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

MP7722 Rev. 1.3

www.MonolithicPower.com

3

9/25/2006

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© 2006 MPS. All Rights Reserved.

OPERATING SPECIFICATIONS

Parameters

Symbol Condition

Min

Typ

Max

Units

f = 1KHz, THD+N = 10%,

4Ω Load

20

W

Power Output

f = 1KHz, THD+N = 10%,

8Ω Load

10

W

Load

0.16

%

THD+ Noise

Load

0.06

%

Load

90

%

Efficiency

Load

95

%

Maximum Power Bandwidth

20

KHz

Dynamic Range

93

dB

Noise Floor

A-Weighted

190

µV

Power Supply Rejection

f = 1KHz

60

dB

PIN FUNCTIONS

Pin #

Name

Description

1, 5, 11,

16

NC

No Connect. Not internally connected

2

REF1

Amplifier 1 Reference. REF1 is the reference point for amplifier 1. Use a resistive voltage

3

IN1

Amplifier 1 Input. IN1 is the inverting input for amplifier 1.

4

AGND1 Analog Ground 1. Connect AGND1 to AGND2.

6

EN1

Enable Input 1. EN1 must be connected to EN2. Drive EN1 high to enable MP7722; low to

disable it.

7

IN2

Amplifier 2 Input. IN2 is the inverting input for amplifier 2.

8

REF2

Amplifier 2 Reference. REF2 is the reference point for amplifier 2. Use a resistive voltage

9

AGND2 Analog Ground 2. Connect AGND2 to AGND1.

10

EN2

Enable Input 2. EN2 must be connected to EN1. Drive high to enable MP7722, drive low to

disable.

12

BS2

High-Side MOSFET Bootstrap Input for Amplifier 2. A capacitor from BS2 to SW2 supplies

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

SW2 to BS2.

13

VDD2

Power Supply Input. Bypass VDD2 to PGND2 with a 1µF X7R capacitor (in addition to the

main bulk capacitor), placed close to the IC PIN13 and PIN15.

14

SW2

Switched Power Output. SW2 is the output of Amplifier 2. Connect the LC filter to this pin.

15

PGND2 Power Ground for Amplifier 2. Connect PGND2 to PGND1.