13/17

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

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

Figure 23. Secondary Feedback loop configurations

7

6

8

GD

GND

DRIVER

Vcc

Q

L6565

Rs

BC327

a)

8

Vcc

L6565

2

COMP

b)

8

Vcc

L6565

2

COMP

BC337

BC327

1N4148

BC337

BC327

1N4148

Vout

TL431

L6565

COMP

INV

Vcc

8

1

2

Vout

TL431

L6565

COMP

INV

1

2

Vout

TL431

L6565

4

CS

1

INV

Vcc

8

Rs

Roff

a)

b)

c)