UC3872N

Overview

The UC3872N is a phase-shift resonant PWM controller manufactured by Texas Instruments, designed for high-frequency power conversion applications. It features a 20-pin PDIP package and supports through-hole mounting. The device operates within a supply voltage range of 11 V to 20 V and delivers up to four output channels with a maximum output current of 2 A per channel. It supports switching frequencies up to 1 MHz and offers a maximum duty cycle of 100%. The operational temperature range spans from 0°C to +70°C, with a typical quiescent current of 30 mA.

Feature Summary

• Supports phase-shift resonant topology for efficient zero-voltage switching
• Provides four independent output channels for multi-phase or bridge configurations
• Enables full duty cycle control for flexible power regulation
• Integrates high-current drive capability for direct gate driving

Applications

• Phase-shifted full-bridge DC-DC converters
• High-frequency resonant power supplies
• Server and workstation power management systems
• Industrial power conversion modules

Procurement Notes

Verify the specific suffix (e.g., N) against the official datasheet to confirm pinout and electrical characteristics. Ensure the procurement source provides valid RoHS compliance documentation. Confirm that the supplier is an authorized distributor to guarantee component authenticity and traceability. Check for any recent product change notifications regarding manufacturing location or material composition updates.

Selection Notes

Select this component when designing phase-shift resonant converters requiring four-channel synchronization. Compare it against alternatives like the UC3876 if different packaging or specific frequency ranges are needed. Consider thermal management requirements due to the 1 MHz switching capability. Evaluate the need for external components to set the operating frequency and duty cycle limits according to the application's power density constraints.

Part Context

The UC3872 belongs to the UC series of PWM controllers from Texas Instruments, specializing in advanced resonant topologies. It complements other devices in the family such as the UC3875 and UC3876, offering distinct packaging options and drive capabilities. This part is part of the broader portfolio aimed at improving efficiency in high-power density applications through soft-switching techniques.

Replacement Considerations

The UC3872DWG4 is a surface-mount equivalent in the same family. Verify compatibility with existing PCB layouts if transitioning from through-hole to SMD. Cross-reference with UC3876 for similar functionality but different package types.