SLUC582 — UCC24630 Design Calculator
Unterstützte Produkte und Hardware
Produkte
AC/DC controllers
- UCC24630 — Synchroner Gleichrichtercontroller mit extrem niedrigem Standby-Strom
The UCC24630 SR controller is a high-performance controller and driver for N-channel MOSFET power devices used for secondary-side synchronous rectification.
The combination of controller and MOSFET emulates a near-ideal diode rectifier. This solution not only directly reduces power dissipation of the rectifier but also reduces primary-side losses as well, due to compounding of efficiency gains.
Utilizing a volt-second balancing control method, the UCC24630 is ideal for flyback power supplies over a wide-output voltage range since the device is not connected directly to the MOSFET drain. The SR drive turn-off threshold is not dependent on the MOSFET RDS(on) which allows optimizing for maximum conduction time. Also secondary current ringing due to device and layout inductance does not affect the SR turn-off threshold.
The UCC24630 controller offers a programmable false-trigger filter, a frequency detector to automatically switch to standby mode during low power conditions and pin fault protections. The UCC24630 is compatible with DCM, TM and CCM operation.
The wide VDD operating range, wide programming range of the VPC voltage and blanking time, allows use in a variety of flyback converter designs.
| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | UCC24630 Synchronous Rectifier Controller With Ultra-Low-Standby Current datasheet (Rev. A) | PDF | HTML | 30 Mär 2015 |
| Application note | UCC24630 and UCC24636 SR-Control Configurations Guide | 18 Dez 2017 | ||
| Technical article | Achieving low standby power and high efficiency in flyback converters | PDF | HTML | 27 Jul 2015 |
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This is a high efficiency 65W AC/DC design using UCC24630 Synchronous Rectification Controller for a Universal input (85Vac to 265Vac) to 19.5V @3.33A output exceeding CoC-5 Tier2 and DOE Level VI performance requirements for external power supplies.
| Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
|---|---|---|
| SOT-23 (DBV) | 6 | Ultra Librarian |
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