L6565D View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L6565D

QUASI-RESONANT SMPS CONTROLLER

STMicroelectronics 

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L6565

APPLICATION IDEAS

Here follows a series of ideas/suggestions aimed at either improving performance or solving common applica-

tion issues of L6565-based power supplies.

Figure 21. Enhanced turn-off for big MOSFET's drive

Vcc

8

7 GD

DRIVER

Q

L6565 6

GND

BC327

Rs

Figure 22. Latched shutdown on: a) feedback disconnection; b) overload or short circuit

BC327

Vcc

8

L6565

2

1N4148

COMP

Vcc

8

L6565

2

BC327

1N4148

COMP

BC337

BC337

a)

Figure 23. Secondary Feedback loop configurations

Vcc

8

L6565

2

1

COMP

INV

RA

RB

Vout

L6565

1

2

INV

COMP

Vout

TL431

ICOMP

TL431

a)

b)

b)

Vout

Vcc

8

L6565

1

INV

4

CS

TL431

Roff

Rs

c)

13/17

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