CA3524F

524 CA2 October 2000 NO IS A T DUC PRO LE BSO TE CA1524, CA2524 CA3524 Regulating Pulse Width Modulator Description The CA1524 and CA3524 are silicon monolithic integrated circuits designed to provide all the control circuitry for use in a broad range of switching regulator circuits. The CA1524 and CA3524 have all the features of the industry types SG1524, SG2524, and SG3524, respectively. A block diagram of the CA1524 series is shown in Figure 1. The circuit includes a zener voltage reference, transconductance error amplifier, precision R-C oscillator, pulse-width modulator, pulse-steering flip-flop, dual alternating output switches, and current-limiting and shutdown circuitry. This device can be used for switching regulators of either polarity, transformer-coupled dc-dc converter, transformerless voltage doublers, dc-ac power inverters, highly efficient variable power supplies, and polarity converter, as well as other power-control applications. Features Complete PWM Power Control Circuitry Separate Outputs for Single-Ended or Push-Pull Operation Line and Load Regulation . . . . . . . . . . . . . . . 0.2% (Typ) Internal Reference Supply with 1% (Max) Oscillator and Reference Voltage Variation Over Full Temperature Range Standby Current of Less Than 10mA Frequency of Operation Beyond 100kHz Variable-Output Dead Time of 0.5µs to 5µs Low VCE(sat) Over the Temperature Range Applications Positive and Negative Regulated Supplies Dual-Output Regulators Flyb...