MP2481DH-LF-P

The MP2481 is a 36V, 1.2A, white LED driver suitable for either step-down or inverting step-up/down applications. It achieves 1.2A peak output 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, input over voltage protection, open strings protection and output short circuit protection. The MP2481 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 MP2481 requires a minimum number of readily available standard external components and is available in 8-pin MSOP8E package.

• Unique step-up/down operation (buck-boost mode)
• 0.30 ohm internal power MOSFET switch
• Analog and PWM dimming
• 0.2V reference voltage
• Up to 95% efficiency, 5µA shutdown mode
• No minimum LED required
• Stable with low ESR output ceramic capacitors
• Cycle-by-cycle overcurrent protection
• Thermal shutdown/open strings/input overvoltage/output short circuit protection