MP44010(2012) Ver la hoja de datos (PDF) - Monolithic Power Systems

Número de pieza

componentes Descripción

Fabricante

MP44010
(Rev.:2012)

Boundary Mode PFC Controller

Monolithic Power Systems 

MP44010 – BOUNDARY MODE PFC CONTROLLER

PIN FUNCTIONS

Pin #

1

2

3

4

5

6

7

8

Name

FB

COMP

MULT

CS

ZCS

GND

GATE

VIN

Description

Feedback pin. The output voltage is fed into this pin through a resistor divider.

Output of the error amplifier. A compensation network is connected between this pin and FB

pin.

Input of the multiplier. Connect this pin to the rectified main voltage via a resistor divider to

provide the sinusoidal reference for the current control loop.

Current sense pin. The current through MOSFET is fed into this pin via a resistor. The

resulting voltage on this pin is compared with the output of internal multiplier to get an internal

sinusoidal-shaped reference, to determine MOSFET’s turn-off. On-chip R/C filter can reduce

high frequency noise on this pin.

Inductor’s zero-crossing current sensing input. A negative-transition edge triggers MOSFET’s

turn-on.

Ground.

Gate driver output. The high output current of the gate driver is able to drive low-cost power

MOSFET. The high-level voltage of this pin is clamped to 12V in case this pin is supplied with

a high VCC.

Supply voltage of both the signal path of the IC and the gate driver. A bypass capacitor from

this pin to ground is needed to reduce noise.

BLOCK DIAGRAM

ZCS

VIN

GND

Voltage

regulator

2.1V

1.35V

Disable

-

+

Starter

+

Vref -

UVLO

SQ

R

+-

2pF

150k

Multiplier

Driver

Overvoltage

detection

-

+

2.5V

GATE

FB

CS

MULT

COMP

Figure 1—Functional Block Diagram

MP44010 Rev. 1.11

www.MonolithicPower.com

8

10/17/2012

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© 2012 MPS. All Rights Reserved.

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