Digital tube driver/LED driver

LM3555 Synchronous Boost Converter with 500 mA High Side LED Driver and Dual Mode Control Interface

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 to reach 20% 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 that occur in offline AC applications. The high anode-cathode voltage rating withstands surges common in automotive, industrial, and commercial sign applications.

LM3648 LM3648 Synchronous Boost LED Flash Driver with 1.5A High Side Current Source

TPS92411 Switch Control Direct Drive Switch for Offline LED Drivers