The CA1524 and CA3524 are silicon monolithic integratedcircuits designed to provide all the control circuitry for use ina broad range of switching regulator circuits.The CA1524 and CA3524 have all the features of the industrytypes SG1524, SG2524, and SG3524, respectively. Ablock diagram of the CA1524 series is shown in Figure 1.The circuit includes a zener voltage reference, transconductanceerror amplifier, precision R-C oscillator, pulse-widthmodulator, pulse-steering flip-flop, dual alternating outputswitches, and current-limiting and shutdown circuitry. Thisdevice can be used for switching regulators of either polarity,transformer-coupled dc-dc converter, transformerless voltagedoublers, dc-ac power inverters, highly efficient variablepower supplies, and polarity converter, as well as otherpower-control applications.
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