10 W offline switcher with 800 V avalanche-rugged MOSFET
The VIPER16LN integrates a 800 V avalanche-rugged power MOSFET with a PWM controller in a single 7-lead DIP package, delivering up to 10 W in flyback, buck, or buck-boost topologies. The 60 kHz fixed switching frequency keeps the transformer small and the EMI predictable — no external frequency-setting resistor needed. The 70 % maximum duty cycle and 11.5 V to 23.5 V supply range suit universal offline inputs (85–265 VAC) with enough headroom for brownout conditions. The 13 V start-up threshold ensures clean power-on sequencing without external start-up resistors.
Built-in protection reduces BOM count
Current limiting and over-temperature protection are integrated — no external sense resistor or thermal shutdown circuit. The output isolation is configurable as either isolated (opto-coupler feedback) or non-isolated, giving the layout engineer one footprint for both designs. The through-hole 7-DIP package (0.300-inch body) allows manual prototyping and rework without hot-air equipment.
The base product number VIPER16 covers multiple package and tape options, so the same die is available in surface-mount (SO-8) if a future board shrink requires it.