NCP4328 Secondary Side CV/CC Controller The NCP4328 is a secondary side SMPS controller designed for use in applications which requires constant current and/or constant current regulation. www.onsemi.com The NCP4328x consists of two OTA amplifiers for voltage and current loop regulation with precise internal voltage references. Outputs of OTAs are open drain type (OTAs sink current only). MARKING The NCP4328B includes a LED driver pin implemented with an DIAGRAMS open drain MOSFET driven by a 1 kHz square wave with a 12.5% duty cycle working when VCC is above UVLO for indication purpose. 5 The NCP4328A is available in TSOP5 package while the TSOP5 XXXAYW NCP4328B is available in TSOP6 package. 5 SN SUFFIX 1 CASE 483 Features 1 Operating Input Voltage Range: 2.5 V to 36.0 V Supply current < 100 A 0.5% Reference Voltage Accuracy (T = 25C) J TSOP6 Constant Voltage and Constant Current (A versions) Control Loop XXXAYW SN SUFFIX Indication LED PWM Modulated Driver (NCP4328B) CASE 318G 1 1 These Devices are PbFree, Halogen Free/BFR Free and are RoHS Compliant XXX = Specific Device Code A = Assembly Location Typical Applications Y = Year Offline Adapters for Notebooks, Game Stations and Printers W = Work Week LED Lightening = PbFree Package High Power ACDC Converters for TVs, SetTop Boxes, Monitors (Note: Microdot may be in either location) etc. ORDERING INFORMATION See detailed ordering, marking and shipping information on page 8 of this data sheet. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: July, 2015 Rev. 2 NCP4328/DNCP4328 ISNS OTA Sink only VCC V CC V REFC management Current GND Regulation VSNS FBC OTA Sink only V REF Voltage Regulation NCP4328A ISNS VCC OTA Sink only V CC Power V REFC Current management RESET Regulation GND V REF VSNS FBC OTA Sink only Power RESET Voltage V REF LED Regulation SW 1 kHz, 12% D.C. Oscillator NCP4328B Figure 1. Simplified Block Diagrams NCP4328A and NCP4328B www.onsemi.com 2