SR & load share controllers
Improve your efficiency and power density with our high-performance synchronous rectifier and load-share controllers
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Synchronous rectification
Our synchronous rectification controllers enhance the efficiency of an AC/DC power supply by replacing the rectification diodes with actively controlled MOSFETs on the secondary side.
Load share
Get enhanced system reliability through redundancy; where it's possible to tolerate the failure of one or more modules as long as the remaining capacity is equal to or greater than the load demand.
Primary-side startup
Our primary-side startup devices support a fast transient response with one-sixth of the capacitance at the output.
Technical resources
Control & design challenges for SR controllers
Design Considerations With Dual-Channel SR Controller UCC24624
Achieving High Power Density and Ultra Low Standby Power in Flyback Converters
Discover featured applications
Increase efficiency while reducing standby power with our synchronous rectifier and wake-up controllers
Consumers are demanding smaller and faster chargers and adapters for portability and convenience. Adapters also need to deliver more power with the same or less size, without violating regulatory standards.
Benefits:
- Compatible with flyback and inductor-inductor-capacitor (LLC) topologies (including multimode) to boost efficiency by replacing lossy rectifier diodes.
- Light-load management and low standby current.
- A wide drain-voltage range for direct biasing reduces bill of materials.
- High-side or low-side configurable for flexibility with integrated drivers and clamps.
Featured resources
- UCC24650 – 200-V wake-up monitor for fast transient primary-side regulation
- PFCLLCSREVM034 – AC to isolated DC EVM with UCC28056B, UCC256404 and UCC24624
- UCC28730EVM-552 – UCC28730 Primary Side Flyback Controller with UCC24650 Secondary Side Wake Up
- UCC24610 and UCC24612 SR Range Extension Guide – Application note
- Rapid Transient Response With UCC28633 PSR-Flyback and UCC24650 Wake-Up Monitor – Application note
Efficiently and safely deliver power with a portable battery charger using our synchronous rectifier and wake-up controllers
Our synchronous rectifier and wake-up controllers reduce losses on key parts of the board while reducing standby power.
Benefits:
- Minimal losses and higher efficiency – as higher as 5% in some cases.
- Compatibility with common flyback and inductor-inductor-capacitor topologies, regardless of operating mode.
- Improved standby power and light-load efficiency in systems lacking a power-factor-correction front end.
Featured resources
- PMP15002 – Universal AC Input to 5V/3A Output Reference Design DOE6 and COC V5 Tier 2 Compliant
- UCC24612 – High-frequency multi-mode synchronous rectifier controller
- UCC24612-1EVM – Secondary-side synchronous rectifier controller diode-replacement demonstration board
- Using the UCC28730EVM-552 10-W Adaptor Module With PSR and Wake-Up Monitor – EVM User's guide
- UCC24610 and UCC24612 SR Range Extension Guide – Application note
Maximize efficiency in power-supply units (PSUs) in server and telecommunication equipment with our synchronous rectifier and wake-up controllers
A PSU needs to deliver more power without compromising performance. Our synchronous rectifier and load-share controllers facilitate high reliability and decreased thermal stress.
Benefits:
- Compliance with the Intel server system infrastructure specification enables enhanced system reliability by leveraging the capacity of multiple sources to deliver power to the load.
- A wide drain voltage range for direct biasing reduces bill of materials and increases design flexibility.
- Many packages and temperature ratings, as well as remote-sensing capability.
Featured resources
- UCC39002EVM – UCC39002 Evaluation Module
- UCC24610EVM-693 – Diode Replacement Demonstration Card for UCC24610 Secondary Side Synchronous Rectifier Controller
- UCC24610 and UCC24612 SR Range Extension Guide – Application note
Design & development resources
USB Type-C™ DFP 15V/3A/45W Out, Universal AC Input Reference Design
Reverse Power Supply - Eight Inputs One Output Reference Design
This reference design is a power solution for reverse-powered telecom applications. Up to eight isolated inputs provide one common output; the load is shared equally between all active converters.
Universal AC Input, 5V/10A/50W PSR Flyback Power Supply W/Rapid Load Transient Response Ref Design
PMP10407 is a quasi-resonant Flyback power suppy based on the UCC28730 primary side regulation (PSR) controller demonstrating the use of wake up device UCC24650 to achieve rapid load transient response from light load condition when the system is under low frequency operation. The elimination of (...)