VIPER15 datasheet(8/40 Pages) STMICROELECTRONICS

8 / 40 page

Electrical data

VIPER15

8/40

Doc ID 15455 Rev 5

Table 8.

Controller section

Symbol

Parameter

Test condition

Min.

Typ.

Max. Unit

Feedback pin

VFBolp

Overload shutdown threshold

4.5

4.8

5.2

VFBlin

Linear dynamics upper limit

3.2

3.3

3.4

VFBbm

Burst mode threshold

Voltage falling

0.4

0.45

0.5

VFBbmhys

Burst mode hysteresis

Voltage rising

IFB

Feedback sourced current

VFB = 0.3 V

-150

-200

-280

3.3 V < VFB < 4.8 V

-3

RFB(DYN)

Dynamic resistance

VFB < 3.3 V

HFB

ΔV

FB / ΔID

V/A

ZCD pin

VZCDCLh

Upper clamp voltage

IZCD = 1 mA

5.5

VZCDAth

Arming voltage threshold

Positive-going edge

0.8

VZCDTth

Triggering voltage threshold

Negative-going edge

0.6

IZCD

Internal pull-up

-2

µA

TBLANK

Turn-on inhibit time after

MOSFET’s turn-off

VZCD < 1 V

6.3

µs

VZCD >1 V

2.5

µs

Current limitation

IDlim

Max drain current limitation

VFB = 4 V,

IZCD = -10 µA

TJ = 25 °C

0.38

0.4

0.42

tSS

Soft start time

VIPER15L

3.5

VIPER15H

4.2

tSU

Start up time

VIPER15L

7.5

VIPER15H

9.5

TON_MIN

Minimum turn ON time

220

400

480

Propagation delay

100

tLEB

Leading edge blanking

300

ID_BM

Peak drain current during

burst mode

VFB = 0.6 V

Overcurrent protection (2nd OCP)

IDMAX

Second overcurrent threshold

0.6

Overvoltage protection

VOVP

Overvoltage protection

threshold

3.8

4.2

4.6

TSTROBE

Overvoltage protection strobe

time

2.2

μs

Obsolete

Product(s)

- Obsolete

Product(s)

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