升压恒流3功能手电筒驱动IC-PAM2805
价格:电议
地区:上海
电 话:86 021 57242903
手 机:15821432321
传 真:86 021 67291366

 

概述:

PAM2805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。3功能(PAM2805):100%全亮,25%亮,爆闪。

 

 

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:±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,小包装3K,绿色无铅封装。