Mono, 2W, Switch-Mode (Class D)

Audio Power Amplifier

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7

-0.025

-0.020

-0.015

-0.010

-0.005

0

0.005

0.010

0.015

2.5

3.5

3.0

4.0

4.5

5.0

5.5

OSCILLATOR FREQUENCY DEVIATION

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

1MHz

125kHz

250kHz

500kHz

400

µs/div

STARTUP/SHUTDOWN

WAVEFORM

MAX4295 toc27

SHDN

VOUT

2.5V/div

4V/div

RL = 4

Ω

fOSC = 250kHz

fIN = 10kHz

CSS = 560pF

Typical Operating Characteristics (continued)

(VCC = PVCC = +3V, input amplifier gain = -1, SHDN = VCC , TA = +25°C, unless otherwise noted.)

Pin Description

PIN

NAME

FUNCTION

1, 12

GND

Analog Ground

2, 15

PVCC

H-Bridge Power Supply

3

OUT+

Positive H-Bridge Output

4, 13

PGND

Power Ground

5VCC

Analog Power Supply

6

VCM

Audio Input Common-Mode Voltage. Do not connect. Minimize parasitic coupling to this pin.

7IN

Audio Input

8

AOUT

Input Amplifier Output

9

SHDN

Active-Low Shutdown Input. Connect to VCC for normal operation. Do not leave floating.

10

FS1

Frequency Select Input 1

11

FS2

Frequency Select Input 2

14

OUT-

Negative H-Bridge Output

16

SS

Soft-Start