MP7748S

–2 X 30W STEREO SE OR 60W MONO BTL CLASS D AUDIO AMPLIFIER

MP7748S Rev. 1.0

www.MonolithicPower.com

16

10/14/2013

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Programmable UVP

MP7748S

integrate

programmable

UVP

function, which can be used to shutdown the

MP7748S to escape the pop, by controlling the

UVP node voltage. The VDD shutdown voltage

can be flexibly adjusted by the external resistor,

as shown in the figure 2.

VDD

UVP

AGND

+2.2V

+

-

Fig

ure 2

—UVP Block Diagram

the VDD shutdown voltage (rising threshold)

can be calculated by the equation:

HL

VDD _ shutdown

L

(R

R )

V

2.2 *

R





If the UVP pin is NC, the default VDD shutdown

voltage (rising threshold) is 8.4V since there is

internal voltage divided circuit.

For example, please see the table 1 for

recommended UVP setting for reduce the

power off pop.

UVP setting.

VDD

(V)

VDD_shutdown

(V)

12

8.6

15k

5.1k

24

19

39k

5.1k

36

26

56k

5.1k