SINGLE SUPPLY APPLICATION SUGGESTIONS

The recommended values of the external compo-

nents are those shown on the application circuit

of fig. 3. Different values can be used. The follow-

ing table can help the designer.

Component

Recommended

Value

Purpose

Larger than

Recommended Value

Smaller than

Recommended Value

R1, R2, R3

22k

Ω

Biasing Resistor

R4

22k

Ω

Feedback Resistors

Increase of Gain

Decrease of Gain (*)

R5

680

Ω

Decrease of Gain (*)

Increase of Gain

R6

2.2

Ω

Frequency Stability

Danger of Oscillations

C1

2.2

µF

Input Decoupling DC

Higher Low-frequency

cut-off

C2

100

µF

Supply Voltage Rejection

Worse Turn-off Transient

Worse Turn-on Delay

C3

1000

µF

Supply Voltage Bypass

Danger of Oscillations

Worse of Turn-off

Transient

C4

22

µF

Inverting Input DC

Decoupling

Increase of Switching

ON/OFF

Higher Low-frequency

cut-off

C5

100nF

Supply Voltage Bypass

Danger of Oscillations

C6

0.47

µF

Frequency Stability

Danger of Oscillations

C7

1000

µF

Output DC Decoupling

Higher Low-frequency

cut-off

(*) The gain must be higher than 24dB

TYPICAL CHARACTERISTICS (Split Supply Test Circuit unless otherwise specified)

NOTE

If the supply voltage is lower than 40V and the

load is 8ohm (or more) a lower value of C2 can

be used (i.e. 22

µF).

C7 can be larger than 1000uF only if the supply

voltage does not exceed 40V.

Figure 5: Output Power vs. Supply Voltage

Figure 6: Distortion vs. Output Power

TDA2050

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