NCL30095A Power Factor Corrected LED Boost Switching Regulator The NCL30095A high power factor boost PWM switching regulator is designed to regulate the average current through a string of www.onsemi.com LEDs. The circuit operates in Critical Conduction Mode (CrM) based on a proven constant ontime control scheme to achieve near unity 14 power factor. In addition to regulating a constant current, the 1 switching regulator is optimized to support leading and trailing edge phase dimming applications. When a dimmer is detected on the AC SOIC14 NB (LESS PIN 4) CASE 751DY input, an internal voltage reference of the current regulation loop adjusts the current level based on the dimmer conduction angle so the current through the LED string has a desired value based on a MARKING DIAGRAM programmed dimming curve. The shape of the dimming curve is 14 intended to emulate the response of an incandescent bulb while L30095AG achieving NEMA SSL6 and NEMA SSL7A recommendations. AWLYWW An integrated HV MOSFET in a cascoded configuration supports biasing the controller during operation and eliminates the need for an 1 auxiliary winding to provide bias power. A robust suite of protection L30095A = Specific Device Code features is included to ensure proper handling of expected fault A = Assembly Location WL = Wafer Lot conditions without the need for extra circuitry and a dedicated thermal Y = Year foldback input proves gradually reduction of the current above a user WW = Work Week defined setpoint. G = Pb-Free Package General Features NearUnity Power Factor PIN CONNECTIONS Critical Conduction Mode (CrM) 1 14 Drain Gate Constant Ontime Control Source Accurate Current Regulation (+/ 2% typical) Drain Compatible with Leading and Trailing Edge Phase Controlled CS1 Drain Dimmers GND Fast Startup Time (< 100 ms typical) COMP V CC Integrated ZCD Detection CS2 ACC TH User Programmable Thermal Current Foldback Vcc Operation up to 18 V TF OVP 7 8 (Top View) Safety Features Output Overvoltage Protection CyclebyCycle Current Limiting ORDERING INFORMATION Vcc UVLO Device Package Shipping Typical Applications NCL30095ADR2G SOIC14 2500 / Tape & (PbFree) Reel LED Bulbs LED Downlights For information on tape and reel specifications, including part orientation and tape sizes, please LED Light Engines refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. LED Modules Semiconductor Components Industries, LLC, 2017 1 Publication Order Number: September, 2017 Rev. 1 NCL30095A/DNCL30095A V in V out L 1 D 1 R 0L AC L FZ C x R ovp top D C in R L casc 0L R 1 acc top DRAIN 14 GATE 2 13 DRAIN SOURCE R C 0N out AC N 3 12 DRAIN CS1 R x R acc bot 11 D 2 GND C 5 10 L Dz casc 0N casc COMP VCC C comp 6 9 CS2 ACC TH C vcc 78 OVP TF C cc R R NTC TF Figure 1. NCL30095A Application Schematic Table 1. PIN FUNCTION DESCRIPTION Pin No. Pin Name Function Pin Description 1, 2, 3 DRAIN Drain of HV switch The Drain of the High Voltage NMOS. 5 COMP Compensation Feedback loop compensation pin of the IC. 6 ACC TH Diming Detection Input This pin receives a portion of the AC input voltage. It is compared to an inter- nal reference voltage in order to determine the presence of a dimmer state and the phase angle. 7 TF Thermal Foldback Connecting an NTC to this pin allows linear reduction of the output current above a user programmed temperature setpoint. 8 OVP OverVoltage Protection Input This pin receives a portion of the Boost output voltage V and serves to OUT trigger an OVP fault in the event the LED string is open. nd 9 CS2 2 Current Sense Input This pin monitors the LED load current across the R resistor during the sense2 off time. This pin is used to monitor the instantaneous load current for regula- tion loop, and to determine when the Zero Current Detection (ZCD) point is reached. 10 VCC V Input This positive supply pin accepts up to 18 Vdc. The supply for the device is CC ensured by the external diode from the source pin. 11 GND The switching regulator ground st 12 CS1 1 Current Sense Input This pin monitors the inductor current across the R resistor during the sense1 ontime. This pin monitors the maximum current cycle by cycle. 13 SOURCE Source of HV Switch The Source of the High Voltage NMOS. Connect the external diode between the source and VCC pin to provide the IC supply. 14 GATE Gate of HV Switch The Gate of the High Voltage NMOS. External circuitry is used to bias this pin to 20V. www.onsemi.com 2 R ovp bot R sense1 R sense2