发布者：微桥FP7101 发布时间：2010/1/14 阅读：9571次    关键字： FP7101A LED

FP7101A   2A Constant Current Buck Converter for Powering LEDs General Description Download     The FP7101A is a current-mode buck regulator with a built in internal 2A power MOSFET. lt provides a simple, high efficiency solution for driving high power LEDs. With a 0.2V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. Current mode operation provides fast transient response and eases loop stabilization. The FP7101A requires a minimum number of readily available external components to complete a 2A buck regulator solution. The device includes cycle-by-cycle current limiting and thermal shutdown protection. Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs. 　 ˙Data Sheet Features ˙2A Output Current ˙0.22Ω lnternal Power MOSFET Switch ˙Stable with Low ESR Output Ceramic Capacitors ˙Up to 90% Efficiency ˙25μA Shutdown Mode Current ˙Fixed 380KHz frequency ˙Thermal Shutdown ˙Cycle-by-Cycle Over Current Protection ˙Wide 4.75 to 23V operating lnput Range ˙Output Adjustable From 0.2 to 16V ˙Available SOP8 & PDIP8 Package ˙Available SOP8 Exposed PAD ˙Under Voltage Lockout