RT8300

® RT8300 4-CH 150mA Constant Current LED Driver General Description The RT8300 is a 4-CH 150mA constant current sink LED driver capable of driving four channel constant currents with good matching ability and wide range VF variations. The RT8300 provides four channel constant currents with less than 3% differences in output current value among the 4-CH and ICs respectively. The constant current output is adjustable from 5mA to 150mA via an external resistor (RISET). The LED brightness can also be adjusted via the PWMI pin with pulse width modulation from 0% to 100%. Thus allowing for wide VF variation. Moreover, the RT8300 provides Dynamic Headroom Control (DHC) function which can generate feedback signal to DC/DC control loop and regulate the output voltage of the RT8300. The RT8300 features LED open/short protection. If any channel has open or short condition, that particular output channel will be turned off and the FAULT pin will pull low. The RT8300 also supports Over Temperature Protection (OTP). When OTP is triggered, all output channels will be turned off and the FAULT pin will pull low. The RT8300 is available in DIP-16 (BW) and SOP-16 packages to achieve optimized solution for PCB space. Features z 4 Constant Current Output Channels z Wide Power Supply Voltage Range : 5V to 24V z Maximum Constant Current Output Voltage : 60V z Low Dropout Voltage : 600mV at 120mA Output Current z Constant Output Current Accuracy Between Channels : <±3% z Dynamic Headroom Control ...