PAM2806AF-升压恒流调光驱动 5功能

概述：

PAM2806是3W高能升压可调光LED驱动器，此芯片延续了PAM2803极小封装SOT23-6，外围简单，适用于1节或2节干电池，输出电流可以根据外部电阻调节来实现，取代了传统的PAM2803加单片机的产品方案---成本高外围复杂线路板不能做小。5功能（PAM2806）：100%亮  50%亮25%亮爆闪SOS

特点：                                                                                                                                                           

◆负载电流可达：1A。                                                                                                             

◆固定1MHz开关频率。                                                                                                            

◆使用较小的电感和陶介电容。                                                                                                   

◆输入电压：1.8−3.6V.LED电流可通过外部电阻设定。                                                                          

◆反馈电压95mV.                                                                                                                    

◆具有2A NMOS开关管（100mΩ）在高负载下可提供高效率。                                                                         

◆通过DC直流电压加到FB端对LED亮度进行细调或PWM信号加到SHDN 。                                                             

◆LED功能效率达：90％。                                                                                                           

◆电流精度：±5％。                                        

◆低启动电压：0.9V（Iled＝270mA）。                                                                                            

◆低维持电压：0.75V（LED电流＝200mA）。                                                                                        

◆内部2AMOSFET开关，开路LED保护，过温保护。                                                                                    

适用范围：                                                                                                                          

白光驱动器（闪光灯）、数码照相机闪光灯、移动电话闪光灯、PDA相机闪光灯。                                                 

封装：SOT23-6，最小包装3K，绿色无铅封装。