TOP247YN Converter Offline Flyback Topology TO-220-7C for Power Supply Unit
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TOP247YN Offline Flyback Converter | TOPSwitch-GX EcoSmart Integrated Switcher 66 / 132 kHz in TO-220-7C Package with Soft-Start, Frequency Jittering and Multi-Layer Fault Protection for Mining PSU Auxiliary Rails and Standby Supplies
The TOP247YN is a high-performance offline flyback converter in TO-220-7C package — the auxiliary / standby rail controller across multiple mining PSU designs. The TOPSwitch-GX EcoSmart integrated switcher family combines the high-voltage MOSFET, controller, and protection in a single IC, simplifying flyback PSU design and reducing component count for repair work.
Operating with flyback topology at 66 kHz or 132 kHz switching frequency, the TOP247YN delivers optimal power conversion efficiency while reducing system cost. Soft-start provides controlled startup behavior — gradual voltage ramp prevents inrush stress on input rail. Frequency jittering minimizes electromagnetic interference (EMI) signature — important for FCC / CE compliance and lower noise in mining facility electrical infrastructure. Wider DCMAX for improved power delivery vs older TOPSwitch generations. Integrated fault protection includes current limiting, over-temperature shutdown, and over-voltage protection — multi-layer protection for the auxiliary / standby rail when downstream loads short-circuit.
Typical Use in Mining PSU Repair
- Auxiliary rail flyback failure — TOP247YN typically powers the housekeeping rail in mining PSUs.
- Standby supply replacement — for 5V / 12V standby rails that supply control circuitry.
- Off-line flyback designs — general-purpose 66 / 132 kHz flyback IC for industrial / commercial PSUs.
- EMI-sensitive applications — the frequency jittering helps designs targeting EMI margin.
- Production refurbishment — bulk TOP247YN stock for high-volume PSU rebuild workflow.
TOP247YN Specifications
| Feature | Specification |
|---|---|
| Part Number | TOP247YN |
| Category | Integrated Circuits — Power Management (PMIC) |
| Type | AC/DC Converter — Offline Switcher (TOPSwitch-GX EcoSmart family) |
| Topology | Flyback (isolated) |
| Switching Frequency | 66 kHz / 132 kHz |
| Package | TO-220-7C |
| Output Isolation | Isolated |
| Internal Switch | Yes (integrated high-voltage MOSFET) |
| EMI Reduction | Frequency jittering + wider DCMAX |
| Protection | Current limit + Over-temperature + Over-voltage + Soft-start |
| Packaging | Tube |
| Condition | Brand New |
FAQ — TOP247YN Converter
Q: How do I diagnose a failed TOP247YN on PSU?
A: Typical signs: auxiliary / standby rail (5V or 12V) absent at the secondary side, PSU main rails won't start because the control circuitry has no power, audible burn-smell from the IC, or visible blackening on the TO-220-7C package. Test by measuring DC voltage on the standby rail with PSU plugged in — should match nameplate spec.
Q: Can I substitute another TOPSwitch family member?
A: TOPSwitch-GX family members (TOP242-TOP250) share pinout and basic operation but differ in current rating and frequency options. TOP247YN sits mid-range. For exact OEM-spec PSU repair, stick with TOP247YN. For prototyping or non-critical use, adjacent family members may work with verified current rating.
Q: What's the difference between TOP247YN and TOP247Y?
A: The suffix letter (YN vs Y) typically indicates package or lead-finish variation. TOP247YN is the standard TO-220-7C through-hole version. Functionally equivalent for repair use — verify your PCB's pin layout matches the package before ordering.
Q: Bulk pricing for PSU repair shops?
A: Yes — email contact@lys-sz.com with your monthly PSU repair volume for tier pricing on TOP247YN by the tube.
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PSU repair shops stocking TOP247YN by the tube? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouses.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
