Rev. B 09/15

7

LYT2002-2005

www.power.com

Figure 9.

Example Schematic of LYTSwitch-2 Flyback Power Supply without Bias Supply.

Figure 7.

Desired Drain Voltage Waveform with Minimal Leakage Ringing

Undershoot.

Figure 8. Undesirable Drain Voltage Waveform with Large Leakage Ring

Undershoot.

PI-7284-043014

D

S

FB

BP

L1

470

µH

C1

4.7

µF

400 V

C4

1

µF

50 V

C2

33

µF

400 V

C6

100

µF

100 V

C7

1 nF

500 VAC

U1

LYT2005E

LYTSwitch-2

C3

1000 pF

630 V

R4

100

Ω

R8

8.06 k

Ω

1%

1/8 W

R7

140 k

Ω

1%

1/8 W

T1

EE19

9

5

10

NC

1

2

R10

130 k

Ω

D1

S1ML

4

D3

UF5404

R2

220 k

Ω

48 V

J5

RTN

J6

R1

10 k

Ω

1/8 W

F1

2 A

90 - 265

VAC

L

J2

N

J1

BR1

B10S-G

1000 V

Negative ring may increase

output ripple and/or degrade

output regulation

An overshoot is acceptable