Overview
The VIPER16HDTR, produced by STMicroelectronics, is an off-line converter belonging to the VIPer™ plus family. This device features an 800 V avalanche rugged power section, a PWM controller, and various protection mechanisms. It is designed to operate directly from the rectified mains, eliminating the need for an auxiliary bias winding. The VIPER16HDTR is known for its low EMI due to frequency jittering, low standby power consumption, and compliance with energy-saving regulations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Break-down voltage (VBVDSS) | 800 | V |
| Drain-source on state resistance (RDS(on)) at TJ = 25 °C | 20 - 24 | Ω |
| Operating frequency (FOSC) | 60 kHz (L type), 115 kHz (H type) | kHz |
| Standby power at 230 VAC | < 30 | mW |
| Operating voltage range (VDD) | 11.5 - 23.5 | V |
| Thermal shutdown temperature (TSD) | 150 - 160 | °C |
| Thermal shutdown hysteresis (THYST) | 30 | °C |
| Package | SO-16 | |
| Packing Type | Tape and reel |
Key Features
- 800 V avalanche rugged power section
- PWM operation with frequency jittering for low EMI
- No need for auxiliary winding for low power applications
- Standby power < 30 mW at 230 VAC
- Limiting current with adjustable set point
- On-board soft-start
- Safe auto-restart after a fault condition
- Hysteretic thermal shutdown
Applications
- Replacement of capacitive power supply
- Auxiliary power supply for appliances
- Power metering
- LED drivers
Q & A
- What is the breakdown voltage of the VIPER16HDTR?
The breakdown voltage (VBVDSS) is 800 V.
- What are the operating frequencies of the VIPER16HDTR?
The operating frequencies are 60 kHz for the L type and 115 kHz for the H type.
- Does the VIPER16HDTR require an auxiliary bias winding?
No, it does not require an auxiliary bias winding for low power applications.
- What is the standby power consumption of the VIPER16HDTR at 230 VAC?
The standby power consumption is less than 30 mW at 230 VAC.
- What protection mechanisms are included in the VIPER16HDTR?
The device includes protection against feedback network disconnection, hysteretic thermal protection, and safe auto-restart after a fault condition.
- What is the thermal shutdown temperature of the VIPER16HDTR?
The thermal shutdown temperature (TSD) is between 150 °C and 160 °C.
- What is the package type of the VIPER16HDTR?
The package type is SO-16.
- How is the VIPER16HDTR packed?
The device is packed in tape and reel.
- What is the purpose of the soft-start feature in the VIPER16HDTR?
The soft-start feature progressively increases the cycle-by-cycle drain current limit during start-up to reduce stress on the secondary diode and prevent transformer saturation.
- How does the frequency jittering in the VIPER16HDTR reduce EMI?
The frequency jittering spreads the energy of each harmonic of the switching frequency over a number of sideband harmonics, reducing the amplitude of each harmonic and thus lowering EMI.
