The QX62726 is a 16 bits constant current LED driver with very low dropout voltage (less than 300mV at 90mA) for LED display. The constant current can be set between 4mA to 90mA by an external resistor. The QX62726 consists of a 16-bits serial-in parallel-out shift register, a 16-bits latch, 16 low dropout constant current generators and a current setTIng circuits.