UC2825N/80709

DC DC Switching Controllers Overview

The UC2825N/80709 is a high-speed PWM controller manufactured by Unitrode, designed for versatile DC-DC switching applications. It supports multiple topologies including boost, flyback, forward, half-bridge, and push-pull configurations. The device features two outputs with a maximum duty cycle of 50 percent and operates at a switching frequency of 1 MHz. It provides an output voltage of 5.1 V and can source up to 2 A. The component functions within a temperature range of -40°C to +85°C and is available in a PDIP-16 through-hole package.

DC DC Switching Controllers Feature Summary

• Supports multiple converter topologies including boost, flyback, forward, half-bridge, and push-pull
• Integrates current limit, enable, frequency control, ramp, and soft start capabilities
• Features high-speed operation with specified rise and fall times

DC DC Switching Controllers Applications

• Boost converters
• Flyback converters
• Forward converters
• Half-bridge converters
• Push-pull converters

DC DC Switching Controllers Procurement Notes

Verify the manufacturer designation, as the part number references both Unitrode and Texas Instruments due to historical acquisitions. Confirm the specific suffix or revision level matches your design requirements. Ensure the PDIP-16 through-hole package aligns with your PCB layout. Check RoHS compliance status if required for your manufacturing process. Validate the operating temperature range against your environmental conditions.

DC DC Switching Controllers Selection Notes

Select this controller for designs requiring support for various isolated and non-isolated topologies. The 1 MHz switching frequency allows for compact magnetic component sizing. Ensure the input voltage range accommodates your supply rails, typically between 10 V and 30 V. The dual output capability suits applications needing synchronized drive signals. Verify that the 50 percent maximum duty cycle meets your transformer turns ratio requirements.

DC DC Switching Controllers Part Context

The UC2825 series originates from Unitrode, which was later acquired by Texas Instruments. The UC2825N variant is a commercial grade version housed in a standard plastic DIP package. The /80709 suffix often denotes specific distributor or legacy catalog identifiers. This component belongs to the broader family of high-speed PWM controllers used in power management systems.

DC DC Switching Controllers Replacement Considerations

The UC2825BN is a documented alternative within the same product family. Both share similar functional characteristics but may differ in specific electrical tolerances or temperature grades. Verify pin compatibility and parameter alignment before substitution.