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Features & Benefits
- 1.2A Maximum Output Current
- Unique Step-up/down Operation (Buck-Boost Mode)
- Wide 4.5V to 36V Operating Input Range for Step-Down Applications (Buck Mode)
- 0.30O Internal Power MOSFET Switch
- Fixed 1.4MHz Frequency
- 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
Active Part Numbers:
The EV2481-H-00A is a Buck converter evaluation board for the MP2481, a wide input step-down converter designed for driving high-power white LEDs with up to 1A capability.
The MP2481 is a 1.2A output, 36V 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, open LED 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 MSOP8 packages.