Mono/Stereo 2W Switch-Mode (Class-D)

Audio Power Amplifiers

16

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a 10µF capacitor in parallel with a 1µF capacitor to

GND. Ceramic capacitors are recommended due to

their low ESR.

Good PC board layout techniques optimize perfor-

mance by decreasing the amount of stray capacitance

at the amplifier’s inputs and outputs. To decrease stray

capacitance, minimize trace lengths by placing exter-

nal components as close as possible to the amplifier.

Surface-mount components are recommended.

The MAX4295/MAX4297 require two separate ground

planes to prevent switching noise from the MOSFETs in

the H-bridge from coupling into the rest of the circuit.

PGND, the power ground, is utilized by the H-bridge

and any external output components, while GND is

used by the rest of the circuit. Connect the PGND and

GND planes at only one point, as close to the power

supply as possible. Any external components associat-

ed with the output of the MAX4295/MAX4297 must be

connected to the PGND plane where applicable. Use

the Typical Operating Circuit diagram as a reference.

Refer to the evaluation kit manual for suggested com-

ponent values, component suppliers, and layout.

Chip Information

TRANSISTOR COUNT: MAX4295: 846

MAX4297: 1191

PROCESS: BiCMOS

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

GND

SS

OUT-

PGND

GND

FS2

FS1

SHDN

TOP VIEW

MAX4295

SO/QSOP

OUT+

VCM

PGND

IN

AOUT

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

SS

SHDN

INL

AOUTL

OUT- L

PGND

PGND

OUT-R

OUT+ R

PGND

PGND

OUT+ L

16

15

14

13

9

10

11

12

FS2

FS1

VCM

AOUTR

INR

GND

SO/SSOP

MAX4297

Pin Configurations