VIPER17LN

Overview

The VIPER17LN is an off-line high voltage converter from the VIPerPlus family, designed for AC/DC conversion using a flyback topology. It integrates an 800 V rugged power section with PWM control and operates at a fixed frequency of 60 kHz. The device supports a maximum output power of 9 W and delivers up to 420 mA output current. It functions within a supply voltage range of 8.5 V to 23.5 V, with a maximum duty cycle of 80%. Key electrical parameters include a minimum operating temperature of -40°C and a maximum of +150°C, alongside a typical operating supply current of 1.8 mA.

Feature Summary

• Integrates an 800 V avalanche rugged power section for high-voltage operation
• Features burst mode operation and low consumption to meet standby energy saving regulations
• Includes advanced frequency jittering to reduce EMI filter costs
• Provides safe auto-restart after fault condition removal and hysteresis thermal protection

Applications

• LCD TVs
• DVD players
• Set-top boxes

Procurement Notes

Verify the specific suffix 'L' confirms the 60 kHz switching frequency variant, distinct from other family members. Confirm the DIP-7 through-hole package matches the target PCB layout requirements. Ensure RoHS compliance documentation is reviewed for environmental standards. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current production status before finalizing procurement orders.

Selection Notes

Select this component for designs requiring a compact, single-stage off-line converter with integrated high-voltage startup. The fixed 60 kHz frequency suits applications where EMI filtering needs are managed via jittering rather than variable frequency spread spectrum. Consider the 9 W power limit and 420 mA output capability when sizing external magnetics. The wide operating temperature range supports robust industrial or consumer environments without additional derating.

Part Context

The VIPER17LN belongs to the VIPerPlus family of high-performance off-line converters. This series combines a high-voltage MOSFET with a current-mode PWM controller in a single monolithic IC. The 'L' designation specifically indicates the 60 kHz operating frequency version, differentiating it from higher-frequency variants like the VIPER17H. It is categorized under PMIC - Power Management ICs as an isolated AC/DC converter.

Replacement Considerations

Consult official STMicroelectronics substitution guides for pin-compatible alternatives within the VIPerPlus family. Verify that any substitute maintains the 60 kHz frequency specification if EMI filter compatibility is critical. Ensure the replacement device supports the required 800 V breakdown voltage and similar thermal protection features.