TDA7298 查看數據表（PDF） - STMicroelectronics

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TDA7298

28W Hi-Fi AUDIO POWER AMPLIFIER WITH MUTE / STAND-BY

STMicroelectronics 

TDA7298

APPLICATIONS SUGGESTIONS (See Test and Application Circuit)

The recommended values of the external components are those shown on the application circuit. Differ-

ent values can be used; the following table can help the designer.

Comp.

R1

R2

R3

R4

R5

R6

C1

Value

22KΩ (*)

560Ω

22KΩ (*)

22KΩ (*)

22KΩ

4.7Ω

1µF

Purpose

Input Impedance

Closed Loop Gain set to

32dB (**)

Input Impedance @ Mute

Stand-by Time Constant

Frequency Stability

Input DC Decoupling

Larger Than

Increase of Input

Impedance

Decrease of Gain

Increase of Gain

Danger of oscillations

C2

10µF

Feedback DC Decoupling

C3

C4

C5, C6

10µF

0.100µF

1000µF

Stand-by Time Constant

Frequency Stability

Supply Voltage Bypass

(*) R1 = R3 = R4 for POP optimization

(**) Closed Loop Gain has to be ≥ 30dB

Smaller Than

Decrease of Input

Impedance

Increase of Gain

Decrease of Gain

Danger of oscillations

Higher Low-frequency

cut-off

Higher Low-frequency

cut-off

Danger of Oscillations

TYPICAL CHARACTERISTICS

Figure 1: Output Power vs. Supply Voltage

Figure 2: Distortion vs. Output Power

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