SG3524BJ

Overview

The SG3524BJ is a voltage-mode PWM controller manufactured by Microsemi Corporation, housed in a CDIP-16 package. It integrates complete power control circuitry for regulating power supplies, inverters, and switching regulators. The device features dual alternating outputs suitable for single-ended or push-pull applications, an on-chip reference with 1% maximum temperature variation, and operation up to 300KHz. It includes current-limiting and shut-down circuitry with a typical standby current of 8mA.

Feature Summary

• Integrates complete PWM power control circuitry including error amplifier, programmable oscillator, and pulse-steering flip-flop.
• Provides dual alternating outputs capable of supporting both single-ended and push-pull topologies.
• Includes built-in current-limiting and shut-down circuitry for enhanced protection.

Applications

• Regulating power supplies
• Inverters
• Switching regulators

Procurement Notes

Verify the manufacturer designation as Microsemi Corporation when sourcing the SG3524BJ variant. Confirm the CDIP-16 package type matches your board layout requirements. Ensure compatibility with the specific voltage-mode PWM application needs, noting that this component serves as a control element rather than a power switch itself.

Selection Notes

Select the SG3524BJ for applications requiring fixed-frequency pulse-width modulation techniques. Its design supports transformer-coupled DC-to-DC converters and polarity converters. Consider the dual alternating output capability if push-pull configurations are necessary. The integrated reference and error amplifier simplify the design process for high-power-output applications.

Part Context

The SG3524 family was originally designed for switching regulators of either polarity. While widely produced by various manufacturers like TI, the SG3524BJ specifically denotes the version from Microsemi Corporation. It belongs to the category of monolithic integrated circuits dedicated to power management and control functions in electronic systems.

Replacement Considerations

Compatible alternatives include the SG3524NG4 (TI) and SG3524P. Verify pinout compatibility and package differences, such as PDIP versus CDIP, before substitution. Ensure electrical parameters like operating frequency and output drive capabilities remain consistent with the original design specifications.