MAX9741 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX9741

12W+12W, Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier

Maxim Integrated 

12W+12W, Low-EMI, Spread-Spectrum,

Stereo, Class D Amplifier

Pin Description

PIN

1, 4, 7, 11–15, 19, 21,

23, 25, 28, 33–36, 39,

42, 43, 44, 49, 50, 55, 56

2, 3, 40, 41

5, 6, 37, 38

8

9

10

16

17

18

20

22

24

26

27

29

30

31

32

45, 46

47, 48

51, 52

53, 54

—

NAME

N.C.

PGND

VDD

C1N

C1P

CHOLD

INL-

INL+

SHDN

SS

AGND

REG

INR-

INR+

G1

G2

FS1

FS2

OUTR-

OUTR+

OUTL-

OUTL+

EP

FUNCTION

No Connection. Not internally connected.

Power Ground

Power-Supply Input

Charge-Pump Flying Capacitor Negative Terminal

Charge-Pump Flying Capacitor Positive Terminal

Charge-Pump Hold Capacitor. Connect a 1µF capacitor from CHOLD to VDD.

Left-Channel Negative Input

Left-Channel Positive Input

Active-Low Shutdown. Connect SHDN to GND to disable the device. Connect to VDD for

normal operation.

Soft-Start. Connect a 0.47µF capacitor from SS to GND to enable soft-start feature.

Analog Ground

Internal Regulator Output. Bypass with a 0.01µF capacitor to PGND.

Right-Channel Negative Input

Right-Channel Positive Input

Gain-Select Input 1

Gain-Select Input 2

Frequency-Select Input 1

Frequency-Select Input 2

Right-Channel Negative Audio Output

Right-Channel Positive Audio Output

Left-Channel Negative Audio Output

Left-Channel Positive Audio Output

Exposed Paddle. Connect to GND.

Detailed Description

The MAX9741 low-EMI, Class D audio power amplifier

features several improvements to switch-mode amplifi-

er technology. This device offers Class AB perfor-

mance with Class D efficiency, while occupying

minimal board space. A unique modulation scheme

and spread-spectrum switching mode create a com-

pact, flexible, low-noise, efficient audio power amplifier.

The differential input architecture reduces common-

mode noise pickup, and can be used without input-

coupling capacitors. The device can also be

configured as a single-ended input amplifier.

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