Overview
The UCC24624DR, produced by Texas Instruments, is a high-performance synchronous rectifier (SR) controller specifically designed for LLC resonant converters. This component is engineered to replace lossy diode output rectifiers with SR MOSFETs, thereby enhancing overall system efficiency. It is particularly suited for applications requiring high efficiency and power density, such as power supplies for PCs, servers, and televisions. The UCC24624DR stands out for its advanced features like proportional gate drive, adjustable forward turn-off threshold, and dual-channel interlock, making it a competitive choice in the power electronics market.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Voltage Detection Pin | 230 | V | |
| Absolute Maximum VDD | 28 | V | |
| Turn-On Time Blanking | 475 | ns | |
| Turn-Off Time Blanking | 650 | ns | |
| Package | SOIC-8 |
Key Features
- Proportional gate drive to extend SR conduction time and minimize body diode conduction time.
- Adjustable forward turn-off threshold to compensate for SR MOSFET parasitic inductance.
- Built-in 475ns turn-on time blanking and fixed 650ns turn-off time blanking to prevent false SR turn-on and turn-off.
- Dual-channel interlock to prevent simultaneous conduction of two SRs.
Applications
The UCC24624DR is widely used in various power supply applications, including desktop and server power supplies, AC/DC adapters, and television power units. Its ability to enhance efficiency and reduce thermal stress makes it ideal for high-power density designs in industrial and consumer electronics. Additionally, its robust design supports high voltage operations, making it suitable for advanced power management systems in automotive and renewable energy sectors.
Q & A
What is the primary function of the UCC24624DR?
The UCC24624DR is designed to control synchronous rectifiers in LLC resonant converters, replacing traditional diode rectifiers to improve efficiency.
What are the key features of the UCC24624DR?
Key features include proportional gate drive, adjustable turn-off threshold, and dual-channel interlock functionality.
What is the maximum voltage the UCC24624DR can handle?
The UCC24624DR can handle a maximum voltage of 230V on its detection pin and up to 28V on its VDD pin.
What type of package does the UCC24624DR come in?
It is available in an SOIC-8 package.
How does the UCC24624DR improve system efficiency?
By replacing lossy diode rectifiers with SR MOSFETs and optimizing the conduction and turn-off times of these MOSFETs.
Can the UCC24624DR be used in automotive applications?
Yes, its robust design and high voltage handling capabilities make it suitable for automotive power management systems.
What is the significance of the dual-channel interlock feature?
It prevents simultaneous conduction of two SRs, thereby enhancing system safety and reliability.
What is the typical application of the UCC24624DR?
It is typically used in power supplies for PCs, servers, and televisions.
How does the adjustable turn-off threshold benefit the UCC24624DR?
It allows the device to compensate for parasitic inductance in different SR MOSFET packages, improving performance.
What is the operating voltage range of the UCC24624DR?
The operating voltage ranges from 4.25V to 26V, with internal clamping to support higher voltages.
