UCC24612

ACTIVE

High-frequency multi-mode synchronous rectifier controller

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Product details

Parameters

Frequency (Max) (kHz) 1000 UVLO thresholds on/off (V) 4.5/4 Features Proportional gate drive Operating temperature range (C) -40 to 125 open-in-new Find other Synchronous rectifier (SR) controllers

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Synchronous rectifier (SR) controllers

Features

  • Supports Topologies such as Active Clamp Flyback, QR, DCM, CCM Flyback and LLC
  • MOSFET VDS Sensing up to 230 V
  • Operating Frequency Up to 1 MHz
    • 1 MHz for UCC24612-1
    • 800 kHz for UCC24612-2
  • Wide VDD Range Allows for 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
  • Cycle Limit Pre-Turn-off Improves Efficiency in CCM
  • High or Low-Side Configurable
  • Automatic Light-Load and Sleep-Mode Management with 320-µA standby current
  • 16-ns Typical Turnoff Propagation Delay
  • 9.5-V Gate Drive Clamp for Reduced Driving Loss

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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.

UCC24612 is available in a SOT23-5 package.

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Technical documentation

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No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet UCC24612 High Frequency Synchronous Rectifier Controller datasheet (Rev. A) Feb. 13, 2018
Technical articles Gain ultra-high power density for 100-W USB Power Delivery adapters Mar. 05, 2019
Technical articles How topology selection can help improve reliability in industrial AC/DC power supplies Feb. 14, 2019
Technical articles Intelligently control an active clamp flyback Mar. 01, 2018
Technical articles TI empowers design engineers at APEC Feb. 16, 2018
Application notes UCC24610 and UCC24612 SR Range Extension Guide Dec. 18, 2017
User guides Using the UCC24612-1EVM May 16, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$199.00
Description

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 (...)

Features
  • 45-W, 20-V AC-to-DC converter using active-clamp flyback controller, GaN MOSFET Power IC, and synchronous rectification
  • High Efficiency (> 94%), High Power Density (> 20W/in3), Low Standby Power (55mW), and High Switching Frequency (300kHz)
  • Exceeds EU Code of Conduct and US Department of Energy (...)
EVALUATION BOARDS Download
document-generic User guide
$149.00
Description

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 (...)

Features
  • 45-W, 20-V AC-to-DC converter using active-clamp flyback controller, Si MOSFET Power IC, and synchronous rectification.
  • High Efficiency (> 93%), High Power Density (> 20W/in3), Low Standby Power (55mW), and High Switching Frequency (300kHz).
  • Exceeds EU Code of Conduct and US Department of Energy (...)
DAUGHTER CARDS Download
document-generic User guide
$99.00
Description
The UCC24612-1EVM evaluation module (EVM) is used to convert the output rectifier of a flyback converter from a diode to a synchronous rectifier (SR) FET to investigate and evaluate the efficiency benefits of using an SR over a rectifier diode.
Features
  • Small SR controller daughter card to easily evaluate performance as diode replacement           
  • Supports CCM/DCM/QR Flyback, LLC, Active Clamp Flyback Topologies           
  • Supports High Side or Low Side SR           
  • Supports 4V to 28V output applications directly           
  • Includes SR MOSFET in industry standard package 

Design tools & simulation

SIMULATION MODELS Download
SLUM597A.ZIP (491 KB) - SIMPLIS Model

Reference designs

REFERENCE DESIGNS Download
94.5% Efficiency, 500W industrial AC-DC reference design
TIDA-010015 — This reference design is a compact, high efficiency, 24-V DC, 500-W reference design for industrial AC/DC power supplies. This design consists of a front-end, two-phase interleaved transition mode (TM) power factor correction (PFC) based on the UCC28064A. This minimizes the PFC inductor size and (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
65W Active clamp flyback with Si FETs reference design for a high power density 5-20V AC/DC adapter
PMP21479 — This reference design uses the UCC28780 active clamp flyback controller to generate a 20-V/15-V/9-V/5-V adjustable output voltage. The maximum power rating is 65 W at 20-V output and up to 3 A at all other output voltage settings. This design reaches a peak efficiency of over 93% using silicon FETs (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
93% Efficiency, 400-W AC/DC reference design for avionics
PMP30763 — This is a compact, 30-V DC, 400-W reference design for avionics applications, accepting main frequencies between 400 Hz and 800 Hz. This design consists of a front-end, two-phase interleaved transition mode (TM) power factor correction (PFC) based on UCC28064A. This minimizes the PFC inductor size (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
22-W/in3, 93.1% peak efficiency, 100-W USB-PD 3.0 AC/DC adapter reference design with Si MOSFET
TIDA-010047 — This fully-tested reference design is a high-efficiency, high-power-density, AC/DC adapter solution with a wide input voltage range (100- to 240-V AC) for laptop adapters and smartphone charger applications. This design consists of a front-end transition-mode (TM) power factor correction (PFC (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
336-W Auxless AC/DC power supply reference design with 80 PLUS platinum compatible performance
PMP22087 — This reference design is an AC/DC power supply design with critical conduction mode (CRM) PFC and half-bridge LLC series resonant converter that provides 24 V, 240-W continuous, 336-W peak output from a universal input AC voltage (90 VAC to 264 VAC). This design uses UCC28056 CRM/DCM PFC controller (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
100-VAC to 130-VAC input, 5-Vout, 6-A CCM flyback reference design
PMP22006 — This isolated continuous conduction mode (CCM) flyback reference design outputs 5 V at 6 A. The input is US line only (100 VAC-130 VAC).
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
36~57-Vdc input, 5-V/4-A output isolated flyback with synchronous rectification reference design
PMP40569 — This reference design is a 36~57-Vdc input, 5-V/4-A output isolated flyback converter using LM5155 and UCC24612. The switching frequency is 250 kHz. With the synchronous rectification controller UCC24612 and a MOSFET at the secondary side, the system achieves 89.29% peak efficiency at 36-V input (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High efficiency, ultra-wide input (20 VDC to 375 VDC) isolated power supply reference design
PMP30720 — This reference design uses the UCC28C42 boost controller and the UCC28780 active-clamp flyback controller to generate an isolated output of 24 V at 3.5 A over an ultra-wide input voltage range of 20 V to 375 V. The design also uses the UCC24612 synchronous rectifier controller on the secondary side (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High efficiency, 70-W AC/DC active clamp flyback reference design
PMP30631 — This reference design uses the UCC28780 active clamp flyback controller to generate an isolated output of 20 V @ 3.5 A over an input voltage rage of 90 Vac to 264 Vac. The design also uses the UCC24612 synchronous rectifier controller on the secondary side. Zero voltage switching (ZVS) ensures high (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
60-W, Ultra-wide range power supply reference design
PMP21783 — This reference design provides a 12-Vdc, 5-Vdc, and 3.3-Vdc output from an ultra-wide range of both AC and DC inputs. A universal 85 to 265-Vac input can be applied to the input of the quasi-resonant flyback. For DC inputs ranging from 24 to 150-Vdc, a boost creates a 150-V bus voltage that is fed (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
30-W/in3, 94% Efficiency, 65-W USB Type-C PD AC/DC adapter reference design
TIDA-01622 — This fully tested, USB power delivery reference design is a high efficiency, high power density, AC/DC adapter solution with a wide input voltage range (85 - 265VAC) for laptop adapters and smartphone charger applications. It adopts active-clamp-flyback topology controlled by TI’s newest ACF (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
30-W/in3, 93.4% efficiency, 100-W AC/DC adapter reference design
TIDA-01623 — This fully-tested reference design is a high-efficiency, high-power-density, AC/DC adapter solution with a wide input voltage range (100- to 240-V AC) for laptop adapters and smartphone charger applications. This design consists of a front-end transition-mode (TM) power factor correction (PFC (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High Efficiency, High Power Density Active Clamp Flyback Adapter with SJ FET Reference Design
PMP40328 — PMP40328 is a maximum 9V 5A reference design for high frequency and high density adapter applications. The solution implements a high efficiency active clamp flyback  controller UCC28780 and secondary rectifier controller UCC24612-2. The efficiency is around 90% at full load. Integrated input (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
480W, <17 mm, Thin Profile, 94% Efficiency, Fast Transient Response AC/DC SMPS Reference Design
TIDA-01495 — The TIDA-01495 is a low profile (17 mm height), 94.1% peak efficiency, high power density, universal input, 24-V DC, 480-W output, consumer AC/DC power supply reference design. The circuit consists of a front-end two phase interleaved transition mode (TM) power factor correction (PFC) based on the (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
110 VAC to 38 V at 2 A single stage LLC resonant converter reference design
PMP30522 — This reference design is a half bridge LLC resonant converter, typically combined to PFC front end. It works directly from mains (100 VAC - 127 VAC) and supplies 38 V at 2 A. The burst mode feature keeps the curve flat in a range of 86% - 94% when load is varied between 1% and 100%.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Single stage AC-DC auxless LLC resonant converter reference design
PMP21000 — This reference design provides a 12-V/100-W output from either 120-Vac or 230-Vac input with a single LLC resonant converter stage. The bill of materials (BOM) cost of this design is highly optimized with the single-stage structure and the use of UCC256302 LLC resonant controller. High voltage (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
336-W auxless AC/DC power supply reference design with 80 PLUS platinum compatible performance
PMP21160 — This reference design uses UCC28056 CRM/DCM PFC controller and UCC256304 enhanced LLC controller with integrated driver to provide 24-V/10-A output (continuous, 14-A peak) from universal AC input. This design achieves 92.8% peak efficiency at 115-Vac input and 94.9% peak efficiency at 230-Vac input (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
24-V, 480-W Nominal 720-W peak, >93.5% efficient, robust AC/DC industrial power supply reference
TIDA-01494 — The TIDA-01494 reference design is a compact, high efficiency, 24-V DC, 480-W nominal, 720-W peak output reference design for industrial AC/DC power supplies. The circuit consists of a front-end continuous conduction mode (CCM) power factor correction (PFC) circuit followed by a robust LLC stage (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Less than 90mW Ultra-low Standby Power Auxless AC-DC Power Supply Reference Design
PMP21251 — The PMP21251 reference design uses UCC28056 CRM/DCM PFC controller and UCC256304 enhanced LLC controller with integrated driver to provide 12V/10.8A output (continuous, 14.4A peak) from universal AC input. This design achieves 92.4% peak efficiency at 115VAC input and 94.0% peak efficiency at 230VAC (...)
document-generic Schematic document-generic User guide

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Package Pins Download
SOT-23 (DBV) 5 View options

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