Auto Electronics

LED DRIVER HANDLES LOAD-DUMP TRANSIENTS UP TO 40 V

Catalyst Semiconductor Inc. has expanded its family of solid-state illumination products with the white LED driver targeted at LED indicator and interior lighting applications. The CAT310 drives up to 10 color 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 datastream, stores the state condition of each output channel, and upon command, latches the input data to enable, or 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 in applications such as signboards or interior lighting systems.

Each channel is comprised of a low on-resistance open drain FET, which can sink up to 50 mA, with the current through each LED being set by a series resistor. Manufactured on high-voltage CMOS technology, the CAT310 operates with input voltages as high as 17 V. Overvoltage detection, undervoltage lockout and overcurrent detection each serve to protect the device and output LEDs during fault conditions.

The CAT310 offers a robust solution for driving multicolor LEDs across the full automotive temperature range of -40 °C to +125 °C, and in harsh system environments. The integrated suite of features reduces external component count and minimizes the traditional reliance on upstream protection devices.

The CAT310 is available in a 20-pin SOIC package and is priced at $0.95, in 1,000 piece quantities. The CAT310 is available in environment-friendly packages that are halogen- and lead-free with RoHS compliance. Samples and production quantities are available.
Catalyst Semiconductor Inc. • (408) 542-1000www.catalyst-semiconductor.com

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