MP7741 – 10W CLASS D MONO SINGLE ENDED AUDIO AMPLIFIER

MP7741 Rev. 1.0

www.MonolithicPower.com

9

2/17/2011

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The VDD shutdown voltage can be flexibly

adjusted by controlling UVP pin voltage. The

recommended VDD shutdown voltage is from

9.5V to power supply. As shown in the figure 2,

if external resistor RH and RL is low enough

(e.g. RH, RL < 50kΩ) compared with internal

500kΩ and 550kΩ resistor, the VDD shutdown

voltage can be calculated by the equation:

HL

VDD _ shutdown

L

(R

R )

V4 *

R

+

=

The hysteresis voltage can be calculated by the

equation：

HL

hysteresis

L

RR

V0.3 *

R

+

=

Figure 2—UVP block diagram