Full PDF Text Transcription for HY7700 (Reference)
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Description HY7700 is a PWM high-efficiency LED driver controller IC. It allows efficient operation of High Brightness （HB） LED(s) from voltage sources ranging from 9VDC ...
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of High Brightness （HB） LED(s) from voltage sources ranging from 9VDC up to 450VDC. HY7700 controls an external MOSFET at variable switching frequency up to 300 kHz. The constant off-time can be programmed using a single resistor. The LED string is driven at constant current rather than constant voltage, thus providing constant light output and enhanced reliability. The output current can be programmed between a few milliamps and up to more than 1.0A . Typical Applications Circuit HY7700 High Brightness LED Driver Features n >90% efficiency. n 9V to 450V input Range. n Constant Current LED driver. n More than 1.0A output a
HY7700 Datasheet
