TOP257EN Power Integrations Integrated Circuit (Other) In Stock
The TOP257EN is an off-line switcher IC from Power Integrations capable of delivering up to 157 W output power in a 6-pin ESIP-7C package. It integrates high-voltage MOSFET, PWM controller, and protection features for energy-efficient AC-DC power supply designs.
- Manufacturer
- Power Integrations
- Package
- Other
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- TOP257EN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.2900(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TOP257EN?
- Up to 157 W continuous output power in a compact 6-pin ESIP-7C package, reducing transformer and PCB size
- Integrated high-voltage power MOSFET and PWM controller with cycle-by-cycle current limiting and auto-restart protection
- High-efficiency operation with accurate line and load regulation, meeting energy-efficiency standards for adapter and SMPS designs
What is TOP257EN used for?
The TOP257EN is designed for offline flyback and forward AC-DC power supplies in consumer electronics adapters, set-top boxes, and appliance power stages requiring up to 157 W. Its integrated high-voltage MOSFET and protection circuits simplify the BOM and reduce component count in industrial and white-goods power supply designs. Engineers use it in open-frame and enclosed SMPS modules where thermal performance and high reliability under wide input voltage (85 VAC to 265 VAC) are required.
What are the specifications of TOP257EN?
| Factory Lead Time | 8Weeks |
| YTEOL | 7 |
| Analog IC - Other Type | LOAD SWITCH |
| JESD-609 Code | e3 |
| Qualification Status | Not Qualified |
| Terminal Finish | Matte Tin (Sn) |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China |
Where can I find the TOP257EN datasheet?
TOP257EN Datasheet DownloadOfficial datasheet from Power Integrations
What are equivalent replacements for TOP257EN?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum continuous output power the TOP257EN can deliver in a typical flyback converter?
The TOP257EN supports up to 157 W of continuous output power in a flyback topology, making it suitable for mid-power AC-DC adapters and open-frame supplies. Its integrated 700 V MOSFET handles the high-voltage switching transitions without an external power transistor, simplifying the design significantly.
Which input voltage range does the TOP257EN support, and can it handle both 115 VAC and 230 VAC mains?
The TOP257EN is rated for a universal AC input range of 85 VAC to 265 VAC, covering both 115 VAC North American and 230 VAC European mains standards. This wide input range eliminates the need for a voltage-selector switch or separate regional power supply SKUs in global product designs.
What protection features are built into the TOP257EN, and how do they reduce system design risk?
The TOP257EN integrates cycle-by-cycle current limiting, auto-restart under fault conditions, and thermal shutdown at approximately 135 °C junction temperature. These on-chip protections remove the need for external current-sense resistors and soft-start circuitry, cutting BOM cost and shortening time-to-compliance for safety certifications such as IEC 60950 and UL 60950.
How does the ESIP-7C package of the TOP257EN aid thermal management in a compact power supply?
The 6-pin ESIP-7C package includes an exposed thermal pad on the bottom, allowing direct heat transfer to the PCB copper pour or an external heatsink clip. This enables the TOP257EN to dissipate sufficient power for 157 W designs without requiring a bulky discrete heatsink assembly, keeping the power supply footprint small.
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Why Buy from FindMyChip
About Power Integrations
Power Integrations is a leading electronic component manufacturer. FindMyChip sources Power Integrations ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.0200 | $2.02 |
| 25+ | $1.4000 | $35.00 |
| 96+ | $1.3500 | $129.60 |
| 288+ | $1.3400 | $385.92 |
| 480+ | $1.3000 | $624.00 |
| 1200+ | $1.2900 | $1548.00 |
In Stock · 24h Response · Worldwide Shipping
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