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
