LM2005 datasheet(5/8 Pages) NSC

5 / 8 page

External Components (Figure 2)

Components

Comments

1 R1 R2

Sets voltage gain

R5 R4

AVj1a

for one channel

AVe1a

for the other

Where R’ is the equivalent resistance

of R2 in parallel with an internal 10k

resistor

R e

10k

R2a10k

If R2 m 10k then

AVj1a

2 R3

Adjusts output symmetry for maximum

power output

3 RO CO

Works to stabilize internal output

stage Necessary for stability CO

should be ceramic disc or equivalently

good high frequency capacitor

4 C1 C9

Input coupling capacitor Low

frequency pole set by

FL1e

2qZ (non-inverting) C1

Decreasing capacitor value will also

increase noise

Components

Comments

5 C4 C5

Bootstrap capacitors used to increase

drive to output stage

6 C3

Improves power supply rejection

Increasing C3 increases turn-on delay

(approximately 2 ms per mF)

7 C2 C6

Inverting input DC decouple Low

frequency pole

FL2e

2qZ(inverting)C2

Z (inverting)

10 kX

8 CC

Output coupling capacitor Isolates

pins 10 and 8 from load Low

frequency pole

FL3e

2qRLCC

9 CS

Power supply filtering

Typical Applications (Continued)

TLH5129 – 4

FIGURE 2 10WChannel Stereo Amplifier Application and Test Circuit

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