CAT4101 pdf,datasheet1 A Constant-Current LED Driver with PWM DimmingThe CAT4101 is a constant−current sink driving a string ofhigh−brightness LEDs up to 1 A with very low dropout of 0.5 V at fullload. It requires no inductor, provides a low noise operation andminimizes the number of components. The LED current is set by anexternal resistor connected to the RSET pin. The LED pin iscompatible with high voltage up to 25 V, allowing the driving of longstrings of LEDs. The device ensures an accurate and regulated currentin the LEDs independent of supply and LED forward voltagevariation.
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