VIPER53-E View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

VIPER53-E

OFF-line primary switch

STMicroelectronics 

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Operation pictures

Figure 12. Oscillator schematic

Vcc

VDD

Rt

VIPer53 - E

OSC

320 Ω

Ct

SOURCE

PWM

section

The switching frequency settings shown on the graphic here below is valid within the

following boundaries:

Rt > 2kΩ

FSW = 300kHz

Figure 13. Oscillator settings

Frequency (kHz)

300

2.2nF

4.7nF

1nF

100

10nF

22nF

12/36

10

1

10

100

RT (KΩ)

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