VIPER20-E 查看數據表（PDF） - STMicroelectronics

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VIPER20-E

SMPS PRIMARY I.C.

STMicroelectronics 

VIPer20-E/DIP-E

3 Pin Description

3.5 OSC Pin (Oscillator Frequency):

An Rt-Ct network must be connected on that to define the switching frequency. Note that

despite the connection of Rt to VDD, no significant frequency change occurs for VDD varying

from 8V to 15V. It provides also a synchronisation capability, when connected to an external

frequency source.

Figure 1. Connection Diagrams (Top View)

PENTAWATT HV

PENTAWATT HV (022Y)

OSC

Vdd

SOURCE

COMP

1

8

DRAIN

DRAIN

DRAIN

4

5

DRAIN

SC10540

DIP-8

Figure 2. Current and Voltage Convention

IDD

ID

IOSC

VDD

VDD

-

OSC

13V +

DRAIN

COMP SOURCE

ICOMP

VOSC

VCOMP

VDS

FC00020

9/31

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