DC1706A

DC1706A demonstration circuit is a 100V LED controller with an input current monitor. It is a single switch boost LED driver with LED+ to GND short circuit protection. It accepts an input voltage from 8V to 100V (7.5V UVLO and 8.7V turn-on), and drives up to 85V of LEDs at 400mA (when PVIN is less than VLED). DC1706A features both PWM and analogue dimming of the LED string. It has a VMODE flag that indicates when the LED string has been removed and it has a FAULT flag that indicates that the output has been shorted to GND. In both cases, the IC remains in control and well-protected. DC1706A features high efficiency at 300KHz switching frequency. At high LED string voltages up to 85V and 400mA of LED current, the single switch controller has 93% efficiency. There are input current (CSOUT) and output current (ISMON) monitor pins that deliver a voltage proportional to the current for quick diagnostics.

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