Status: In Production
The MIC2299 is a high power boost-switching regulator that is optimized for constant-current control. The MIC2299 is capable of driving up to two series 1A white LED for photoflash and other applications. The feedback voltage is only 200mV, minimizing power dissipation in constant-current control applications, and hence extends battery life.
The MIC2299 has a brightness pin that allows for a programmable torch mode as well as full flash with a single pin when driving high current LEDs.
The MIC2299 implements a constant frequency 2MHz PWM control scheme to make the smallest possible design. The MIC2299's 2MHz operation avoids signal interference in the AM band.
The 2.5V to 10V input voltage range of MIC2299 allows direct operation from 1- and 2-cell Li-Ion as well as 3- to 4-cell NiCad/ NiMH/ Alkaline or lithium batteries . Maximum battery life is assured with a low 1µA shutdown current.
This board enables the evaluation of the 3.5A switch, High Power white LED driver MIC2299. 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 this to be programmed either with additional resistors or voltages on the DIM or BRT pins. A load disconnect switch prevents leakage and protects the battery...
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