Overview
The VIPER26LD, produced by STMicroelectronics, is a smart high voltage converter that integrates an 800 V avalanche-rugged power MOSFET with PWM current mode control. This device is part of the VIPer plus family and is designed to meet stringent energy-saving standards with very low 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 | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Transistor Breakdown Voltage (V) | 800 | - | - | V |
| Drain Current (A) | - | 0.7 | - | A |
| RDS(on) (Ω) | - | - | 7 | Ω |
| Switching Frequency | 54 | 60 | 66 | kHz (L type) |
| Switching Frequency | 103 | 115 | 127 | kHz (H type) |
| Supply Voltage | - | - | Self limited | V |
| Operating Temperature (°C) | -40 | - | 150 | °C |
| Power Dissipation @ Tamb < 40 °C (DIP7) | - | - | 1 | W |
| Power Dissipation @ Tamb < 60 °C (SO16N) | - | - | 1.5 | W |
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 VIPER26LD?
The breakdown voltage of the power MOSFET is 800 V.
- What are the typical switching frequencies of the VIPER26LD?
The switching frequencies are 60 kHz ±4 kHz (L type) and 115 kHz ±8 kHz (H type).
- What is the maximum drain current of the VIPER26LD?
The maximum drain current is 0.7 A.
- What is the RDS(on) of the power MOSFET?
The RDS(on) is typically 7 Ω.
- What are the operating temperature ranges for the VIPER26LD?
The operating temperature range is from -40°C to 150°C.
- What types of converters does the VIPER26LD support?
The VIPER26LD supports flyback, buck, and buck-boost converters.
- What is the purpose of the jittered switching frequency?
The jittered switching frequency reduces the EMI filter cost by distributing the energy of each harmonic over a number of sideband harmonics.
- Does the VIPER26LD have built-in protection features?
Yes, it includes protections with automatic restart for overload/short-circuit (OLP) and feedback loop disconnection.
- What is the soft-start time of the VIPER26LD?
The soft-start time is internally fixed to approximately 8.5 ms.
- Is the VIPER26LD RoHS compliant?
Yes, the VIPER26LD is RoHS compliant.
