TOP223Y Offline PWM Switcher IC

TOPSwitch-II family introduced by Power Integrations designed as the latest generation of its industry-leading TOPSwitch series of off-line switcher ICs. It’s essentially a three-pin integrated circuit with all of the features needed for an off-line switching mode control system. These are N-channel high voltage power MOSFETs with a controlled turn-on gate driver, voltage mode PWM controller with integrated 100 kHz oscillator, high voltage start-up bias circuit, bandgap derived reference, bias shunt regulator/error amplifier for loop compensation, and fault protection circuitry. This opens up numerous new uses for TOPSwitch technology, including as televisions, monitors, and audio amplifiers.

Meanwhile, it boosts the device’s efficiency and productivity while also ensuring its high dependability. while also increasing system efficiency and dependability TOP223Y Off-line PWM Switch IC is specifically developed for use in 100/115/230 VAC off-line Power Supply applications ranging from 100 to 150 W. Also suitable for 50 to 90 W off-line power factor correction (PFC) applications in the range of 85-265 VAC.

TOPSwitch is a current-to-duty cycle converter with an open drain output that is self-biased and guarded. This IC achieves high efficiency by utilizing CMOS technology and integrating as many functionalities as feasible. When compared to bipolar or discrete solutions, the CMOS greatly reduces bias currents. Furthermore, the Integration removes the need for external power resistors for current sensing and/or initial start-up bias current. The inner output MOSFET duty cycle reduces linearly with increased CONTROL pin current during normal operation. The DRAIN and CONTROL pins each execute many roles to accomplish all of the necessary control, bias, and protection functions.