Digital tube driver/LED driver

This linear constant current regulator (CCR) is a simple, economical, and rugged device that provides a cost-effective solution for regulating current in LEDs (similar to a constant current diode CCD). The CCR is based on self-biasing transistor (SBT) technology and regulates current over a wide voltage range. It uses a negative temperature coefficient to protect the LED from thermal collapse at extreme voltages and currents. The CCR turns on immediately and uses only 0.5 V Vak for 35% regulation. it requires no external parts and can be designed as a high or low side regulator. the 120 V anode-cathode voltage rating withstands high peak voltages found in offline AC applications. High anode-cathode voltage ratings withstand surges common in automotive, industrial, and commercial sign applications.

LM3431 3-Channel Constant Current LED Driver with Integrated Boost Controller

TPS92314A 8-SOIC Offline Primary Sense Controller with PFC