Status: In Production
The MIC2298 is a high power boost-switching regulator that is optimized for constant-current control. The MIC2298 is capable of driving up to two series 1A white LED for photoflash, flashlight and other applications. The feedback voltage is only 200mV, minimizing ballast power dissipa-tion in constant-current control applications for improved operating efficiency.
The MIC2298 has a brightness pin that allows for a programmable torch mode as well full flash with a single pin when driving high current LEDs.
The MIC2298 implements a constant frequency 1MHz PWM control scheme to make the smallest possible design.
The 2.5V to 10V input voltage range of MIC2298 allows direct operation from 1- and 2-cell Li-Ion as well as 3- to 6-cell NiCad/NiMH/Alkaline battery sources. Maximum battery life is assured with a low 1µA shutdown current.
This board enables the evaluation of the MIC2298, a fully integrated 7W net output minimum High Power white LED driver. The board includes components necessary to set the LED current to 20%, 50% and 100% of the nominal LED current (1A). The external inputs also allow the LED current to be programmed either with additional resistors or voltages on the DIM or BRT pins. Also the enable pin can be...
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