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Product

MP2481 

Product Info

36V, 1.2A, 1.4MHz White LED Driver

Description

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, cycle­by­cycle 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 MSOP8 package.

Features

• 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)
• 0.30Ω 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

Typical Application

 

Efficiency Curve

 

Vin (Min) (V)

4.5 

Vin (Max) (V)

36 

Power (W)

Control Method

Buck-Boost 

Solution Type

Regulator 

Package 1

MSOP8 

Package 2

Package 3

Datasheet Download

Click here to download datasheet 

Eval Board Download

EV2481-H-00A
EV2481-H-01A

App Note

App Note 

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