Overview
The VIPER16HD, produced by STMicroelectronics, is an off-line converter belonging to the VIPer™ plus family. It features an 800 V avalanche rugged power section, a PWM controller, and various protection mechanisms. This device can power itself directly from the rectified mains, eliminating the need for an auxiliary bias winding. It incorporates advanced frequency jittering to reduce EMI filter costs and operates in burst mode to meet energy-saving regulations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Drain-to-source (ground) voltage (VDRAIN) | 800 | V |
| Repetitive avalanche energy (EAV) | 2 | mJ |
| Repetitive avalanche current (IAR) | 1 | A |
| Pulse drain current (IDRAIN) | 2.5 | A |
| Operating frequency (VIPER16H) | 103-127 | kHz |
| Operating frequency (VIPER16L) | 54-66 | kHz |
| Supply voltage range (VDD) | 11.5-23.5 | V |
| Standby power at 230 VAC | < 30 | mW |
| Thermal shutdown temperature (TSD) | 150-160 | °C |
| Thermal shutdown hysteresis (THYST) | 30 | °C |
| Drain-source on-state resistance (RDS(on)) | 20-48 | Ω |
Key Features
- 800 V Avalanche Rugged Power Section: Ensures high voltage handling capability.
- PWM Operation with Frequency Jittering: Reduces EMI filter costs by spreading the energy of each harmonic over a number of sideband harmonics.
- Operating Frequencies: 60 kHz for L type and 115 kHz for H type.
- No Auxiliary Winding Needed: For low power applications, it can power itself directly from the rectified mains.
- Low Standby Power: Less than 30 mW at 230 VAC.
- Adjustable Current Limit: Allows setting the drain current limitation to a lower value than the default.
- On-board Soft-Start: Progressively increases the cycle-by-cycle drain current limit during start-up.
- Safe Auto-Restart: After a fault condition, the device safely restarts.
- Hysteretic Thermal Shutdown: Protects the device from overheating.
Applications
- Replacement of Capacitive Power Supply: Suitable for applications where capacitive power supplies are traditionally used.
- Auxiliary Power Supply for Appliances: Ideal for providing auxiliary power in various appliances.
- Power Metering: Used in power metering applications due to its high accuracy and reliability.
- LED Drivers: Can be used to drive LEDs efficiently with low EMI and high reliability.
Q & A
- What is the maximum drain-to-source voltage of the VIPER16HD?
The maximum drain-to-source voltage (VDRAIN) is 800 V.
- What are the operating frequencies of the VIPER16HD?
The operating frequencies are 60 kHz for the L type and 115 kHz for the H type.
- Does the VIPER16HD require an auxiliary bias winding?
No, it can power itself directly from the rectified mains, eliminating the need for an auxiliary bias winding.
- What is the standby power consumption of the VIPER16HD at 230 VAC?
The standby power consumption is less than 30 mW at 230 VAC.
- How does the VIPER16HD handle overcurrent conditions?
The device includes a current mode PWM controller with adjustable current limit set points and protection against overcurrent conditions.
- What is the thermal shutdown temperature of the VIPER16HD?
The thermal shutdown temperature (TSD) is between 150°C and 160°C.
- How does the soft-start function work in the VIPER16HD?
The soft-start function progressively increases the cycle-by-cycle drain current limit during start-up to reduce stress on the secondary diode and prevent transformer saturation.
- What is the purpose of frequency jittering in the VIPER16HD?
Frequency jittering reduces EMI filter costs by spreading the energy of each harmonic over a number of sideband harmonics.
- Can the VIPER16HD be used in LED driver applications?
- What are some common applications of the VIPER16HD?
