SG3524J

Overview

The SG3524J is a voltage mode PWM controller designed for regulating power supplies, inverters, and switching regulators. It integrates an on-chip reference, error amplifier, programmable oscillator, pulse-steering flip-flop, two uncommitted output transistors, a high-gain comparator, and current-limiting circuitry. The device supports switching frequencies from 100 Hz to 300 kHz with a maximum duty cycle of 49%. It features dual alternating outputs suitable for single-ended or push-pull applications and includes shutdown functionality.

Feature Summary

• Integrates complete PWM power control circuitry including error amplifier and programmable oscillator
• Provides dual alternating outputs enabling flexible single-ended or push-pull configurations
• Includes built-in current-limiting and shut-down circuitry for enhanced protection

Applications

• Regulating power supplies
• Inverters
• Switching regulators
• Transformer-coupled DC-to-DC converters

Procurement Notes

Verify the manufacturer designation carefully, as the SG3524 family has been produced by multiple vendors including Texas Instruments, STMicroelectronics, and Linear Technology. Confirm that the specific 'J' suffix corresponds to the required temperature range and package type for your design. Ensure the component source matches the intended application reliability standards before procurement.

Selection Notes

Select this component for applications requiring fixed-frequency pulse-width modulation techniques. It is suitable for transformerless voltage doublers and polarity converter applications. The device supports operation up to 300 kHz and offers low standby current. Consider the dual output capability when designing single-ended or push-pull topologies requiring integrated control logic.

Part Context

The SG3524 belongs to a family of monolithic chips designed for constructing regulating power supplies and inverters. It serves as a control element for high power-output applications using fixed-frequency PWM techniques. The family is engineered for switching regulators of either polarity and includes essential functions like reference generation and error amplification on a single chip.

Replacement Considerations

Compatible substitutes include SG3524 variants from Texas Instruments, STMicroelectronics, and Linear Technology. Verify pinout compatibility and electrical specifications such as frequency range and output current capabilities before substitution.

FAQ

What is the maximum operating frequency of the SG3524J?

The SG3524J supports switching frequencies up to 300 kHz.

Can the SG3524J be used in push-pull applications?

Yes, the device features dual alternating outputs that allow for both single-ended and push-pull applications.