SG3526BN

DC DC Switching Controllers Overview

The SG3526BN is a regulating pulse width modulator manufactured by Microchip Technology, designed for voltage mode control in switching power supply applications. It operates within an input voltage range of 8 V to 35 V and draws a typical operating supply current of 18 mA. The device supports multiple topologies including Buck, Flyback, and Forward configurations. It features two outputs with a maximum duty cycle of 49% and a switching frequency capability up to 500 kHz. Electrical characteristics include a rise time of 300 ns and a fall time of 100 ns. The component is housed in a PDIP-18 package suitable for through-hole mounting and functions within a temperature range of 0°C to +70°C.

DC DC Switching Controllers Feature Summary

• Voltage mode PWM control architecture for precise regulation
• Integrated shutdown pin for external fault protection or remote control
• Dual output configuration supporting push-pull, half-bridge, and full-bridge topologies
• Built-in dead-time control to prevent bridge arm short circuits

DC DC Switching Controllers Applications

• Offline AC-DC switching power supplies
• DC-DC converters utilizing buck, boost, flyback, or forward topologies
• Uninterruptible Power Supply (UPS) systems
• DC-AC inverters

DC DC Switching Controllers Procurement Notes

Verify the specific manufacturer source, as SG3526BN has been produced by multiple entities including Microchip, Microsemi, and Linfinity. Confirm that the PDIP-18 package matches your board layout requirements. Ensure the voltage mode control specification aligns with your feedback loop design. Check RoHS compliance status if environmental regulations apply to your production. Validate the operating temperature range against your system's thermal environment.

DC DC Switching Controllers Selection Notes

Select this component when voltage mode control is required for high-reliability isolated switching regulators. The dual-output capability makes it suitable for bridge and push-pull converter designs. Consider the 500 kHz maximum switching frequency for balancing efficiency and component size. The integrated shutdown feature simplifies over-current and fault protection circuitry. Ensure the 8 V to 35 V input range covers your application's minimum and maximum supply voltages.

DC DC Switching Controllers Part Context

The SG3526BN belongs to the SG3526B series of switching controllers. It is a legacy component originally developed for military and aerospace applications due to its high reliability. The part is functionally similar to other industry-standard PWM controllers but is distinguished by its specific bipolar process technology and packaging options offered by various manufacturers.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with UC3526AN or MC3526N only if datasheet electrical parameters and pinouts are verified to be identical.