VIPER28 Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

VIPER28

Off-line high voltage converters

STMicroelectronics 

VIPER28

Electrical data

Table 8. Controller section

Symbol

Parameter

Test condition

Feed-back pin

VFBolp

VFBlin

VFBbm

VFBbmhys

Over-load shut down threshold

Linear dynamics upper limit

Burst mode threshold

Burst mode hysteresis

IFB

Feed-back sourced current

RFB(DYN)

HFB

CONT pin

Dynamic resistance

ΔVFB / ΔID

Voltage falling

Voltage rising

VFB = 0.3 V

3.3 V < VFB < 4.8 V

VFB < 3.3 V

VCONT_l

VCONT_h

Low level clamp voltage

High level clamp voltage

Current limitation

ICONT = -100 µA

ICONT = 1mA

IDlim

tSS

TON_MIN

td

Max drain current limitation

Soft-start time

Minimum turn ON time

Propagation delay

VFB = 4 V, ICONT = -10 µA

TJ = 25 °C

tLEB

ID_BM

Leading edge blanking

Peak drain current during burst mode VFB = 0.6 V

Oscillator section

FOSC

FD

FM

DMAX

VIPER28L

VIPER28H

Modulation depth

Modulation frequency

Maximum duty cycle

VDD = operating voltage

range, VFB = 1 V

VIPER28L

VIPER28H

Min Typ Max Unit

4.5 4.8 5.2 V

3.2 3.5 3.7 V

0.6

V

100

mV

-150 -200 -280 uA

-3

uA

14

20 kΩ

2

6 V/A

0.5

V

5

5.5

6

V

0.75 0.80 0.85 A

8.5

ms

220 400 480 ns

100

ns

300

ns

160

mA

54 60 66 kHz

103 115 127 kHz

±4

kHz

±8

kHz

250

Hz

70

80 %

Doc ID 15028 Rev 5

7/32

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