FEATURES
Dual Mode (Movie or Flash) operation Independent Movie/Flash LED current control Can drive 2, 3, 4 or 6 LEDs High LED Current (250mA max per channel) Power efficiency up to 85% Dual frequency mode 1.2MHz and 900kHz Soft-start inrush current Adjustable overvoltage protection Thermal shutdown protection Operating temperature range -40ºC to +85ºC 12-pad TDFN 3mm x 3mm package DESCRIPTION
Output current levels are controlled by one of two resistors RSET or RFLASH. Each channel drives two or three white LEDs in series and provides a regulated current to control their brightness. Input supply down to 3V is supported, making the device ideal for Li-Ion battery applications. High frequency low noise operation allows the device to be used with small external inductors and ceramic capacitors while still maintaining excellent efficiency. When not in use the device can be placed into a “zero” quiescent mode via the shutdown pin. In addition to soft-start control and current limiting, the CAT4134 include thermal shutdown protection.
Catalyst Semiconductor
