Monolithic Power Systems MP24833

Description

The MP24833 is a 55V, 3A, white LED driver suitable for step-down, inverting step-up/down and step-up applications. It achieves 3A 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 strings protection and output short circuit protection.

The MP24833 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 MP24833 requires a minimal number of readily-available standard external components and is available in an SOIC8E package.

Features

• 3A 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)
• 0.19Ω Internal Power MOSFET Switch
• Fixed 200kHz Switching Frequency
• Analog and PWM Dimming
• 0.198V Reference Voltage
• 6μA Shutdown Mode
• No Minimum Number of LEDs Required
• Stable with Low ESR Output Ceramic Capacitors
• Cycle-by-Cycle Over-Current Protection
• Thermal Shutdown Protection
• Open Strings Protection
• Output Short-Circuit Protection
• Available in an SOIC8E Package

Typical applications

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

More information

• Datasheet
• IC product information