55V, 2.5A Programmable Frequency LED Driver

The MPQ2483A is a 55V, LED driver suitable for either step-down or inverting step-up/down applications. It achieves 2.5A peak current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes thermal shutdown, cycle-by-cycle peak current limiting, output over voltage protection, open strings protection and output short circuit protection. The MPQ2483A incorporates both DC and PWM dimming onto a single control pin. The separate input reference ground pin allows for direct enable and/or dimming control for a positive to negative power conversion. The MPQ2483A requires a minimum number of readily available standard external components and is available in a 10-pin 3mm x 3mm QFN and SOIC 14-pin packages. 2.5A Maximum Peak Current Buck or Buck-Boost Modes Wide 4.5V to 55V Operating Input Range 0.28? Internal Power MOSFET Switch Analog and PWM Dimming 0.198V Reference Voltage 5µA Shutdown Mode Stable with Low ESR Capacitors Cycle-by-Cycle Over Current Protection Thermal Shutdown, Over Voltage, Short Circuit & Open String Protection AEC-Q100 Qualified