VIPER28 - VIPerPlus family: Peak power fixed frequency off line high voltage converter - STMicroelectronics

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Description

The device is a high-voltage converter that smartly integrates an 800 V rugged power MOSFET with PWM current-mode control.This IC is capable of meeting more stringent energy-saving standards as it has very low consumption and operates in burst mode under light load. The device features an adjustable extra power timer (EPT) that enables the IC to sustain overload conditions for a few seconds. The integrated HV startup, sense FET and oscillator with jitter allow the advantage of using minimal components in the application. The device features high-level protections like dual-level OCP, output overvoltage, short-circuit, and thermal shutdown with hysteresis. After the removal of a fault condition, the IC is automatically restarted.

All features
800 V avalanche-rugged power MOSFET allowing achieving ultra wide-range input V_ac

Embedded HV startup and sense FET

PWM current-mode controller

OCP with selectable threshold (I_Dlim) and 2^ndOCP with higher value (I_DMAX) to protect the IC from transformer saturation or short-circuit of the secondary diode

30 mW no-load consumption at 230 V_ac

Two operating frequencies:

60 kHz (L type) or 115 kHz (H type)
Jittered frequency reduces the EMI

Extra power timer (EPT) blanks the overload current for few seconds

Output overvoltage protection with tight tolerance and digital noise filter

Soft-start reduces the stress during startup and increases IC lifetime

Automatic restart after a fault condition

Thermal shutdown increases system reliability and IC lifetime
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Circuit Diagram

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Quality and Reliability

Part Number	Marketing Status	Package	Grade	RoHS Compliance Grade	Longevity Commitment	Longevity Starting Date	Material Declaration**
VIPER28HD	Active	SO-16	Industrial	Ecopack2	-	-	PDF XML
VIPER28HDTR	Active	SO-16	Industrial	Ecopack2	-	-	PDF XML
VIPER28HN	Active	PDIP 7	Industrial	Ecopack2	-	-
VIPER28LD	Active	SO-16	Industrial	Ecopack2	-	-	PDF XML
VIPER28LDTR	Active	SO-16	Industrial	Ecopack2	-	-	PDF XML
VIPER28LN	Active	PDIP 7	Industrial	Ecopack2	-	-

VIPER28HD

Package:

SO-16

Material Declaration**:

VIPER28HDTR

Package:

SO-16

Material Declaration**:

VIPER28HN

Package:

PDIP 7

Material Declaration**:

VIPER28LD

Package:

SO-16

Material Declaration**:

VIPER28LDTR

Package:

SO-16

Material Declaration**:

VIPER28LN

Package:

PDIP 7

Material Declaration**:

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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