VIPER17HN

Overview

The VIPER17HN is an off-line high voltage converter from the VIPerPlus family, designed for flyback topology applications. It integrates an 800 V avalanche-rugged power section with PWM control and a fixed switching frequency of 115 kHz. The device supports a maximum output power of 9 W and delivers an output current of 420 mA. Operating within a supply voltage range of 8.5 V to 23.5 V, it features a maximum duty cycle of 80% and a quiescent operating current of 1.8 mA. Packaged in a DIP-7 through-hole format, it operates reliably across a temperature range of -40°C to +150°C.

Feature Summary

• Integrates an 800 V avalanche-rugged power MOSFET with embedded high-voltage startup circuitry.
• Incorporates advanced frequency jittering to reduce electromagnetic interference filter costs.
• Features comprehensive protection mechanisms including overcurrent limiting, overvoltage protection, and hysteresis thermal shutdown.
• Supports burst mode operation for low standby power consumption compliant with energy-saving regulations.

Applications

• Travel battery chargers for mobile phones and PDAs
• General purpose AC adapters
• Low cost isolated converters

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer marking with official STMicroelectronics documentation. Ensure the DIP-7 package matches the specified physical dimensions and pin configuration. Confirm RoHS compliance status through the specific datasheet revision. Validate that the part number suffix corresponds to the intended through-hole mounting style and performance grade.

Selection Notes

Select this component for designs requiring a fixed 115 kHz switching frequency rather than the 60 kHz variant found in other series members. It is suitable for applications needing up to 9 W output power with isolated flyback topologies. Consider the integrated brown-out function for systems sensitive to low input voltage conditions. Evaluate the thermal management requirements given the wide operating temperature range and self-supply capabilities.

Part Context

The VIPER17HN belongs to the VIPerPlus family of high-performance off-line converters. This series distinguishes itself by integrating the power MOSFET and control logic into a single monolithic IC. The H-type designation indicates a fixed 115 kHz operating frequency, differentiating it from L-type variants. The family emphasizes reduced external component count and enhanced system reliability through built-in protections.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official STMicroelectronics replacement guides or contact technical support for verified alternatives. Direct pin-to-pin replacements may require validation of electrical parameters and thermal characteristics.