Santa Clara, Calif.—Catalyst Semiconductor's
CAT4134, for up to six white/color LEDs, is a 500-mA inductive boost driver optimized for Movie/Flash applications, and for industrial video lighting, still camera, flashlight, and LCD backlighting.
The dual-channel device, which runs off an input source as low as 3 volts, provides matched LED currents up to a total of 500 mA. Output current levels are controlled by one of two resistors, RSET or RFLASH. When the flash input pin is low (Movie mode), RSET 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.
The device can be placed into a "zero" quiescent mode via a shut-down pin. 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.
Click here for the product datasheet. The CAT4134, in a 3-by-3 mm, 12-pin TDFN RoHS-compliant package, is priced at 88 cents each in 10k quantities. Samples and evaluation kits are now available. Projected lead-times for production quantities are currently 6 to 8 weeks ARO.
Catalyst Semiconductor, 1-408-542-1000, www.catsemi.com