Monolithic Power Systems MPQ2483

Description

The MPQ2483 is a 55V, 2.5A, white LED driver suitable for either step-down or inverting step-up/down applications. It achieves 2.5A 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, output over voltage protection, open strings protection and output short circuit protection.The MPQ2483 incorporates both DC and PWM dimming onto a single control pin. The separate input reference ground pin allows for directenable and/or dimming control for a positive to negative power conversion.The MPQ2483 requires a minimum number of readily available standard external components and is available in a 10-pin 3mm x 3mm QFN package.

Features

• Guaranteed Industrial Temperature Range Limits
• 2.5A Maximum Output Current
• Unique Step-up/down Operation (Buck- Boost Mode)
• Wide 4.5V to 55V Operating Input Range for Step-Down Applications (Buck Mode)
• 0.28Ω Internal Power MOSFET Switch
• Adjustable Switching Frequency
• Analog and PWM Dimming
• 0.198V Reference Voltage
• 5μA Shutdown Mode
• No minimum LED required
• Stable with Low ESR Output Ceramic Capacitors
• Cycle-by-Cycle Over Current Protection
• Thermal Shutdown Protection
• Open Strings Protection
• Output Over Voltage Protection
• Output Short Circuit Protection
• Available in a 10-pin 3x3mm QFN Package

Typical applications

• Portable Multimedia Players
• Automotive Internal Lighting
• General LED Illumination
• Handheld Computers
• LCD Backlight Panels
• Portable GPS Devices

More information

• Datasheet
• IC product information