifted Upward

Vpin # 5 Shifted Downward

R4

15KΩ

Mute Circuit

Vpin # 5 Shifted Upward

Vpin # 5 Shifted Downward

R5, R8

R6, R9

18KΩ

560Ω

Closed Loop Gain

Setting (*)

Increase of Gain

Decrease of Gain

R7, R10

4.7Ω

Frequency Stability Danger of Oscillations

Danger of Oscillations

C1, C2

1µF

Input DC

Decoupling

Higher Low Frequency

Cutoff

C3

1µF

St-By/Mute Time

Constant

Larger On/Off Time

Smaller On/Off Time

C4, C6

1000µF

Supply Voltage

Bypass

Danger of Oscillations

C5, C7

0.1µF

Supply Voltage

Bypass

Danger of Oscillations

C8, C9

0.1µF

Frequency Stability

Dz

5.1V

Mute Circuit

Q1

BC107

Mute Circuit

(*) Closed loop gain has to be => 25dB

MUTE, STAND-BY TRUTH TABLE

SW1

B

B

A

A

SW2

A

B

A

B

STAND-BY

STAND-BY

MUTE

PLAY

8/11

Share Link: