NCP1650 Power Factor Controller The NCP1650 is an active, power factor correction controller that can operate over a wide range of input voltages, and output power levels. It is designed to operate on 50/60 Hz power systems. This controller offers several different protection methods to assure safe, reliable operation under any conditions. www.onsemi.com The PWM is a fixed frequency, average current mode controller with a wide complement of features. These features allow for both flexibility as well as precision in its application to a circuit. Critical SO16 components of the internal circuitry are designed for high accuracy, D SUFFIX 16 CASE 751B which allows for precise power and current limiting, therefore 1 minimizing the amount of overdesign necessary for the power stage components. MARKING DIAGRAM The NCP1650 is designed with a true power limiting circuit that will maintain excellent power factor even in constant power mode. It also 16 contains features that allow for fast transient response to changing NCP1650G load currents and line voltages. AWLYWW Features 1 Fixed Frequency Operation A = Assembly Location Average Current Mode PWM WL = Wafer Lot Continuous or Discontinuous Mode Operation Y = Year WW = Work Week Fast Line/Load Transient Compensation G = PbFree Package True Power Limiting Circuit High Accuracy Multipliers Undervoltage Lockout PIN CONNECTIONS Overvoltage Limiting Comparator V 1 OUTPUT in 16 Brown Out Protection V 2 15 GND ref Ramp Compensation Does Not Affect Oscillator Accuracy AC COMP 14 C 3 T Operation from 25 to 250 kHz AC REF 4 13 RAMP COMP This is a PbFree Device AC INPUT I 5 12 S Typical Applications FB/SD 6 11 I avgfltr Server Power Converters LOOP COMP I 7 10 avg Front End for Distributed Power Systems P Pmax 8 9 COMP (Top View) ORDERING INFORMATION Device Package Shipping NCP1650DR2G SOIC16 2500/Tape & Reel (PbFree) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: March, 2015 Rev. 13 NCP1650/DNCP1650 PIN FUNCTION DESCRIPTION Pin Function Description 1 V Provides power to the device. This pin is monitored for undervoltage and the unit will not operate if the CC V voltage is not within the UVLO range. CC 2 V 6.5 V regulated reference output. This reference voltage is disabled when the chip is in the shutdown ref mode. 3 AC Provides pole for the AC Reference Amplifier. This amplifier compares the sum of the AC input voltage Compensation and the low frequency component of the input current to the reference signal. The response must be slow enough to filter out most of the high frequency content of the current signal that is injected from the current sense amplifier, but fast enough to cause minimal distortion to the line frequency information. 4 AC REF This pin accommodates a capacitor to ground for filtering and stability of the AC error amplifier. The AC error amplifier is a transconductance amplifier and is terminated with an internal high impedance load. 5 AC Input The rectified input AC rectified sinewave is connected to this pin. This information is used for the reference comparator, maximum power circuit, and the average current compensation circuit. 6 Feedback/ The DC output of the converter is reduced through a resistive voltage divider, to a level of 4.0 V, and Shutdown connected to this pin to provide feedback for the voltage regulation loop. This pin also provides an input undervoltage lockout feature by disabling the chip until the divided output voltage exceeds 0.75 V. It can also be used as a shutdown pin by shorting it to ground with an open collector comparator, or a small signal transistor. 7 Loop A compensation network for the voltage regulation loop, is connected to the output of the voltage error Compensation amplifier at this pin. 8 P A compensation network for the maximum power loop, is connected to the output of the power error COMP amplifier at this pin. 9 P This pin allows the output of the power multiplier to be scaled for the desired maximum power limit level. MAX This multiplier is a proprietary switching design and requires both a resistor and capacitor to ground. The value of this resistor is determined in conjunction with R10. 10 I An external resistor with a low temperature coefficient is connected from this terminal to ground, to set avg and stabilize the gain of the Current Sense Amplifier output that drives the Power Multiplier and the AC error amplifier. This resistor should be of the same type as that used on pin 9. The value of this resistor will determine the maximum average current that the unit will allow before limiting will occur. 11 I A capacitor connected to this pin filters the high frequency component from the instantaneous current avgfltr waveform, to create a waveform that resembles the average line current. 12 I Negative current sense input. Designed to connect to the negative side of the current shunt. S 13 Ramp This pin biases the ramp compensation circuit, to adjust the amount of compensation that is added to the Compensation instantaneous current and AC error amp outputs. 14 C Timing capacitor for the internal oscillator. This capacitor adjusts the oscillator frequency. T 15 Ground Ground reference for the circuit. 16 Output Drive output for power FET or IGBT. Capable of driving small devices, or can be connected to an external driver for larger transistors. www.onsemi.com 2