UCC24612 is a high performance synchronous rectifier controller and driver for standard and logic-level N-channel MOSFET power devices. By implementing a near-ideal diode emulation UCC24612 reduces losses of the output rectifier and indirectly the primary side losses. The drain to source (VDS) sensing control scheme allows UCC24612 to work with multiple topologies, such as Active Clamp Flyback, QR/DCM/CCM Flyback and LLC, et.
Integrated features simplify the design effort, enabling UCC24612 to excel in a variety of applications and frequencies. The wide operating VDD and VD voltage ranges enable simple implementation in systems with outputs up to 28 V. Efficiency and noise immunity is enhanced with adaptive minimum off-time. Variants UCC24612-1 and UCC24612-2 offer different minimum on-times to provide additional noise immunity. Robust operation in continuous conduction mode (CCM) is further enhanced with proportional gate-drive and CCM cycle limit pre-turn-off.
UCC24612 has multiple features that improve efficiency. The fast comparator with short propagation delays reduces switching loss. The 9.5-V gate drive clamp reduces MOSFET driving losses. Frequency dependent standby modes further decreases standby power. These features help UCC24612 be part of a greater system that meets stringent efficiency standards such as Department of Energy (DoE) Level VI and Code of Conduct (CoC) Tier 2.
UCC24612 is available in a SOT23-5 package.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCC24612 High Frequency Synchronous Rectifier Controller datasheet (Rev. A) | PDF | HTML | 13 Feb 2018 |
| Technical article | 高頻共振轉換器設計考量，第 2 部分 | PDF | HTML | 15 Mar 2024 | |
| Technical article | 고주파 공진 컨버터 설계 고려 사항, 2부 | PDF | HTML | 15 Mar 2024 | |
| Technical article | High-frequency resonant converter design considerations, Part 2 | PDF | HTML | 21 Dec 2023 | |
| More literature | PCB layout guidelines to optimize power supply performance | 23 Mar 2021 | ||
| Technical article | Gain ultra-high power density for 100-W USB Power Delivery adapters | PDF | HTML | 05 Mar 2019 | |
| Technical article | How topology selection can help improve reliability in industrial AC/DC power supp | PDF | HTML | 14 Feb 2019 | |
| Technical article | Intelligently control an active clamp flyback | PDF | HTML | 01 Mar 2018 | |
| Application note | UCC24610 and UCC24612 SR Range Extension Guide | 18 Dec 2017 |
For additional terms or required resources, click any title below to view the detail page where available.
The UCC28780EVM-002 demonstrates high-efficiency and high-density for a 45-W off-line adapter using the UCC28780 active-clamp flyback controller at high frequency nominal 300 kHz using GaN MOSFET Power ICs, NV6115 and NV6117. The EVM also uses the UCC24612 synchronous rectifier controller on (...)
The UCC28780EVM-021 is a 45-W evaluation module (EVM) for evaluating an off-line active-clamp flyback adapter for notebook charging and other applications. The EVM meets CoC Tier 2 and DoE Level 6 efficiency requirements. It is intended for evaluation purposes and is not intended to be an end (...)
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |
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