MP7741 – 10W CLASS D MONO SINGLE ENDED AUDIO AMPLIFIER

MP7741 Rev. 1.0

www.MonolithicPower.com

4

2/17/2011

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Parameters

Symbol Condition

Min

Typ

Max

Units

Standby Current

90

µA

Quiescent Current

No load, switching

13

mA

Power Output

f = 1kHz, THD+N = 10%, 8Ω

Load

10.6

W

THD+ Noise

0.02

%

Efficiency

94

%

Maximum Power Bandwidth

20

kHz

Dynamic Range

97

dB

Noise Floor

A-Weighted

103

µV

Power Supply Rejection

f = 1kHz

-58

dB

f = 217Hz

-58

dB

Note:

7) Operating Specifications are for the IC in Typical Application circuit (Figure 3).

PIN FUNCTIONS

Pin #

Name

Description

1

PIN

Internal analog reference (VDD/2), connect a bypass capacitor from PIN to AGND (10µF).

2

NIN

Amplifier Negative Input. Drive the input signal and close the feedback loop at NIN.

3

Timer

Internal timer input. A capacitor from Timer to AGND sets the internal timer and controls

the slew rate of start up source current.

4

AGND

Analog Ground. Connect AGND to PGND at a single point.

5

EN

Enable Input. Drive EN high to turn on the amplifier, low to turn it off.

6

UVP

Under-voltage protection reference input

7

VDD

Power Supply Input.

8

BS

High-Side MOSFET Bootstrap Input. A capacitor from BS to SW supplies the gate drive

current to the internal high-side MOSFET.

9

SW

Switched Power Output. Connect the LC filter between SW and the output coupling

capacitor.

10

PGND

Power Ground. Connect PGND to AGND at a single point.

Exposed

Pad

Connect exposed pad to GND plane for proper thermal performance.