Overview
The VIPER26LN, part of the VIPer plus family from STMicroelectronics, is a smart high voltage converter that integrates an 800 V avalanche-rugged power MOSFET with PWM current mode control. This device is designed to meet stringent energy-saving standards with very low power consumption and burst mode operation under light load conditions. It supports the design of flyback, buck, and buck-boost converters, and features an integrated HV startup, sense-FET, error amplifier, and oscillator with jitter, allowing for complete application designs with a minimum number of components.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Transistor Breakdown Voltage (V) | 800 | V |
| Drain Current (A) | 0.7 | A |
| RDS(on) (Ω) | 7 | Ω |
| Switching Frequency | 60 kHz ±4 kHz | kHz |
| Standby Power | < 50 mW @ 265 VAC | mW |
| Thermal Shutdown Temperature | 150 - 160 °C | °C |
| Operating Junction Temperature Range | -40 to 150 °C | °C |
| Package | DIP-7, SO16 narrow |
Key Features
- 800 V avalanche rugged power MOSFET allowing a wide range of VAC input to be covered
- Embedded HV startup and sense-FET
- Current mode PWM controller
- Minimized system input power consumption: less than 30 mW @ 230 VAC in no-load condition and less than 400 mW @ 230 VAC with 250 mW load
- Limiting current with adjustable set point
- Jittered switching frequency to reduce EMI filter cost: 60 kHz ±4 kHz (L type) and 115 kHz ±8 kHz (H type)
- Embedded error amplifier
- Hysteretic thermal shutdown
- Built-in soft-start for improved system reliability
- Protections with automatic restart: overload/short-circuit (OLP), feedback loop disconnection
Applications
- Auxiliary power supply for appliances
- Power metering
- LED drivers
- SMPS for set-top boxes, DVD players, and recorders
Q & A
- What is the breakdown voltage of the power MOSFET in the VIPER26LN?
The breakdown voltage of the power MOSFET is 800 V.
- What are the typical switching frequencies for the VIPER26LN?
The switching frequency is internally fixed at 60 kHz ±4 kHz.
- What is the standby power consumption of the VIPER26LN?
The standby power consumption is less than 50 mW at 265 VAC.
- Does the VIPER26LN have built-in thermal protection?
Yes, it features hysteretic thermal shutdown.
- What types of converters can be designed using the VIPER26LN?
The device supports the design of flyback, buck, and buck-boost converters.
- How does the VIPER26LN reduce EMI?
The device uses jittered switching frequency to reduce EMI filter cost.
- What is the purpose of the soft-start feature in the VIPER26LN?
The soft-start feature progressively increases the cycle-by-cycle drain current limit to reduce stress on the secondary diode during startup.
- Does the VIPER26LN have automatic restart after fault conditions?
Yes, it has protections with automatic restart for overload/short-circuit (OLP) and feedback loop disconnection.
- What is the operating junction temperature range of the VIPER26LN?
The operating junction temperature range is -40 to 150 °C.
- What packages are available for the VIPER26LN?
The device is available in DIP-7 and SO16 narrow packages.
