MP44011

Boundary-Mode PFC Controller

with Harmonic Injection

MP44011 Rev. 1.01

www.MonolithicPower.com

1

1/12/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP44011 is a boundary-conduction–mode

PFC controller with an internal-harmonic–

injection function. It provides simple and high-

performance active power-factor correction with

minimal external components.

Compared

against

traditional

boundary-

conduction–mode

PFC

controllers,

the

harmonic-injection function makes the part

suitable for LED lighting applications.

In LED lighting applications with two-stage

structures, the harmonic-injection function can

effectively reduce bus capacitance between the

AC/DC and the DC/DC stage. In addition,

harmonic injection can reduce the transformer

size to save board space and BOM cost.

Also, the benefits of a harmonic-injection

function also apply to general boost or flyback

PFC applications.

The MP44011 is derived from the MP44010,

except with a harmonic-injection function.

The MP44011 is available in an 8-pin SOIC

package.

FEATURES

 Boundary-Conduction–Mode PFC Controller

for Pre-Regulation

 Reduced Bus Capacitance

 Reduced Transformer Size

 Internal Harmonic-Injection Function

 Precise Adjustable-Output Over-Voltage

Protection

 Ultra-Low Start-Up Current

 Very Low Quiescent Current

 On-Chip Filter for Current-Sense Pin

 Disable Function

 Available in SOIC-8

APPLICATIONS

 LED Lighting Driver

 General PFC Pre-Regulators

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“MPS” and “The Future of Analog IC Technology” are Registered

Trademarks of Monolithic Power Systems, Inc.

Patents pending.

TYPICAL APPLICATION

R10

U1

GATE

FB

CS

GND

COMP

ZCS

VIN

MULT

MP44011

T1

D1

R9

D3

R1

R2

C2

R11

Feedback

Network

Vbus

C1

R3

D2

R4

R5

R6

R7

R8

C4

C5

C6

C3

D1

DC/DC

Q1