MP6001 – MONOLITHIC FLYBACK/FORWARD DC-DC CONVERTER

INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE

MP6001 Rev. 0.91

www.MonolithicPower.com

12

4/5/2006

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© 2006 MPS. All Rights Reserved.

TM

Control Design

Generally, telecom power supplies require the

galvanic isolation between a relatively high

input voltage and low output voltages. The most

widely used devices to transfer signals across

the isolation boundary are pulse transformers

and optocouplers.

--

+

--

+

S

Tr

D

d

R6

R3

Rb

R4

R1

R2

R5

C1

TL431

--

+

MP6001_F07

Figure 7—Simplified Circuit of Isolated

Power Supply with Optocoupler Feedback

The MP6001 uses current mode control to

achieve easy compensation and fast transient

response. A type II compensation network

which has two poles and one zero is needed to

stabilize

the

system.

The

practical

compensation parameters are provided in the

EV6001DN datasheet.

Boost Controller Application

The MP6001 can be used as a boost controller

as shown in Figure 8.

MP6001

GND

COMP

FB

LINE

8

5

6

7

1

4

3

2

SW

RT

VCC

VIN

MP6001 _F08

C3

10nF

D1

200V/1A

180V

20mA

Figure 8—High Voltage LED Boost

Controller Circuit