LM2878P datasheet(6/8 Pages) NSC

Part #	LM2878P

Description	LM2878 Dual 5 Watt Power Audio Amplifier

PDF	8 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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6 / 8 page

External Components (Figure 3)

1 R2 R5 R7 R10 Sets voltage gain AV e 1 a R2R5 for

one channel and AV e 1 a R10R7 for

the other channel

2 R4 R8

Resistors set input impedance and sup-

ply bias current for the positive input

3 RO

Works with CO to stabilize output stage

4 C1

Improves power supply rejection (see

Typical Performance Characteristics)

5 C11

Stabilizes amplifier may need to be larg-

er depending on power supply filtering

6 C4 C8

Input coupling capacitor Pins 4 and 8

are at a DC potential of VS 2 Low fre-

quency pole set by

fL e

2qR4C4

7 C5 C7

Feedback capacitors Ensure unity gain

at DC Also low frequency pole at

fL e

2qR5C5

8 CO

Works with RO to stabilize output stage

9 C2 C10

Output coupling capacitor Low frequen-

cy pole given by

fL e

RqRLC2

Typical Applications (Continued)

TLH7934 – 7

FIGURE 3 Stereo Amplifier with AV e 200

TLH7934 – 8

FIGURE 4 LM2878 Servo Amplifier in

Bridge Configuration

LM2878P Datasheet(PDF) 6 Page - National Semiconductor (TI)