UCC24630 Series

Synchronous rectifier controller With Ultra Low Standby current

Catalog

Synchronous rectifier controller With Ultra Low Standby current

Part	Voltage - Input [Min]	Voltage - Input [Max]	Current - Output	Voltage - Output	Supplied Contents	Utilized IC / Part	Board Type	Outputs and Type	Outputs and Type	Main Purpose	Regulator Topology	Voltage - Supply [Min]	Voltage - Supply [Max]	Supplier Device Package	Mounting Type	Package / Case	Current - Supply	Applications	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments UCC24630EVM-636	90 VAC	265 VAC	3.33 A	19.5 V	Board(s)	UCC24630	Fully Populated	Isolated	1	AC/DC Primary and Secondary Side	Flyback
Texas Instruments UCC24630DBVR												3.6 V	28 V	SOT-23-6	Surface Mount	SOT-23-6	900 µA	Secondary-Side Controller	125 °C	-40 °C
Texas Instruments UCC24630DBVT												3.6 V	28 V	SOT-23-6	Surface Mount	SOT-23-6	900 µA	Secondary-Side Controller	125 °C	-40 °C

Catalog

Synchronous rectifier controller With Ultra Low Standby current

Key Features

• Secondary-Side SR Controller Optimized for 5-V to 24-V Flyback SystemsOperating Frequency Up to 200 kHzVolt-Second Balance SR On-Time ControlMinimize Effect of MOSFET Device and Layout InductanceCCM Operation CompatibilityCompatible with PSR and SSR ControlAuto Low-Power Detect and 110-µA Standby Mode CurrentWide VDD Range from 3.6 V to 28 VRail-to-Rail Gate Driver with 13-V ClampOpen and Short Pin Fault ProtectionSecondary-Side SR Controller Optimized for 5-V to 24-V Flyback SystemsOperating Frequency Up to 200 kHzVolt-Second Balance SR On-Time ControlMinimize Effect of MOSFET Device and Layout InductanceCCM Operation CompatibilityCompatible with PSR and SSR ControlAuto Low-Power Detect and 110-µA Standby Mode CurrentWide VDD Range from 3.6 V to 28 VRail-to-Rail Gate Driver with 13-V ClampOpen and Short Pin Fault Protection

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. 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.