PWM Controller, Input Current Mode, Ultra Wide NCP12700 The NCP12700 is a fixed frequency, peak current mode, PWM controller containing all of the features necessary for implementing singleended power converter topologies. The device features a high www.onsemi.com voltage startup capable of operating over a wide input range and supplying at least 15 mA to provide temporary bias to V during CC system startup. The device contains a programmable oscillator capable of operating from 100 kHz to 1 MHz and integrates slope compensation to prevent subharmonic oscillations. The controller 1 offers an adjustable softstart, input voltage UVLO protection, and an WQFN10 MSOP adjustable OverPower Protection circuit which limits the total power MT SUFFIX DN SUFFIX capability of the circuit as the input voltage increases, easing the CASE 511DV CASE 846AE system thermal design. The UVLO pin also features a shutdown comparator which allows for an external signal to disable switching MARKING DIAGRAMS and bring the controller into a low quiescent state. The NCP12700 contains a suite of protection features including cycle by cycle peak current limiting, timer based overload 12700x protection, and a FLT pin which can be interfaced with an NTC and an ALYW auxiliary winding to provide system thermal protection and output overvoltage protection. All protection features place the device into a 10 low quiescent fault mode and recovery from fault mode is dependent on the device option. 700x ALYW Common General Features Wide Input Range (9 120/200 V MSOP10/WQFN10) 1 Startup Regulator Circuit with 15 mA Capability 12700 or 700 = Specific Device Code Current Mode Control with Integrated Slope Compensation x = A, B or C A = Assembly Site Suitable for Flyback or Forward Converters L = Wafer Lot Number Single Resistor Programmable Oscillator YW = Assembly Start Week = PbFree Package 1 A / 2.8 A Source / Sink Gate Driver (Note: Microdot may be in either location) User Adjustable SoftStart Ramp Input Voltage UVLO with Hysteresis Shutdown Threshold for External Disable ORDERING INFORMATION See detailed ordering and shipping information in the package Skip Cycle Mode for Low Standby Power dimensions section on page 4 of this data sheet. This is a PbFree Device Fault Protection Features Typical Applications User Adjustable OverPower Protection Singleended Power Converters including CCM/DCM Flyback and Forward Converters Overload Protection with 30 ms Overload Timer Telecommunications Power Converters NTCCompatible Fault Interface for Thermal Industrial Power Converter Modules Protection Output OVP Fault Interface Transportation & Railway Power Modules Fault Autorecovery Mode with 1 s Autorecovery Power over Ethernet Powered Devices (PoE PD) Period Semiconductor Components Industries, LLC, 2018 1 Publication Order Number: November, 2020 Rev. 3 NCP12700/DNCP12700 VOUT VIN UVLO VIN FLT VCC SS DRV RT GND COMP CS FEEDBACK WITH ISOLATION Figure 1. Typical Application Circuit for Vin = 12 160 V VIN VOUT UVLO VIN FLT VCC SS DRV RT GND COMP CS FEEDBACK WITH ISOLATION Figure 2. Typical Application Circuit for Vin = 9 18 V www.onsemi.com 2