VIPER20 Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

VIPER20

SMPS PRIMARY I.C

STMicroelectronics 

VIPer20/SP/DIP - VIPer20A/ASP/ADIP

COMP pin in order to limit the primary peak current

of the device to a value:

IDPEAK

=

V-----C-----O-----M-----P------–----0----.-5--

HID

where:

VCOMP

=

0.6

×

R-----1-----+-----R----2--

R2

The suggested value for R1+R2 is in the range of

220KΩ.

OVER-TEMPERATURE PROTECTION:

Over-temperature protection is based on chip

temperature sensing. The minimum junction

temperature at which over-temperature cut-out

occurs is 140ºC while the typical value is 170ºC.

The device is automatically restarted when the

junction temperature decreases to the restart

temperature threshold that is typically 40ºC below

the shutdown value (see figure 8).

Figure 18: Typical Compensation Network

VDD

-

OSC

13V +

VIPer20

DRAIN

COMP SOURCE

C2 R1

C1

FC00451

Figure 20: External Clock Synchronization

10 kΩ

VIPer20

VDD

-

OSC

13V +

DRAIN

COMP SOURCE

FC00470

Figure 19: Slope Compensation

R2 R1

VIPer20

VDD

-

OSC

13V +

DRAIN

COMP SOURCE

C2

Q1

C3

C1 R3

FC00461

Figure 21: Current Limitation Circuit Example

VDD

-

O SC

13V +

VIPer20

DRAIN

COMP SOURCE

R1

Q1

R2

FC00480

15/25

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