VIPER31 datasheet(6/39 Pages) STMICROELECTRONICS

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Table 6. Supply section

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

High-voltage startup current source

VBVDSS_SU

Breakdown voltage of startup

MOSFET

TJ = 25°C

800

VHV_START

Drain-source startup voltage

Startup resistor

VFB > VFB_REF,

VDRAIN = 400 V,

VDRAIN = 600 V

MΩ

ICH1

VCC charging current at startup VDRAIN = 100V, VCC ≤ 1V

0.5

1.5

ICH2

VCC charging current

VFB > VFB_REF, VDRAIN = 100V

1V < VCC < VCCon

7.1

8.8

10.5

IC supply and consumptions

VCC

Operating voltage range

4.5

VCcon

VCC startup threshold

7.5

8.5

VCson

HV current source turn-on

threshold

VCC falling

4.25

4.5

VCcoff

UVLO

3.75

4.25

Quiescent current

Not switching,

VFB > VFB_REF

X, L versions

0.35

H version

0.48

ICC

Operating supply current,

switching

VDS = 150 V, VCOMP = 1.2 V,

FOSC = 30 kHz

1.25

1.7

VDS = 150 V, VCOMP = 1.2 V,

FOSC = 60 kHz

1.5

VDS = 150 V, VCOMP = 1.2 V,

FOSC = 132 kHz

2.25

2.8

Note:

1. Current supplied only during the main MOSFET OFF time.

2. Parameter assured by design and characterization.

VIPER31

Electrical and thermal ratings

DS13285 - Rev 6

page 6/39

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