DESCRIPTION

The MP24830 is a 90V white LED driver suitable for either step-down or inverting step up/down applications. It supports a wide input range with excellent load and line regulation. Its programmable current limit provides customized applications with a wide power range. Current mode operation provides a fast transient response and eases loop stabilization. Fault condition protection includes thermal shutdown, cycle-by-cycle peak-current limiting, open-string protection, and output short-circuit protection. The MP24830 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 MP24830 requires a minimal number of readily-available external components. It is available in 14-pin SOIC and QFN packages.

FEATURES

Programmable Maximum Output Current Unique Step-Up/Down Operation (Buck-Boost Mode) Wide 4.5V-to-90V Operating Input Range for Step-Down Applications (Buck Mode) Adjustable Switching Frequency Analog and PWM Dimming 0.2V Reference Voltage 10μA Shutdown Mode No Minimum LED Quantity Required Stable with Low ESR Output Ceramic Capacitors Cycle-by-Cycle Over-Current Protection Thermal Shutdown Protection Open-String Protection Output Short-Circuit Protection Available in 14-Pin SOIC and QFN Packages

APPLICATIONS

General LED Illumination Automotive LED Lighting LCD Backlight