NCL30167 Datasheet - ON Semiconductor

NCL30167 LED Boost Switching Regulator

Table 1. PIN FUNCTION DESCRIPTION Pin Number Pin Name Function 1 ACC_TH Dimming Detection Input 2 TF Thermal Fold-back 3 OVP Over Voltage Protection Input 4 CS2 2nd Current Sense Input 5 VCC VCC Input 6 GND * 7 CS1 1st Current Sense Input 8 DRV Drive for HV Switch .

NCL30167 Power Factor Corrected LED Boost Switching Regulator The NCL30167 high power factor boost PWM switching regulator is designed to regulate the average current through a string of LEDs. The circuit operates in Critical Conduction Mode (CrM) based on a proven constant on-time control scheme to achieve near unity power factor. In addition to regulating a constant current, the switching regulator is optimized to support leading and trailing edge phase dimming applications. When a dimmer is .

NCL30167 Features

* are included to ensure proper handling of expected fault conditions without the need for extra circuitry and a dedicated thermal fold-back input proves gradually reduction of the current above a user defined set-point. Features

* Near-Unity Power Factor

* Critical Conduction Mode (Cr

NCL30167-ONSemiconductor.pdf