Catalyst Announces 500mA Inductive LED Driver for Movie/Flash Mode Applications

Catalyst Semiconductor, Inc. announced the availability of a high power, 500mA inductive boost LED driver for Movie/Flash mode applications. The new CAT4134 offers a fully integrated Movie/Flash switching function which allows designers to set the exact Flash and Movie modes required via a single resistor, minimizing the need for external circuitry. Capable of driving up to six white/color LEDs, the CAT4134 is well-suited for increasing efficiency and simplifying the design of industrial video lighting, still camera, flashlight, LCD backlighting and other high-power LED applications.

The new Catalyst inductive boost LED driver offers dual channel outputs which provide matched LED currents of up to 500mA total. Output current levels are controlled by one of two resistors RSET or RFLASH. When the flash input pin is low (Movie mode), R controls the LED current. When the flash input pin is high (Flash mode), the resistor RFLASH controls the LED current. Each channel drives two or three white LEDs in series and provides a regulated current to control LED brightness. Input supply down to 3V is supported, making the device well-suited for Li-Ion battery applications.

High frequency, low noise operation allows the CAT4134 to be used with small external inductors and ceramic capacitors while retaining efficiency (up to 85%), making it suitable for space and power-constrained applications. When disabled the device can be placed into a "Zero" quiescent mode via a shut-down pin, eliminating battery drain when not in use. In addition to soft-start control and current limiting, the CAT4134 offers protection against short-circuit and thermal overload fault conditions. A dedicated over-voltage protection pin (OVP) allows users to set the maximum operating voltage at the output.

The CAT4134 is available in a 3x3mm, 12-pin TDFN RoHS-compliant package. Plated lead finish is matte tin. The ordering code is CAT4134HV2 and pricing for 10,000 piece quantities is $0.88 each. Samples and evaluation kits are now available. Projected lead-times for production quantities are currently 6 to 8 weeks ARO.