L5991 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

L5991

PRIMARY CONTROLLER WITH STANDBY

STMicroelectronics 

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L5991 - L5991A

Figure 47. Device shutdown on mains undervoltage.

VIN

80÷400VDC

5.1

R1

VREF

4

4.7K

L5991

R2 10KΩ

3

12

11

SGND PGND

D97IN750B

Figure 48. Synchronization to flyback pulses (for monitors).

SYNC

1KΩ

5.1V

1 L5991

12

SGND

D97IN753A

20/23

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