Viper22a SMPS Controller IC

🔹 VIPER22A SMPS Controller IC – Low Power Offline Primary Switcher

The VIPER22A is a low-power offline SMPS primary switcher IC that integrates a current-mode PWM controller and a high-voltage power MOSFET on a single chip . It is widely used in AC-DC converters for battery chargers, standby power supplies, and auxiliary power systems .

✅ Specifications:

Operating Voltage (VDD): 9V – 38V

Drain-Source Voltage: 730V

Switching Frequency: 60kHz (fixed)

Peak Current Limit: 0.7A (typical)

Package Options: DIP-8 (through-hole) and SO-8 (surface mount)

Fall / Rise Time: 100ns / 50ns

Operating Temperature: -40°C to +125°C

📦 Features:
✔️ Integrated 730V power MOSFET and PWM controller
✔️ Current-mode control for improved regulation
✔️ High-voltage startup current source (no external startup resistor needed)
✔️ Auto-restart protection for over-temperature, over-current, and over-voltage conditions
✔️ Auxiliary undervoltage lockout (UVLO) with hysteresis

📦 Applications:
✔️ Battery charger adapters
✔️ Standby power supplies for TVs and monitors
✔️ Auxiliary power supplies for motor control systems
✔️ LED driver power supplies
✔️ Low-power SMPS circuits (up to ~7W output power)