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单片开关式集成稳压器被誉为新型高效节能稳压电源,其电源效率可达90％以上。由于它把开关功率管也集成在芯片中,所以不仅性能优良,而且外围电路简单,为开关电源的推广与普及创造了条件。 单片开关式集成稳压器的典型产品有意大利SGS公司生产的L4960、L4962及L296(国内对应型号是CW 4960、CW 4962和CW 296),其中1296的输出功率最大。下面以L296为例,介绍大电流单片开关稳压电源的制作原理。 一、电路工作原理 L296的最大输出电流为4A(可扩展到10A),输出电压在5～40V范围内连续可调,输入电压
Monolithic integrated switching regulator known as the new energy-efficient energy-saving power supply, the power efficiency of up to 90%. Because it switches the power tube is also integrated in the chip, so not only excellent performance, but also simple peripheral circuits for the promotion of switching power supply and create the conditions. The typical products of monolithic integrated switching regulator are the L4960, L4962 and L296 from SGS (corresponding to the domestic models CW4960, CW4962 and CW296), of which the 1296 has the largest output power. The following to L296, for example, describes the production of high-current monolithic switching power supply. First, the circuit works L296 maximum output current of 4A (can be extended to 10A), the output voltage in the range of 5 ~ 40V continuously adjustable, the input voltage