VIPER28HN
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STMicroelectronics VIPER28HN

Manufacturer No:
VIPER28HN
Manufacturer:
STMicroelectronics
Package:
Tube
Description:
IC OFFLINE SWITCH FLYBACK 7DIP
Delivery:
Payment:
iso14001
iso45001
iso9001
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Product Introduction

Overview

The VIPER28HN, produced by STMicroelectronics, is a high-voltage converter that integrates an 800 V rugged power MOSFET with PWM current-mode control. This IC is designed to meet stringent energy-saving standards, featuring very low consumption and burst mode operation under light load conditions. The device includes an adjustable extra power timer (EPT) to sustain overload conditions for a few seconds and incorporates high-level protections such as dual-level overcurrent protection, output overvoltage protection, short-circuit protection, and thermal shutdown with hysteresis. After a fault condition, the IC automatically restarts, enhancing system reliability and IC lifetime.

Key Specifications

Specification Value
Voltage Rating (BVDSS) 800 V min.
Drain-Source On-State Resistance (RDS(on)) 7 Ω at 25 °C
Operating Frequencies 60 kHz (L type) or 115 kHz (H type)
No-Load Consumption 30 mW at 230 VAC
Package Types SO-16, PDIP 7
Grade Industrial
RoHS Compliance Grade Ecopack2

Key Features

  • 800 V avalanche-rugged power MOSFET for ultra-wide input voltage range
  • Embedded HV startup and sense FET
  • PWM current-mode controller
  • Dual-level overcurrent protection (OCP) with selectable threshold
  • Output overvoltage protection with tight tolerance and digital noise filter
  • Soft-start to reduce stress during startup and increase IC lifetime
  • Automatic restart after a fault condition
  • Thermal shutdown with hysteresis to increase system reliability
  • Jittered frequency to reduce EMI
  • Extra power timer (EPT) to sustain overload conditions for a few seconds

Applications

  • Auxiliary power supply for consumer and home equipment
  • Power supply for energy meters and data concentrators
  • AC-DC adapters

Q & A

  1. What is the voltage rating of the VIPER28HN?

    The VIPER28HN has a voltage rating of 800 V min.

  2. What are the operating frequencies of the VIPER28HN?

    The operating frequencies are 60 kHz (L type) or 115 kHz (H type).

  3. What is the no-load consumption of the VIPER28HN at 230 VAC?

    The no-load consumption is 30 mW at 230 VAC.

  4. What types of packages are available for the VIPER28HN?

    The VIPER28HN is available in SO-16 and PDIP 7 packages.

  5. Does the VIPER28HN have built-in overcurrent protection?

    Yes, it has dual-level overcurrent protection (OCP) with selectable threshold.

  6. How does the VIPER28HN handle thermal issues?

    The device features thermal shutdown with hysteresis to increase system reliability and IC lifetime.

  7. What is the purpose of the extra power timer (EPT) in the VIPER28HN?

    The EPT allows the IC to sustain overload conditions for a few seconds.

  8. Does the VIPER28HN support automatic restart after a fault condition?

    Yes, the IC automatically restarts after a fault condition.

  9. What is the significance of the soft-start feature in the VIPER28HN?

    The soft-start feature reduces the stress during startup and increases IC lifetime.

  10. How does the VIPER28HN reduce EMI?

    The device uses a jittered frequency to reduce EMI.

Product Attributes

Output Isolation:Isolated
Internal Switch(s):Yes
Voltage - Breakdown:800V
Topology:Flyback
Voltage - Start Up:14 V
Voltage - Supply (Vcc/Vdd):8.5V ~ 23.5V
Duty Cycle:80%
Frequency - Switching:115kHz
Power (Watts):16 W
Fault Protection:Current Limiting, Over Temperature, Over Voltage, Short Circuit
Control Features:- 
Operating Temperature:-40°C ~ 150°C (TJ)
Package / Case:8-DIP (0.300", 7.62mm), 7 Leads
Supplier Device Package:7-DIP
Mounting Type:Through Hole
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Similar Products

Part Number VIPER28HN VIPER28LN VIPER25HN VIPER26HN VIPER27HN VIPER28HD VIPER28HE
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Product Status Active Active Obsolete Active Active Active Obsolete
Output Isolation Isolated Isolated Isolated Either Isolated Isolated Isolated
Internal Switch(s) Yes Yes Yes Yes Yes Yes Yes
Voltage - Breakdown 800V 800V 800V 800V 800V 800V 800V
Topology Flyback Flyback Flyback Flyback Flyback Flyback Flyback
Voltage - Start Up 14 V 14 V 14 V 13 V 14 V 14 V 14 V
Voltage - Supply (Vcc/Vdd) 8.5V ~ 23.5V 8.5V ~ 23.5V 8.5V ~ 23.5V 11.5V ~ 23.5V 8.5V ~ 23.5V 8.5V ~ 23.5V 8.5V ~ 23.5V
Duty Cycle 80% 80% - 70% 80% 80% 80%
Frequency - Switching 115kHz 60kHz 225kHz 115kHz 115kHz 115kHz 115kHz
Power (Watts) 16 W 16 W 20 W 20 W 20 W 16 W 16 W
Fault Protection Current Limiting, Over Temperature, Over Voltage, Short Circuit Current Limiting, Over Temperature, Over Voltage, Short Circuit Current Limiting, Over Temperature, Over Voltage Current Limiting, Over Temperature Current Limiting, Over Temperature, Over Voltage Current Limiting, Over Temperature, Over Voltage, Short Circuit Current Limiting, Over Temperature, Over Voltage, Short Circuit
Control Features - - - - - - -
Operating Temperature -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ) -40°C ~ 150°C (TJ)
Package / Case 8-DIP (0.300", 7.62mm), 7 Leads 8-DIP (0.300", 7.62mm), 7 Leads 8-DIP (0.300", 7.62mm), 7 Leads 8-DIP (0.300", 7.62mm), 7 Leads 8-DIP (0.300", 7.62mm), 7 Leads 16-SOIC (0.154", 3.90mm Width) 10-SDIP (0.300", 7.62mm)
Supplier Device Package 7-DIP 7-DIP 7-DIP 7-DIP 7-DIP 16-SO 10-SDIP
Mounting Type Through Hole Through Hole Through Hole Through Hole Through Hole Surface Mount Through Hole

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