UCC24630

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Synchronous rectifier controller With Ultra Low Standby current

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Product details

Parameters

Frequency (Max) (kHz) 200 UVLO thresholds on/off (V) 4/3.6 Features Compatible with CCM Operating temperature range (C) -40 to 125 open-in-new Find other Synchronous rectifier (SR) controllers

Package | Pins | Size

SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 open-in-new Find other Synchronous rectifier (SR) controllers

Features

  • Secondary-Side SR Controller Optimized for 5-V to 24-V Flyback Systems
  • Operating Frequency Up to 200 kHz
  • Volt-Second Balance SR On-Time Control
  • Minimize Effect of MOSFET Device and Layout Inductance
  • CCM Operation Compatibility
  • Compatible with PSR and SSR Control
  • Auto Low-Power Detect and 110-µA Standby Mode Current
  • Wide VDD Range from 3.6 V to 28 V
  • Rail-to-Rail Gate Driver with 13-V Clamp
  • Open and Short Pin Fault Protection
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Description

The UCC24630 SR controller is a high-performance controller and driver for N-channel MOSFET power devices used for secondary-side synchronous rectification.

The combination of controller and MOSFET emulates a near-ideal diode rectifier. This solution not only directly reduces power dissipation of the rectifier but also reduces primary-side losses as well, due to compounding of efficiency gains.

Utilizing a volt-second balancing control method, the UCC24630 is ideal for flyback power supplies over a wide-output voltage range since the device is not connected directly to the MOSFET drain. The SR drive turn-off threshold is not dependent on the MOSFET RDS(on) which allows optimizing for maximum conduction time. Also secondary current ringing due to device and layout inductance does not affect the SR turn-off threshold.

The UCC24630 controller offers a programmable false-trigger filter, a frequency detector to automatically switch to standby mode during low power conditions and pin fault protections. The UCC24630 is compatible with DCM, TM and CCM operation.

The wide VDD operating range, wide programming range of the VPC voltage and blanking time, allows use in a variety of flyback converter designs.

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Technical documentation

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Type Title Date
* Datasheet UCC24630 Synchronous Rectifier Controller With Ultra-Low-Standby Current datasheet (Rev. A) Mar. 30, 2015
Application notes UCC24630 and UCC24636 SR-Control Configurations Guide Dec. 18, 2017
User guides Using the UCC24630EVM-636 65-W AC-to-DC Adapter (Rev. B) Dec. 12, 2016
Technical articles Achieving low standby power and high efficiency in flyback converters Jul. 27, 2015

Design & development

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

Hardware development

EVALUATION BOARDS Download
UCC24630 65W AC/DC Adapter
UCC24630EVM-636
document-generic User guide
$99.00
Description

This is a high efficiency 65W AC/DC design using UCC24630 Synchronous Rectification Controller for a Universal input (85Vac to 265Vac) to 19.5V @3.33A output exceeding CoC-5 Tier2 and DOE Level VI performance requirements for external power supplies.

Features
  • 91.49% @115V AC, 89.81% @230V AC 4-point average efficiency 
  • 83.14% @120V AC, 82.24% @230V AC 10% load efficiency
  • 59mW No load Power consumption at 230V AC
  • Fast turn-on time
  • <80mV output voltage ripple
  • AC line input UVLO protection

Design tools & simulation

CALCULATION TOOLS Download
SLUC582A.ZIP (69 KB)

Reference designs

REFERENCE DESIGNS Download
100W, 24V High Efficiency High PF Industrial Power Supply with Precision Current & Power Limit
TIDA-00701 TIDA-00701 is a 100W, 24V, Industrial AC-DC power supply designed for use in Industrial & Instrumentation systems such as process controls, factory automation and machinery control. This reference design has front end Power Factor Correction (PFC) circuit designed using UCC28051 PFC controller (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
65W High-efficiency CoC-5 tier2/DOE Level VI AC Adapter
TIDA-00519 This is a high efficiency 65W AC/DC design for a Universal input (85Vac to 265Vac) to 19.5V @3.33A output exceeding CoC-5 Tier2 and DOE Level VI requirements for external power supplies using the LM5023 Quasi-Resontant Flyback Controller with UCC24630 Synchronous Rectification Controller and (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Universal Line to 13 Volts at 4.6 Amps Power Supply Reference Design
PMP11329 — Universal line to 13 volt at 60 watts power supply. This is a synchronous fly back operating in continuous conduction mode using TI's synchronous rectifier controller on the secondary.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
38W Offline AC/DC Transition Mode Synchronous Flyback Converter Reference Design
PMP10145 The PMP10145 reference design uses the UCC28610 flyback controller for the transition mode flyback topology. It generates an isolated output (9V@4.22A) from a wide AC input voltage range (80VAC - 291VAC). The controller maintains discontinuous mode operation and valley switching over the entire (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
60W, 24V High Efficiency Industrial Power Supply with Precision Voltage, Current and Power Limit
TIDA-00702 The TIDA-00702 is a 60-W, industrial AC-DC power supply designed for use in industrial and instrumentation systems such as process controls, factory automation, and machinery control. This reference design is a Quasi-resonant (QR) flyback converter implemented using the UCC28740 CC-CV flyback (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Universal AC Input, 5V/10A/50W PSR Flyback Power Supply W/over 88% Avg Efficiency Reference Design
PMP11281 PMP11281 is a quasi-resonant Flyback power suppy based on the UCC28730 primary side regulation (PSR) controller. The elimination of optocoupler using PSR topology promises higher reliability and lower system cost. The design achieves less than 40mW standby power losses and over 88% average (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Universal AC Input 5V/6A/30W PSR Flyback Power Supply Reference Design w/Over 89.5% Avg Efficiency
PMP11232 — PMP11232 is a quasi-resonant Flyback power suppy based on the UCC28730 primary side regulation (PSR) controller. The elimination of optocoupler using PSR topology promises higher reliability and lower system cost. The design achieves less than 40mW standby power losses and over 89.5% average (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Universal AC Input 5V/10A/50W PSR Flyback Power Supply With Over 89% Avg Efficiency Reference Design
PMP10974 PMP10974 is a quasi-resonant Flyback power suppy based on the UCC28730 primary side regulation (PSR) controller. The elimination of optocoupler using PSR topology promises higher reliability and lower system cost. The design achieves less than 40mW standby power losses and over 89% average (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Universal AC Input, 10.5V/1.8A DC Output, Isolated Synchronous Flyback Converter Reference Design
PMP10164 The PMP10164 reference design supplies 10.5V@1.8A from universal AC mains; the isolated Flyback topology is the most used for low power range due to single magnetic component. Since the load is a power line communication chip, a fixed frequency modulation has been chosen. The controller LM5021 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Synchronous Rectifier Controller Daughter Board Reference Design
PMP11216 The UCC24630 SR controller is a high performance controller and driver for N-channel MOSFET power devices used in secondary side synchronous rectification. Using a volt-second balance control method, the UCC24630 is ideal for flyback power supplies over a wide output voltage range since the IC is (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 6 View options

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