OJX Current Mode Boost-Type LED Driver with Programmable Dimming Control

OJX is a constant frequency, current mode Boosttype LED driver belonging to the RT8537GQW series on L3+ hash board. In normal operation, the N-MOSFET is turned on when the PWM Control circuit is set by the oscillator and is turned off when the current comparator resets the PWM Control circuit.  While the N-MOSFET is turned off, the inductor current conducts through the external diode.

Electrical Characteristics:

Operating Quiescent Current into VIN: 2.3mA

Shutdown Current: 1μA

Under Voltage Lockout Threshold: max 2.5V

Under Voltage Lockout Hysteresis: 70mV 

Oscillator Frequency: max 1.5MHz

Maximum Duty Cycle: 93%