TOP222P Three-terminal Off-line PWM Switch 9V 100mA DIP-8

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TOP222P Three-terminal Off-line PWM Switch 9V 100mA DIP-8 The TOP222P is part of the TOPSwitch-II family of three-terminal off-line PWM switches. It integrates a high-voltage power MOSFET, PWM controller, high-voltage startup circuit, loop compensation, current limiting, auto-restart, and thermal protection into a single IC, reducing the number of external components required for a switching power supply. The device is designed for high-efficiency power conversion and can be used in flyback, forward, boost, and buck topologies. The TOP222P uses an 8-lead PDIP package, with multiple SOURCE pins providing the primary-side return and helping transfer heat directly into the PCB. It operates with primary-side or optocoupler feedback and supports both discontinuous and continuous conduction modes. The internal oscillator operates at a nominal 100 kHz, while cycle-by-cycle current limiting, auto-restart, and thermal shutdown provide protection during overload and fault conditions. Features: Integrated high-voltage power MOSFET and PWM controller. Three-terminal switching architecture. Integrated high-voltage startup circuit. Built-in current limiting. Auto-restart protection. Thermal shutdown protection. Integrated loop compensation functions. Supports primary-side and optocoupler feedback. Suitable for flyback, forward, boost, and buck topologies. Supports continuous and discontinuous conduction operation. 8-lead PDIP package with PCB heat transfer through the SOURCE pins. Designed for reduced external component count. Controlled MOSFET gate drive for reduced common-mode EMI. Specifications: Specification Value Part Number TOP222P Family TOPSwitch-II Function Three-terminal off-line PWM switch Package 8-lead PDIP Package Outline P08A Package Type Through-hole Internal Power Device High-voltage MOSFET Nominal Oscillator Frequency 100 kHz Input Range 85–265 VAC universal input* Single-Voltage Input Range 100/115/230 VAC ±15% Maximum DRAIN Voltage 700 V CONTROL Voltage -0.3 to 9 V CONTROL Current 100 mA maximum Operating Junction Temperature -40 to 150 °C Thermal Shutdown Temperature Typically 135 °C Shunt Regulator Voltage 5.5–6.0 V, 5.7 V typical Maximum Practical Output Power, 85–265 VAC 15 W Maximum Practical Output Power, 100/115/230 VAC ±15% 25 W Current Limit, Typical 1.50 A Initial Current Limit, Typical 0.50 A Breakdown Voltage 700 V minimum Source Pins Multiple SOURCE connections for the PDIP package Pinout: Pin Function Description 1 SOURCE Primary-side circuit common and reference 2 SOURCE Primary-side circuit common and reference 3 SOURCE (HV RTN) High-voltage MOSFET source return 4 CONTROL Feedback, bias supply, compensation, and auto-restart connection 5 DRAIN High-voltage MOSFET drain connection 6 SOURCE (HV RTN) High-voltage MOSFET source return 7 SOURCE (HV RTN) High-voltage MOSFET source return 8 SOURCE (HV RTN) High-voltage MOSFET source return Applications: AC-DC switching power supplies. Flyback converters. Standby power supplies. Compact power adapters. Consumer electronic power supplies. TV and monitor power supplies. Audio amplifier power supplies. Auxiliary and standby power circuits. Low-power universal-input power supplies. Isolated power supplies using optocoupler feedback. Package Included: 1 × TOP222P Three-terminal Off-line PWM Switch 9V 100mA DIP-8. Documents: TOP222P Datasheet.