VIPER22A データシートの表示（PDF） - STMicroelectronics

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VIPER22A

LOW POWER OFF LINE SMPS PRIMARY SWITCHER

STMicroelectronics 

VIPer22ADIP / VIPer22AS

Figure 4 : Peak Drain Current vs. Feedback Current

ID

IDpeak

4mH

100V

1/FOSC

t

18V

VDD

FB

CONTROL

DRAIN

IFB

47nF VIPer22A

SOURCE

100V

VFB

IFBsd ⋅ RFB

The drain current limitation is

obtained for VFB = 0 V, and a

negative current is drawn from

the FB pin. See the Application

section for further details.

IFB

IDpeak

IDlim

GID = –∆----I-∆-D---I--pF----eB---a---k-

IFB

0

IFBsd

Figure 5 : Thermal Shutdown

Tj

TSD

THYST

VDD

VDDon

t

Automatic

start up

t

6/15

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