NCP4354ADR2G ON Semiconductor

NCP4353, NCP4354 Secondary Side SMPS OFF Mode Controller for Low Standby Power The NCP4353/4 is a secondary side SMPS controller designed for use in applications which require extremely low no load power www.onsemi.com consumption. The device is capable of detecting no load conditions and entering the power supply into a low consumption OFF mode. MARKING DIAGRAMS During OFF mode, the primary side controller is turned off and energy is provided by the output capacitors thus eliminating the power consumption required to maintain regulation. During OFF mode, the TSSOP6 XXXAYW output voltage relaxes and is allowed to decrease to an adjustable CASE 318G level. Once more energy is required, the NCP4353/4 automatically 1 1 restarts the primary side controller. The NCP4353/4 controls the primary side controller with an Active OFF signal, meaning that it 8 drives optocoupler current during OFF mode to pulldown the FB pin SOIC8 XXXXX of the primary controller. 8 CASE 751 ALYW During normal power supply operation, the NCP4353/4 provides 1 integrated voltage feedback regulation, replacing the need for a shunt 1 regulator. The A versions include a current regulation loop in addition A = Assembly Location to voltage regulation. Feedback control as well as ON/OFF signal can L = Wafer Lot be provided with only one optocoupler. Y = Year The NCP4354 includes a LED driver pin implemented with an open W = Work Week drain MOSFET driven by a 1 kHz square wave with a 12.5% duty = PbFree Package cycle when primary side is in regulation for indication purpose. (Note: Microdot may be in either location) The NCP4353 is available in TSOP6 package while the NCP4354 is available in SOIC8 package. ORDERING INFORMATION Features See detailed ordering, marking and shipping information in the package dimensions section on page 15 of this data sheet. Operating Input Voltage Range: 2.5 V to 36.0 V Supply Current < 100 A 0.5% Reference Voltage Accuracy (T = 25C) J Constant Voltage and Constant Current (A versions) Control Loop Indication LED PWM Modulated Driver (NCP4354x) Designed for use with NCP1246 Fixed Frequency PWM Controller These Devices are PbFree, Halogen Free/BFR Free and are RoHS Compliant Typical Applications Offline Adapters for Notebooks, Game Stations and Printers High Power ACDC Converters for TVs, SetTop Boxes, Monitors, etc. DEVICE OPTIONS NCP4353A NCP4353B NCP4354A NCP4354B Adjustable No Yes Yes Yes V min Current Yes No Yes No Regulation LED Driver No No Yes Yes Package TSOP6 TSOP6 SOIC8 SOIC8 Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: April, 2015 Rev. 4 NCP4353/DNCP4353, NCP4354 Current Regulation ISNS VCC OTA Sink only V CC VREFC management I BIASV Power RESET SW3 V DD V DD V REF VSNS DRIVE OTA Sink only Voltage V REF Power Regulation RESET 0.9xVREF I DRIVEOFF I BIASV Enabling VCC SW1 Off Mode Q S 10%V CC Detection Q R OFFDET GND Power RESET NCP4353A VCC V CC management IBIASV Power RESET SW3 V DD V DD V REF VSNS DRIVE OTA Sink only Voltage V REF Regulation Power RESET 0.9 x VREF I DRIVEOFF I BIASV Enabling VCC SW1 Off Mode Q S Detection 10%V CC Q R OFFDET VMIN GND Power RESET V Min Output REFM Voltage NCP4353B Figure 1. Simplified Block Diagrams NCP4353A and NCP4353B www.onsemi.com 2