Product Overview
TOPSwitch-II 700V Off-Line Switcher IC, 100 kHz, TO-220-3 Package - Power Supply Repair and Replacement
Condition
Unused, New Old Stock (NOS). Leads are clean with no solder or thermal paste residue. Sourced from an electronics distributor consolidating inventory. Covered by the PartsMine No Hassle Guarantee. Evaluation: Visual inspection only. Function testing not performed.
Ships same business day from Idaho. Packed carefully.
Product Overview
Power Integrations TOP224Y is a TOPSwitch-II family three-terminal off-line PWM switcher IC. It integrates a 700V power MOSFET and control logic into a single TO-220-3 package. Operates at a fixed 100 kHz switching frequency. Designed for flyback and forward AC-to-DC converter topologies. Output power range is 30W to 45W depending on input configuration and thermal management. Commonly used in monitors, industrial controls, small appliances, and telecom equipment built from the late 1990s through the 2010s.
Key Features
- 700V maximum drain voltage
- Output power: 30W (85-265 VAC universal input) to 45W (100/115/230 VAC single-voltage input)
- Fixed 100 kHz switching frequency
- TO-220-3 (3-lead) package - "Y" suffix denotes this variant
- Integrates high-voltage MOSFET and PWM control in a single chip
- Overcurrent protection (OCP) built in
- Compatible with flyback and forward converter topologies
- Requires external transformer, optocoupler, and capacitors for a complete SMPS circuit
Applications
- Replacement IC for failed switch-mode power supply boards in legacy and vintage electronics
- AC-to-DC power converters in CRT and LCD monitors
- Industrial control and telecom equipment power supplies
- Small appliance and consumer electronics power boards
Frequently Asked Questions
Is this the 3-lead TO-220 package, or an 8-lead version?
This is the TO-220-3 (3-lead) package. The "Y" suffix in TOP224Y specifically identifies this variant. If your board uses an 8-lead package, this part is not compatible.
Will this drop in for other TOPSwitch families like JX, HX, or GX?
No. TOPSwitch-II parts are not drop-in replacements for newer TOPSwitch families. Pinout functions, frequency, and power limits differ. This part is intended as a direct replacement for other TOP224Y ICs.
How can I confirm this part is genuine and unused?
Leads show no solder or thermal paste residue consistent with an unmounted part. Sourced from a distributor inventory consolidation. Visual inspection confirmed clean condition. Function testing not performed - verify against the Power Integrations TOP224Y datasheet before installation.
What external components does this IC require?
A complete SMPS circuit requires a flyback or forward transformer, optocoupler for feedback isolation, and filtering capacitors. The TOP224Y alone does not constitute a complete power supply.
Primarily a repair and replacement part for existing designs. Confirm your board's package footprint and power requirements against the Power Integrations TOP224Y datasheet before ordering.
