MP7722 – 2 x 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER

MP7722 Rev. 1.3

www.MonolithicPower.com

4

9/25/2006

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Pin #

Name

Description

17

BS1

High-Side MOSFET Bootstrap Input for Amplifier 1. A capacitor from BS1 to SW1 supplies

the gate drive current to the internal high-side MOSFET. Connect a 1µF capacitor from

SW1 to BS1. See Figure 1.

18

VDD1

Power Supply Input. Bypass VDD1 to PGND1 with a 1µF X7R capacitor (in addition to the

main bulk capacitor), placed close to the IC PIN18 and PIN20.

19

SW1

Switched Power Output. SW1 is the output of Amplifier 1. Connect the LC filter to this pin.

See Figure 1.

20

PGND1 Power Ground for Amplifier 1. Connect PGND1 to PGND2. See Figure 1.

TYPICAL PERFORMANCE CHARACTERISTICS

FREQUENCY (Hz)

100

10

1

0.1

0.01

20

100

1K

10K

FREQUENCY (Hz)

20

10

1

0.1

0.01

0.1

1

10

f=10KHz

f=100Hz

f=1KHz

20

10

1

0.1

0.01

0.1

1

10

f=10KHz

f=100Hz

f=1KHz

100

10

1

0.1

0.01

20

100

1K

10K