NCP4303A, NCP4303B Secondary Side Synchronous Rectification Driver for High Efficiency SMPS Topologies www.onsemi.com The NCP4303A/B is a full featured controller and driver tailored to control synchronous rectification circuitry in switch mode power MARKING supplies. Thanks to its versatility, it can be used in various topologies DIAGRAM such as flyback, forward and Half Bridge Resonant LLC. The combination of externally adjustable minimum on and off times 8 helps to fight the ringing induced by the PCB layout and other SOIC8 4303x 8 D SUFFIX parasitic elements. Therefore, a reliable and noise less operation of the ALYW 1 CASE 751 SR system is insured. 1 The extremely low turn off delay time, high sink current capability of the driver and automatic package parasitic inductance compensation system allow to maximize synchronous rectification NCP DFN8 MOSFET conduction time that enables further increase of SMPS 4303x CASE 488AF efficiency. ALYW 1 Finally, a wide operating V range combined with two versions of CC driver voltage clamp eases implementation of the SR system in 24 V 4303x = Specific Device Code output applications. x = A or B A = Assembly Location Features L = Wafer Lot Self-Contained Control of Synchronous Rectifier in CCM, DCM, and Y = Year QR Flyback Applications W = Work Week = PbFree Package Precise True Secondary Zero Current Detection with Adjustable (Note: Microdot may be in either location) Threshold Automatic Parasitic Inductance Compensation Input PINOUT INFORMATION Typically 40 ns Turn off Delay from Current Sense Input to Driver V DRV 1 8 CC Zero Current Detection Pin Capability up to 200 V 2 7 Min Toff GND Optional Ultrafast Trigger Interface for Further Improved Min Ton 3 6 COMP Performance in Applications that Work in Deep CCM 4 5 Trig/Disable CS Disable Input to Enter Standby or Low Consumption Mode (NOTE: For DFN the exposed pad must be either Adjustable Minimum On Time Independent of V Level unconnected or preferably connected to ground. CC The GND pin must be always connected to ground.) Adjustable Minimum Off Time Independent of V Level CC 5 A/2.5 A Peak Current Sink/Source Drive Capability ORDERING INFORMATION Operating Voltage Range up to 30 V Gate Drive Clamp of Either 12 V (NCP4303A) or 6 V (NCP4303B) Device Package Shipping Low Startup and Standby Current Consumption NCP4303ADR2G SOIC8 2500 / (PbFree) Tape & Reel Maximum Frequency of Operation up to 500 kHz NCP4303BDR2G SOIC8 2500 / SOIC8 Package (PbFree) Tape & Reel These are Pb-Free Devices NCP4303AMNTWG DFN8 4000 / (PbFree) Tape & Reel Typical Applications NCP4303BMNTWG DFN8 4000 / Notebook Adapters (PbFree) Tape & Reel High Power Density AC/DC Power Supplies For information on tape and reel specifications, Gaming Consoles including part orientation and tape sizes, please All SMPS with High Efficiency Requirements refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: April, 2015 Rev. 5 NCP4303/DNCP4303A, NCP4303B Figure 1. Typical Application Example LLC Converter Figure 2. Typical Application Example DCM, QR or CCM Flyback Converter www.onsemi.com 2