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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, 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)：16 W
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Overview
The VIPER28LDTR is an off-line converter from the VIPerPlus family, manufactured by STMicroelectronics. It integrates a rugged 800 V power MOSFET with PWM current-mode control in a 16-SOIC package. The device operates on a flyback topology with a switching frequency of 115 kHz and supports a maximum duty cycle of 80%. It delivers up to 20 W output power with an output current of 1.2 A. Operating voltage ranges from 8.5 V to 23.5 V, with a quiescent current of 2.5 mA. It functions within a temperature range of -40°C to 150°C TJ.
Feature Summary
- Integrates an 800 V rugged power section with PWM current-mode control
- Provides two levels of over-current protection for enhanced reliability
- Includes over-voltage, overload, and hysteric thermal protection mechanisms
Applications
- High-voltage AC/DC conversion systems
- Offline power supply designs
- Low-power switcher applications requiring high voltage tolerance
Procurement Notes
Verify the specific suffix LDTR against your schematic requirements to ensure compatibility with surface-mount assembly processes. Confirm that the 16-SOIC package dimensions align with your PCB footprint constraints. Check the latest datasheet for any updates regarding operating temperature limits or protection thresholds before finalizing procurement.
Selection Notes
Select this component when designing isolated flyback converters requiring high voltage withstand capability. It is suitable for applications needing integrated protection features without external discrete components. Ensure the input voltage range fits within the specified 8.5 V to 23.5 V limits for optimal performance.
Part Context
This part belongs to the VIPerPlus series of peak power high-voltage converters. It is designed to simplify power supply design by combining high-voltage switching capabilities with advanced control logic. The series targets cost-sensitive and space-constrained offline applications.
Replacement Considerations
Check for direct pin-compatible substitutes within the same VIPerPlus family. Verify electrical parameters such as breakdown voltage and switching frequency when considering alternative manufacturers.
