GM2102
DESCRIPTION
The GM2102 is a member of Gamma Microelectronics’s family of white LED drivers. The GM2102 is a fixed frequency step-up DC/DC converter designed to operate as a constant-current source. It is ideal for driving light emitting diodes (LEDs) whose light intensity is proportional to the current passing through them and not on the voltage across their terminals as it directly regulates the output current. The wide input voltage range allows the device to work from a variety of input sources. A single external resistor sets LED current between 5m A and 40m A, which can then be easily adjusted using either a DC voltage or a PWM signal. In Shutdown mode, the LED’s are disconnected from the output with the maximum quiescent current of 1µA for the entire circuit.
FEATURES
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- - Drives Six White LED’s from 1.8 V 1.2Mhz Fixed Frequency Switching Minimum operating input voltage 1.2V 90% efficiency Accurately adjustable LED current Current Regulation even when Vin > Vout...
