Texas Instruments UCC24612-1 | Demoboard TIDA-010239

Description

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.The UCC28742 employs advanced control algorithms to achieve high operating efficiency and performance. The drive output interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley-switching reduces switching losses. Modulation of switching frequency and primary current-peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.The controller has a maximum switching frequency of 80 kHz and always maintains control of the peak-primary current in the transformer. A minimum switching frequency of 200 Hz facilitates the achievement of low no-load input power.This EVM includes an on-board MSP430, MSP430FR2355, which is used to interface with the MCT8316ZTEVM GUI.

Features

Supports Topologies such as Active Clamp Flyback, QR, DCM, CCM Flyback and LLCMOSFET VDS Sensing up to 230 VOperating Frequency Up to 1 MHz1 MHz for UCC24612-1800 kHz for UCC24612-2Wide VDD Range Allows for Direct Bias from 5-V to 28-V Output Systems4-A Sink, 1-A Source Gate Driver with Proportional Gate DriveAdaptive Minimum Off-time for Increased Noise ImmunityCycle Limit Pre-Turn-off Improves Efficiency in CCMHigh or Low-Side ConfigurableAutomatic Light-Load and Sleep-Mode Management with 320-µA standby current16-ns Typical Turnoff Propagation Delay9.5-V Gate Drive Clamp for Reduced Driving Loss

Typical applications

• AC-to-DC Adapters
• USB Type-C and Power Delivery AC Adapters
• AC-to-DC Auxiliary Power Supply
• Server and Telecom Power Supply

More information

• Datasheet
• IC product information