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Product Detailed Parameters
- Description：IC OFFLINE SWITCH FLYBACK 16SO
- Series：VIPer™ plus
- Mfr：STMicroelectronics
- Package：Tube
- 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
- Fault Protection：Current Limiting, Over Temperature, Over Voltage, Short Circuit
- Control Features：-
- Operating Temperature：-40°C ~ 150°C (TJ)
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：16-SO
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Power (Watts)：20 W
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Overview
The VIPER38HD is a high-voltage AC/DC converter from the VIPerPlus family, integrating an 800 V rugged power MOSFET with PWM current-mode control. It operates at a fixed frequency of 115 kHz with a maximum duty cycle of 80%. The device supports a flyback topology and delivers up to 18 W output power. Input voltage ranges from 8.5 V to 23.5 V, while quiescent current is 3.5 mA. It functions within a temperature range of -40 °C to +150 °C and is housed in a SOIC-Narrow-16 package.
Feature Summary
- Integrates an 800 V avalanche-rugged power MOSFET for ultra-wide input voltage range
- Features adjustable extra power timer (EPT) to sustain overload conditions temporarily
- Includes dual-level overcurrent protection and thermal shutdown with hysteresis
- Utilizes jittered frequency operation to reduce electromagnetic interference
Applications
- Isolated flyback converters for metering applications
- US range 85–132 V AC offline power supplies
- High-efficiency low standby consumption adapters
Procurement Notes
Verify the specific suffix 'HD' confirms the 115 kHz switching frequency variant distinct from the 'LE' or 'LD' types. Confirm RoHS compliance status via official datasheets as packaging details may vary. Ensure the SOIC-Narrow-16 package matches your PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component when designing flyback converters requiring a 115 kHz switching frequency. It is suitable for applications demanding high input voltage tolerance up to 800 V breakdown limits. Consider the 18 W peak power capability and the integrated protections for robust system design without external complex circuitry.
Part Context
The VIPER38HD belongs to the VIPerPlus family of peak power fixed-frequency high-voltage converters by STMicroelectronics. This series combines a high-voltage power MOSFET with intelligent control logic to minimize external component count. The HD suffix specifically denotes the 115 kHz operating frequency option within the broader VIPER38 product line.
Replacement Considerations
The VIPER38LE serves as a functional alternative offering identical electrical performance but operates at a 60 kHz frequency. Both devices share the same pinout and integration features, allowing for potential board-level substitution if frequency constraints permit.
