产品分类

KA7500B开关稳压器控制器电路

概述

KA7500B是一块脉冲宽度调制方式的开关稳压器控制器电路由基准电压振荡器误差放大器比较器FF(触发器) 输出控制电路输出晶体管和空载时间等电路构成输出晶体管能够用输出控制电路选择推挽工作或单端放大工作。

特点

1.输出电流:IO = 200mA
2.工作频率:f = 1 ~ 300kHz
3.内置两个相同类型的误差放大器
4.内置5V基准电压
5.可选择输出方式

脉宽调制集成电路KA7500B各引脚功能及实测数据

引脚号        引脚功能                                                          工作电压（V）       
    1        电压取样放大器同相输入端                                      4.8                              
    2        电压取样放大器反相输入端                                      4.6                             
    3        反馈控制端                                                           2.2                               
    4        脉宽调制输出控制端（死区控制端）                           0        
    5        振荡1                                                                  0.6                                        
    6        振荡2                                                                    0                                  
    7        地                                                                         0                                 
    8        脉宽调制输出1                                                         2                                  
    9        地                                                                          0                                 
   10       地                                                                          0                                 
   11       脉宽调制输出2                                                         2                                  
   12       电源输入端                                                              5                                  
   13       输出方式控制端                                                        5                                  
   14       电压取样比较放大器负端                                            5                                
   15       电流取样放大器反相输入端                                         5                                
   16       电流取样放大器同相输入端                                         2