MP4026 – PRIMARY SIDE CONTROL, OFFLINE LED CONTROLLER WITH ACTIVE PFC

MP4026 Rev. 1.1

www.MonolithicPower.com

9

9/9/2015

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FUNCTION DIAGRAM

EMI

Filter

N:1

Q1

MULT

COMP

CS/ZCD

VCC

Gate

GND

ZCD_OVP

detection

Zero Crossing

detection

Real Current

Control

Multiplier

Peak

detector

Brown out

PWM generator

Driver

UVLO

Internal

Power supply

OCP

Current

Sense

Current

Limit

Brown out

OTP

OCP

OVP

Figure 1—MP4026 Function Block Diagram