UC3845AN

Power Supply Controllers, Monitors Overview

The UC3845AN is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance switch-mode power supplies. It operates within a supply voltage range up to 30 V and supports switching frequencies of 500 kHz with a maximum duty cycle of 50%. The device features a single output capable of delivering 1 A drive current. It is housed in an 8-pin PDIP package suitable for through-hole mounting. The operational temperature range spans from 0 °C to +70 °C, ensuring reliability in commercial applications.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode control architecture for rapid transient response and simplified loop compensation
• Supports versatile topologies including Boost, Buck, Flyback, and Forward configurations
• Integrates a dedicated oscillator for precise frequency setting at 500 kHz
• Provides robust gate drive capability with 1 A peak output current

Power Supply Controllers, Monitors Applications

• Flyback converter designs for isolated power supplies
• Forward converter implementations requiring moderate power levels
• Buck and Boost non-isolated DC-DC conversion stages
• General-purpose switch-mode power supply controllers

Power Supply Controllers, Monitors Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature grade. Ensure the procurement channel provides original manufacturer documentation or traceability records. Confirm RoHS compliance status if required by regulatory standards. Check for any recent product change notices that may affect pinout or electrical characteristics. Validate that the received components match the specified PDIP-8 through-hole package.

Power Supply Controllers, Monitors Selection Notes

Select this component when a current-mode controller is required for standard commercial temperature ranges. It is suitable for applications needing a 500 kHz switching frequency and 1 A output drive. Consider the PDIP-8 package for prototyping or through-hole manufacturing processes. Evaluate thermal management requirements given the 0 °C to +70 °C operating limit. Compare against UC2845AN if extended industrial temperature range is necessary.

Power Supply Controllers, Monitors Part Context

The UC3845AN belongs to the UC3845 series of current-mode PWM controllers from Texas Instruments. This series is widely used in offline and DC-DC converter applications. The 'A' suffix typically denotes the commercial temperature grade variant. It shares functional similarities with other members of the UC384x family but differs in package and temperature specifications.

Power Supply Controllers, Monitors Replacement Considerations

• UC3845N
• UC3845D
• TL3845P

Power Supply Controllers, Monitors FAQ

What is the maximum duty cycle for the UC3845AN?

The maximum duty cycle is limited to 50%.

Which packaging style does the UC3845AN use?

It uses an 8-pin PDIP (Plastic Dual In-line Package) for through-hole installation.

Can the UC3845AN support Flyback topology?

Yes, it supports Boost, Buck, Flyback, and Forward topologies.