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LM7818A中文资料来源于瑞达科技网
作者:佚名  文章来源:网络  点击数  更新时间:2011/1/13   文章录入:瑞达  责任编辑:瑞达科技

Electrical Characteristics 电气特性 (MC7818A/LM7818A)

(Refer to test circuit参照测试电路 ,0°C < TJ < 125°C, IO = 500mA, VI = 10V, CI= 0.33ìF, CO= 0.1ìF, 除非另有说明)


Parameter 参数 Symbol 符号 Conditions 条件 最小 典型 最大 单位 Output Voltage 输出电压 VOTJ =+25℃ 17.64 18 18.36 VIO =5mA to 1A, PO ≤15W VI =21V to 33V 17.3 18 18.7 Line Regulation 线性调整率 (Note1) ReglineVI=21V to 33V IO =500mA -15 180 mVVI=21V to 33V -5 180TJ =+25℃VI=20.6V to 33V -15 180 VI=24V to 30V -5 90 Load Regulation 负载调整率 (Note1) RegloadTJ =+25℃ IO =5mA to 1.5A -15 100 mVIO =5mA to 1.0A -15 100IO =250mA to 750mA -7 50 Quiescent Current 静态电流 IQTJ =+25℃ -5.2 6.0 mA Quiescent Current Change 静态电流变化 ΔIQVI =21V to 33V, TJ=+25℃ --0.8 mAVI =21V to 33V, IO =500mA --0.8IO =5mA to 1.0A --0.5 Output Voltage Drift 输出电压漂移 ΔV/ΔT IO =5mA --1.0 -mV/℃ Output Noise Voltage 输出噪声电压 VNf =10Hz to 100KHz TA =+25℃ -10 -μV/Vo Ripple Rejection 纹波抑制 RRf =120Hz, IO =500mA VI =22V to 32V -57 -dB Dropout Voltage 电压差 VDropIO =1A, TJ =+25℃ -2.0 -V Output Resistance 输出电阻 rOf =1KHz -19 -Short Circuit Current 短路电流 ISCVI=35V, TA =+25℃ -250 -mA Peak Current 峰值电流 IPKTJ=+25℃ -2.2 -A

三端稳压集成电路极限参数: Parameter 参数 Symbol 符号 Value 单位 Input Voltage输入电压 (for VO =5V to 18V)VI 35 V (for VO =24V)VI 40 V Thermal Resistance Junction-Cases  热阻(结到壳) (TO-220) RθJC 5 ℃/W Thermal Resistance Junction-Air热阻(结到空气) (TO-220) RθJA 65 ℃/W Operating Temperature Range工作温度范围 TOPR 0 ~ +125 Storage Temperature Range储存温度范围 TSTG -65 ~ +150

 

                             图1 78XX内部电路图

                   图2 78XX参照测试电路                     图3  外形引脚排列图管脚图

                            图4 纹波抑制电路

                      图5 负载调节控制电路

              图6 与79XX系列三端稳压构成的正负对称输出电压电路图

                            图7 典型应用电路图

                                图8 TO-220封装图片

                                           图9 D-PAK封装图

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