Overview
The STMicroelectronics VIPER16LN is an off-line converter belonging to the VIPerPlus family. It features an 800 V avalanche rugged power section and a PWM controller, making it suitable for a variety of high-voltage applications. The device can power itself directly from the rectified mains, eliminating the need for an auxiliary bias winding. It includes advanced features such as frequency jittering to reduce EMI, burst mode operation for low power consumption, and comprehensive protection mechanisms including overcurrent limit, feedback network disconnection protection, hysteretic thermal shutdown, soft start-up, and safe auto-restart after fault conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Transistor Breakdown Voltage (V) | 800 | V |
| Drain Current (A) | 0.4 | A |
| Drain-Source On-State Resistance (RDS(on)) | 24 | Ω |
| Operating Frequency | 60 kHz | kHz |
| Standby Power | < 30 mW at 230 VAC | mW |
| Operating Junction Temperature Range | -40 to 150 | °C |
| Storage Temperature | -55 to 150 | °C |
| Package | DIP-7, SO-16 | |
| RoHS Compliance Grade | Ecopack2 |
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
- Burst mode operation for low power consumption
Applications
- Replacement of capacitive power supply
- Auxiliary power supply for appliances
- Power metering
- LED drivers
Q & A
- What is the breakdown voltage of the VIPER16LN?
The breakdown voltage is 800 V.
- What are the operating frequencies for the VIPER16LN and VIPER16HN?
The VIPER16LN operates at 60 kHz, while the VIPER16HN operates at 115 kHz.
- Does the VIPER16LN 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 VIPER16LN?
The standby power consumption is less than 30 mW at 230 VAC.
- How does the VIPER16LN manage overcurrent conditions?
The device has a limiting current with an adjustable set point, allowing users to define the overcurrent limit.
- What protection mechanisms are built into the VIPER16LN?
The device includes protection against feedback network disconnection, hysteretic thermal shutdown, and safe auto-restart after fault conditions.
- How does the soft-start function work in the VIPER16LN?
The soft-start function progressively increases the cycle-by-cycle current limitation up to the defined IDlim value during start-up, reducing stress on the secondary diode and preventing transformer saturation.
- What is the thermal shutdown mechanism in the VIPER16LN?
The device features hysteretic thermal shutdown to protect against overheating.
- Can the VIPER16LN be used in LED driver applications?
- What are the available packages for the VIPER16LN?
The VIPER16LN is available in DIP-7 and SO-16 packages.
