Catalyst uses TSOT-23 packaged 7W buck LED driver

Catalyst semiconductor company (NASDAQ Stock Code: CATS) today announced a TSOT-23 package using innovative buck converter products, this product is suitable for driving high brightness, output current up to 350mA LED, conversion efficiency as high as 94%. CAT4201 as the first product of the buck converter family has a patent pending Catalyst - a new switching control algorithm. This new architecture can reduce the complexity of the system, improve the efficiency, the highest in 24V power supply, allowing an external RSET control resistance up to adjust the 350mA LED current, better control of inductance and without special thermal design. In Buck high brightness LED driver applications, CAT4201 buck converter provides advantages over linear regulator is simpler and smaller, but also save the heat sink. In addition, the built-in overload protection can safely handle the instantaneous 40V voltage, making it very suitable for automotive instrumentation and lighting, including steering signals, brake systems and map reading lighting, etc.. Traditionally has been using a linear regulator to drive the LED group in the power supply system of 12V or 24V, but this structure will produce a lot of heat consumption, resulting in heat sink need special, so usually uses very large TO263 package. CAT4201 uses a patented new switch control algorithm, with only one external resistor can easily control the average current of LED. This greatly reduces the internal power dissipation of the CAT4201 so that it can be packaged in a 5 pin TSOT23 package, without the need for dedicated fins. In addition, the switching frequency of the device can be up to 1MHz, which is ideal for applications requiring small and inexpensive external inductors.

LED current CAT4201 product features - can drive up to 350mA - compatible with 12V and 24V power supply system, security 40V - instantaneous voltage single pin and enable dimming control - power conversion efficiency as high as 94% - drive up to 7 series LED (24V) - TSOT-23 5 pin package supply and price when the order quantity is 10000, the CAT4201 buck converter at $0.72. Sample available now. Estimated delivery time is 6 ~ 8 weeks after receipt of order

Source: the world of electronic products