一种采用电压补偿技术的DC_DC开关电源软启动电路.pdfVIP

32 1 Vol. 32, 1 2002 2 Microelectr onics Feb.2002 : 1004-3365(2002) 01-0020-03 DC/ DC 王海永, 李永明, 陈弘毅 (, 100084) : 　提出了一种采用BiCMOS 工艺和电压补偿技术实现的软启动 制电路。该电路消除了 浪涌电流现象,避免了开关电源重启动。HSPICE 模拟表明, 对于 一个输入电压为 10 V 、输出电压 为3. 3 V 的降压型开关电源系统, 负载电流为3.3 A 的条件下,利用该软启动电路, 电感电流和输 出电压近似分别以3.3 A/Ls 和2.5 V/Ls 速度平稳上升,表明该软启动电路的 制能力很强。 此 制思想和结构适合各种DC/ DC 开关电源的软启动电路设计。 : 软启动电路; DC/ DC 开关电源; 电压补偿技术 : 　TN 431 :A - / A Novel Soft Start Circuit for DC DC Switching Regulator Using Voltage Compensation Technique WANG Hai-yong,LI Yong- ing, CHEN Hong-yi ( , , 100084, . . ) I nsti tut e of M icroelect ronics T s ing hua Univ er si ty Beij ing P R China Abstract: A BiCMOS-co patible soft-start circuit is presented, for which the technique of voltage co pensa- - . - tion is adopted to get rid of the surge current and avoid therestart of the switching regulator T he soft start circuit is used in a step-down switching regulator syste . HSPICE si ulation shows that, while the syste has an input 10 3. 3 3.3 , voltage of V and an output voltage of V at a load current of A the inductance current and output volt- age increases placidly at approxi ately 3. 3 A/Ls and 2.5 V/ Ls, respectively. T he design idea and circuit struc- ture presented in the paper can be used in various DC DC switching regulators/ . - ; / ; Key wor s:Soft start circuit DC DC switching regulator Voltage co pensation technique