NCP1230 PWM Controller, Fixed Frequency, Current Mode The NCP1230 represents a major leap towards achieving low standby power in mediumtohigh power SwitchedMode Power Supplies such as notebook adapters, offline battery chargers and consumer www.onsemi.com electronics equipment. Housed in a compact 8pin package (SOIC8, SOIC7, or PDIP7), the NCP1230 contains all needed control MARKING functionality to build a rugged and efficient power supply. The DIAGRAM NCP1230 is a current mode controller with internal ramp compensation. Among the unique features offered by the NCP1230 is 8 an event management scheme that can disable the frontend PFC SOIC8 VHVIC 230Dy circuit during standby, thus reducing the no load power consumption. D SUFFIX ALYWy 8 CASE 751 The NCP1230 itself goes into cycle skipping at light loads while 1 1 limiting peak current (to 25% of nominal peak) so that no acoustic noise is generated. The NCP1230 has a highvoltage startup circuit that eliminates external components and reduces power consumption. The NCP1230 also features an internal latching function that can be 8 SOIC7 8 used for OVP protection. This latch is triggered by pulling the CS pin 30D16 D1 SUFFIX ALYW above 3.0 V and can only be reset by pulling V to ground. True CC CASE 751U 1 overload protection, internal 2.5 ms softstart, internal leading edge 1 blanking, internal frequency dithering for low EMI are some of the other important features offered by the NCP1230. Features PDIP7 VHVIC 1230Pxxx P SUFFIX AWL CurrentMode Operation with Internal Ramp Compensation CASE 626B YYWWG 8 Internal HighVoltage Startup Current Source for LossLess Startup 1 1 Extremely Low NoLoad Standby Power SkipCycle Capability at Low Peak Currents xxx = Device Code: 65, 100, 133 y = Device Code: 6, 1, 1 Direct Connection to PFC Controller for Improved NoLoad Standby y = Device Code: 5, 0, 3 Power A = Assembly Location Internal 2.5 ms SoftStart L = Wafer Lot Y, YY = Year Internal Leading Edge Blanking W, WW = Work Week Latched Primary Overcurrent and Overvoltage Protection G = PbFree Package = PbFree Package ShortCircuit Protection Independent of Auxiliary Level (Note: Microdot may be in either location) Internal Frequency Jittering for Improved EMI Signature +500 mA/800 mA Peak Current Drive Capability Available in Three Frequency Options: 65 kHz, 100 kHz, and 133 kHz PIN CONNECTIONS Direct Optocoupler Connection 18 PFC Vcc HV SPICE Models Available for TRANsient and AC Analysis FB This is a PbFree Device CS V CC GND DRV Typical Applications High Power ACDC Adapters for Notebooks, etc. Offline Battery Chargers SetTop Boxes Power Supplies, TV, Monitors, etc. ORDERING INFORMATION See detailed ordering and shipping information in the ordering information section on page 4 of this data sheet. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: May, 2015 Rev. 12 NCP1230/DNCP1230 HV + V out PFC V CC 1 8 1 8 OVP OVP GN- 2 2 7 7 D + 3 3 6 6 CBulk 4 4 5 5 NCP1230 MC33262/33260 Ramp Comp Rsense V Cap CC 10 k GND Figure 1. Typical Application Example PIN FUNCTION DESCRIPTION Pin No. Pin Name Function Pin Description 1 PFC V This pin provides This pin is a direct connection to the V pin (Pin 6) via a low impedance switch. In CC CC the bias voltage to standby and during the startup sequence, the switch is open and the PFC V is CC the PFC controller. shut down. As soon as the aux. winding is stabilized, Pin 1 connects to the V pin CC and provides bias to the PFC controller. It goes down in standby and fault conditions. 2 FB Feedback Signal An optocoupler collector pulls this pin low to regulate. When the current setpoint reaches 25% of the maximum peak, the controller skips cycles. 3 CS/OVP Current Sense This pin incorporates three different functions: the current sense function, an internal ramp compensation signal and a 3.0 V latch off level which latches the output off until V is recycled. CC 4 GND IC Ground 5 DRV Driver Output With a drive capability of +500 mA / 800 mA, the NCP1230 can drive large Qg MOSFETs. 6 V V Input The controller accepts voltages up to 18 V and features a UVLO turnoff threshold of CC CC 7.7 V typical. 7 NC 8 HV HighVoltage This pin connects to the bulk voltage and offers a lossless startup sequence. The charging current is high enough to support the bias needs of a PWM controller through Pin 1. www.onsemi.com 2