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The RT8576A is an 4-CH LED driver capable of delivering 120mA for each channel. The RT8576A is a current-mode Boost converter with an adjustable switching frequency via the RT pin from 100kHz to 1MHz and a wide VIN range from 9V to 28V.<br /><br />The PWM output voltage loop selects and regulates the LED strings with the highest voltage, hence, it allows voltage mismatches between LED strings. The RT8576A automatically detects and disconnects any unconnected and/or broken strings during operation from PWM loop to prevent V<sub>OUT</sub> from over voltage.<br /><br />The 1.5% matched LED currents on all channels are simply programmed with a resistor. PWM dimming is implemented with external PWM input signal.<br /><br />When an abnormal situation (OVP/short/thermal) occurs, a state signal will be sent to the system to shut down the IC.
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  • Wide Input Supply Voltage Range : 9V to 28V
  • Adjustable Boost Controller Switching Frequency from 100kHz to 1MHz
  • Programmable Channel Current up to 180mA
  • Channel Current Matching : 1.5%
  • External Dimming Control
  • Boost MOSFET Over-Current Protection
  • Automatic LED Open/Short Protection
  • VIN Under-Voltage Lockout
  • Adjustable Over-Voltage Protection
  • Thermal Shutdown Protection
  • Abnormal State Indicator for OVP/Short/Thermal Condition
  • RoHS Compliant and Halogen Free
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LCD TV, Monitor Display Backlight<br />LED Driver Application<br />General Purpose Constant Current Source
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Keyword 1

Keyword 2

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