Opto-Electronics


10-bit serial latched LED driver

18 May 2005 Opto-Electronics

Catalyst Semiconductor has introduced a white LED driver targeted at LED indicator and interior lighting applications. The CAT310 drives up to 10 colour or white, LEDs, and safely handles 'load dump' transients to 40 V, making it ideal for automotive systems. A serial to parallel shift register accepts up to a 10-bit data stream, stores the state condition of each output channel, and upon command, latches the input data to enable/disable the outputs. This provides LED blanking and pattern control for signal indication in applications such as diagnostic tools or control panels. A serial output allows the user to cascade multiple CAT310 drivers to illuminate systems of LEDs. Each channel is comprised of a low on-resistance open-drain FET which can sink up to 50 mA. The device operates with inputs as high as 17 V. Over-voltage detection, under-voltage lockout and over-current detection protect the device and output LEDs during fault conditions. The CAT310 comes in 20-pin SOIC package.



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