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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 (DHC) Function

z Constant Output Current Range : 5mA to 150mA

z Support 400ns Narrow PWM Pulse

z Fault Detection for OTP, LED Open/Short

z RoHS Compliant and Halogen Free

Applications

z LED Backlight