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Product Detailed Parameters
- Description：IC OFFLINE SWITCH FLYBACK 16SO
- Series：VIPer™ plus
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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：60kHz
- Fault Protection：Current Limiting, Over Temperature, Over Voltage
- 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 VIPER37LDTR is an offline converter from the VIPerPlus family, designed for high-performance flyback applications. It integrates a rugged 800V power MOSFET and PWM control circuitry in a 16-SO package. The device operates at a fixed switching frequency of 60kHz with a maximum duty cycle of 80%. It supports a supply voltage range of 8.5V to 23.5V and delivers up to 20W of output power. Key electrical specifications include an 800V breakdown voltage, a 14V startup threshold, and a maximum operating junction temperature of 150°C.
Feature Summary
- Integrates an 800V avalanche-rugged power MOSFET for ultra-wide input voltage ranges.
- Includes advanced protection features such as two-level overcurrent protection, overvoltage protection, and hysteretic thermal shutdown.
- Features safe auto-restart capability following fault conditions and onboard soft-start functionality.
- Utilizes frequency jittering technology to reduce electromagnetic interference filter costs.
Applications
- Offline AC/DC converters
- Flyback topology power supplies
- High-voltage converter circuits
Procurement Notes
Verify the specific suffix 'L' indicates tape and reel packaging when ordering. Confirm that the component meets RoHS3 compliance requirements for your assembly process. Ensure the 16-SOIC package dimensions align with your PCB footprint design. Check for moisture sensitivity level 3 handling requirements during storage and reflow soldering procedures.
Selection Notes
Select this component for designs requiring a fixed 60kHz switching frequency and integrated high-voltage startup. Consider its 20W power capability and 800V rating for robust operation across wide input voltage ranges. Evaluate the need for its specific protection suite, including primary current protection and brownout detection, against system safety requirements.
Part Context
This part belongs to the VIPerPlus series of offline converters from STMicroelectronics. It shares architectural similarities with other members like the VIPER37HE but differs in packaging and specific operational parameters. The series is characterized by high integration levels, combining power and control functions into a single monolithic chip to simplify design and reduce component count.
Replacement Considerations
The VIPER27LD is listed as a parameter-equivalent substitute. Verify compatibility regarding power output limits and pin configuration before implementation. Ensure that any replacement maintains the required 800V breakdown voltage and 16-SO package constraints for direct board fit.
