SG3524N

Overview

The SG3524N is a monolithic integrated circuit designed for regulating power supplies, inverters, and switching regulators. It incorporates all necessary control circuitry on a single chip, supporting fixed-frequency pulse-width modulation techniques. The device features dual alternating outputs suitable for single-ended or push-pull applications. Key electrical parameters include an operating supply voltage range of 8V to 40V, a maximum switching frequency of 300 kHz, and a typical standby current of 8 mA. It provides a reference voltage with a maximum temperature variation of 1% and supports output currents up to 100 mA.

Feature Summary

• Integrates complete PWM power control circuitry including error amplifier, programmable oscillator, and shut-down circuitry.
• Features dual uncommitted output transistors allowing flexible single-ended or push-pull configurations.
• Includes high-gain comparator and current-limiting protection mechanisms.

Applications

• Transformer-coupled DC-to-DC converters
• Switching regulators of either polarity
• Inverter control systems

Procurement Notes

Verify the manufacturer designation on the component marking, as STMicroelectronics also produces this part number. Confirm the package type matches the required DIP-16 specification. Ensure the specific revision aligns with the intended application requirements before procurement.

Selection Notes

Select this component for applications requiring a comprehensive PWM controller solution. Consider the 300 kHz frequency limit and 40V input range when designing the power stage. Evaluate the need for push-pull versus single-ended topology based on the transformer configuration.

Part Context

The SG3524 belongs to a family of switching regulator controllers widely used in industrial and commercial power supplies. It serves as a standard solution for voltage-mode PWM control, offering a balance of performance and ease of implementation for various converter topologies.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.