The MAX1582 is a white LED driver that powers up to six white LEDs in series with a constant current. The dual-segment, step-up converter includes a 30 V, low drain-source on-resistance, N-channel MOSFET switch to achieve 84% efficiency and maximum battery life. The MAX1582 operates at constant 1 MHz switching frequency, enabling use of a low-profile indicator and a 0.1 microfarad output capacitor. Other features include analog or direct-digital PWM brightness control, low 15 millivolt peak-to-peak input ripple, soft-start for zero inrush current, and overvoltage protection.
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