MP1740 –3W HIGH EFFCIENCY MONO CLASS-D AUDIO AMPLIFIER
FUNCTION BLOCK DIAGRAM
AVCC
PVCC
R3
PVCC
Start-up&
Other logic
external
Internal
VON
Gate
Drive
Comparator
INN
C
Audio Input --
Ri
R1
R2
PGND
FDA
FDA
PVCC
speaker
INP
C
Audio Input +
Ri
R1
R2
Gate
Drive
Comparator
VOP
Gain=(R1/Ri)*(R3/R2)
PGND
R3
UVLO
Reference
Thermal Protection
EN
EN
Triangular
Generator
OCP&
De-POP
PGND
AGND
Figure 1—Functional Block Diagram
MP1740 Rev. 1.0
1/5/2012
www.MonolithicPower.com
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