Catalyst charge pump architecture LED driver IC offer less than 1 yuan

Analog and mixed signal devices and nonvolatile memory semiconductor supplier Catalyst days before launch by the adaptive fractional charge pump for a new generation of LED driver's first chip CAT3636. The release of this chip, the efficiency of the LED drive to a new level. CAT3636 is based on the design of Catalyst's innovative Quad-Mode conversion architecture (which is patent pending) and can drive up to 6 White / color LED. Under the condition of not increasing the cost, the number of components and the board space, the CAT3636 not only gives the system designer the efficiency of approaching the inductor boost converter, but also maintains the simplicity of the charge pump.

Quad-Mode charge pump architecture Catalyst semiconductor innovation, can not only provide high efficiency and inductive LED drive, but also can avoid the high thickness with inductor and EMI interference. Most of today's charge pump LED drives offer 3 operating modes based on the ratio of the output voltage to the input voltage: 1X, 1.5x, and 2x. The CAT3636 Quad-Mode architecture adds fourth modes of operation - 1.33x, and no additional capacitors are added. The 1.33x boost mode also reduces the input switching current at the end of the battery, which minimizes the input noise of the system, which is an important parameter in portable devices such as mobile phones.

By Quad-Mode architecture, the new CAT3636 chip can provide high efficiency up to 92% (the average efficiency of lithium batteries in the effective working voltage range is 84%), and can save board space and cost. In addition to saving space and cost of 3 x 3mm, TQFN micro package, the rise of ultra-thin portable product design provides a new choice.

CAT3636 contains 3 groups of 6 LED drive channel, each consisting of two constant current and strictly matching channel. Catalyst flexible single line EZDim programming interface (including address and data information) allows the user to complete the CAT3636 programming and dimming control, so the state of each group can be set up separately and accurately. This reduces the number of pins and interface connections, while maintaining a flexible control of the main or subordinate color LCD display backlight function or portable RGB LED, Flash flash. Price and supply of green packaging

With 3 x 3mm, 16 pin, micro thin (0.8mm) TQFN package, in accordance with the requirements of RoHS CAT3636 has begun to supply the pins for lead-free matte tin (Matte Tin) process. The order code for this product is CAT3636HV3-T2, each of the 10000 offer is $0.94 / piece. Samples and evaluation board has now begun to supply, the bulk delivery time is 6 ~ 8 weeks after receipt of order.