Overview
The UCC24612-1DBVR is a high-performance synchronous rectifier controller and driver designed by Texas Instruments. It is optimized for use with standard and logic-level N-channel MOSFET power devices. This controller implements a near-ideal diode emulation, which significantly reduces the losses of the output rectifier and indirectly the primary side losses. The UCC24612-1DBVR supports various topologies such as Active Clamp Flyback, QR/DCM/CCM Flyback, and LLC, making it versatile for a range of applications and frequencies.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Frequency | Up to 1 MHz (UCC24612-1), 800 kHz (UCC24612-2) | Hz |
| VDD Range | 5 V to 28 V | V |
| MOSFET VDS Sensing | Up to 230 V | V |
| Gate Driver Current | 4 A sink, 1 A source | A |
| Minimum On-Time | 245-475 ns (UCC24612-1), 350-670 ns (UCC24612-2) | ns |
| Turn-on Propagation Delay | 40-120 ns (UCC24612-1), 120-225 ns (UCC24612-2) | ns |
| Turn-off Propagation Delay | 16-35 ns | ns |
| Standby Mode Current | 320 µA | µA |
| Package Type | SOT23-5 | - |
| Thermal Shut-down Threshold | 130-165 ºC | ºC |
Key Features
- Supports multiple topologies including Active Clamp Flyback, QR/DCM/CCM Flyback, and LLC.
- MOSFET VDS sensing up to 230 V.
- Wide VDD range allows direct bias from 5-V to 28-V output systems.
- 4-A sink, 1-A source gate driver with proportional gate drive.
- Adaptive minimum off-time for increased noise immunity.
- High or low-side configurable).
- Automatic light-load and sleep-mode management with 320-µA standby current).
- Fast comparator with short propagation delays reduces switching loss).
- 9.5-V gate drive clamp reduces MOSFET driving losses).
- Frequency dependent standby modes further decrease standby power).
Applications
- AC-to-DC Adapters).
- USB Type-C and Power Delivery AC Adapters).
- Server and Telecom Power Supply).
- AC-to-DC Auxiliary Power Supply).
Q & A
- What is the primary function of the UCC24612-1DBVR?
The UCC24612-1DBVR is a high-performance synchronous rectifier controller and driver designed to reduce losses in the output rectifier and indirectly the primary side losses by implementing a near-ideal diode emulation).
- What are the supported topologies by the UCC24612-1DBVR?
The UCC24612-1DBVR supports topologies such as Active Clamp Flyback, QR/DCM/CCM Flyback, and LLC).
- What is the operating frequency range of the UCC24612-1DBVR?
The operating frequency range is up to 1 MHz for UCC24612-1 and 800 kHz for UCC24612-2).
- What is the VDD range for the UCC24612-1DBVR?
The VDD range is from 5 V to 28 V).
- What is the gate driver current capability of the UCC24612-1DBVR?
The gate driver can sink 4 A and source 1 A).
- How does the UCC24612-1DBVR manage standby mode?
The UCC24612-1DBVR features automatic light-load and sleep-mode management with a standby current of 320 µA).
- What are the thermal shutdown thresholds for the UCC24612-1DBVR?
The thermal shutdown threshold is between 130-165 ºC).
- What package type is the UCC24612-1DBVR available in?
The UCC24612-1DBVR is available in a SOT23-5 package).
- How does the UCC24612-1DBVR enhance efficiency?
The UCC24612-1DBVR enhances efficiency through features such as fast comparator with short propagation delays, 9.5-V gate drive clamp, and frequency dependent standby modes).
- What are some common applications of the UCC24612-1DBVR?
Common applications include AC-to-DC Adapters, USB Type-C and Power Delivery AC Adapters, Server and Telecom Power Supply, and AC-to-DC Auxiliary Power Supply).
