Fixed Frequency Current Mode Controller for Flyback Converters NCP12400 The NCP12400 is a new fixed frequency currentmode controller www.onsemi.com featuring the Dynamic SelfSupply. This function greatly simplifies the design of the auxiliary supply and the V capacitor by activating CC the internal startup current source to supply the controller during startup, transients, latch, standby etc. This device contains a special HV detector which detects the application unplug from the ac input line and triggers the X2 discharge current. This HV structure allows SOIC7 the brownout detection as well. CASE 751U It features a timerbased fault detection that ensures the detection of overload and an adjustable compensation to help keep the maximum MARKING DIAGRAM power independent of the input voltage. Due to frequency foldback, the controller exhibits excellent 8 efficiency in light load condition while still achieving very low XXXXX standby power consumption. Internal frequency jittering, ramp ALYW compensation, and a versatile latch input make this controller an 1 excellent candidate for the robust power supply designs. A dedicated Off Mode allows to reach the extremely low no load 400VWXYZf = Specific Device Code input power consumption via sleeping whole device and thus (see page 2) A = Assembly Location minimize the power consumption of the control circuitry. L = Wafer Lot Y = Year Features W = Work Week FixedFrequency CurrentMode Operation 65 kHz or 100 kHz = PbFree Package Frequency Options (Note: Microdot may be in either location) Frequency Foldback then Skip Mode for Maximized Performance in Light Load and Standby Conditions TimerBased Overload Protection with Latched (Option A) or PIN CONNECTIONS 1 8 Autorecovery (Option B) Operation FAULT HV HighVoltage Current Source with BrownOut Detection and FB Dynamic SelfSupply, Simplifying the Design of the V Circuitry CC CS V CC Frequency Modulation for Softened EMI Signature GND DRV Adjustable Overpower Protection Dependant on the Mains Voltage 4 5 Fault Input for Overvoltage and Over Temperature Protection (Top View) V Operation up to 28 V, with Overvoltage Detection CC 300/500 mA Source/Sink Drive Peak Current Capability ORDERING INFORMATION 4/10 ms SoftStart See detailed ordering and shipping information on page 44 of this data sheet. Internal Thermal Shutdown NoLoad Standby Power < 30 mW X2 Capacitor in EMI Filter Discharging Feature These are PbFree Devices Typical Applications Offline Adapters for Notebooks, LCD, and Printers Offline Battery Chargers Consumer Electronic Power Supplies Auxiliary/Housekeeping Power Supplies Offline Adapters for Notebooks Semiconductor Components Industries, LLC, 2017 1 Publication Order Number: May, 2021 Rev. 7 NCP12400/DNCP12400 TYPICAL APPLICATION SCHEMATIC Figure 1. Flyback Converter Application using the NCP12400 Table 1. OPTIONS Frozen Brown Out Current Soft Part OPN Start Stop OCP Fault Setpoint Quiet skip Start Frequency OTP/OVP NCP12400BAHAB0DR2G 103 100 V Latched 300 mV No, min. 3 pulses 4 ms 65 kHz Latched only NCP12400BAHBB0DR2G 111 103 V Latched 300 mV Yes, min. 3 pulses, 4 ms 65 kHz Latched 800 Hz burst NCP12400BBBBB2DR2G 111 103 V Autorecovery 150 mV Yes, min. 3 pulses, 4 ms 65 100 Latched 800 Hz burst kHz NCP12400BBHAA1DR2G 111 103 V Autorecovery 300 mV No, min. 3 pulses 10 ms 100 kHz Autorecovery only NCP12400CAHAB0DR2G 95 93 V Latched 300 mV No, min. 3 pulses 4 ms 65 kHz Latched only NCP12400CBAAB0DR2G 95 93 V Autorecovery No No, min. 3 pulses 4 ms 65 kHz Latched only NCP12400CBBAB0DR2G 95 93 V Autorecovery 150 mV No, min. 3 pulses 4 ms 65 kHz Latched NCP12400 only NCP12400CBHAA0DR2G 95 93 V Autorecovery 300 mV No, min. 3 pulses 10 ms 65 kHz Autorecovery only NCP12400EAHBB0DR2G Brown In, No Latched 300 mV Yes, min. 3 pulses, 4 ms 65 kHz Latched BO 800 Hz burst NCP12400BBBBA0DR2G 111 103 V Autorecovery 150 mV Yes, min. 3 pulses, 10 ms 65 kHz Latched 800 Hz burst NCP12400BBHAB0DR2 111 103 V Autorecovery 300 mV No, min. 3 pulses 4 ms 65 kHz Latched only NCP12400BBEBA0DR2G 111 103 V Autorecovery 210 mV Yes, min. 3 pulses, 10 ms 65 kHz Latched 800 Hz burst NCP12400BBAAA0DR2G 111 103 V Autorecovery No No 10 ms 65 kHz Latched www.onsemi.com 2