UC3825Q-TI

DC DC Switching Controllers Overview

The UC3825Q is a high-speed current-mode PWM controller manufactured by Texas Instruments. It supports multiple power converter topologies including boost, flyback, forward, half-bridge, full-bridge, and push-pull configurations. The device features dual outputs for driving power switches and operates within a supply voltage range of 8.4V to 30V. It is housed in a 20-pin PLCC package with J-leads. The component is designed for applications requiring precise frequency control and robust protection mechanisms.

DC DC Switching Controllers Feature Summary

• Implements current-mode control architecture for fast load transient response and inherent cycle-by-cycle current limiting.
• Features dual independent push-pull output drivers capable of directly powering MOSFET or IGBT gates.
• Includes leading edge blanking to suppress turn-on noise spikes and prevent false triggering during current sensing.

DC DC Switching Controllers Applications

• High-frequency DC-DC switching power supplies
• Flyback and forward converter designs
• Push-pull and half-bridge power stages

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm package type and pinout configuration. Ensure that any ordering suffixes do not alter the functional specifications or electrical characteristics defined in the datasheet. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability before procurement.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring high-speed operation and flexible topology support. Evaluate the thermal performance within the specified operating temperature range. Confirm that the external timing components align with the desired switching frequency requirements. Ensure the drive capability matches the gate charge requirements of the selected power switches.

DC DC Switching Controllers Part Context

This part belongs to the UC1825/UC2825/UC3825 family of current-mode PWM controllers. These devices are widely used in industrial and commercial power conversion systems. The UC3825 variant specifically targets higher frequency applications compared to its lower-bandwidth counterparts, offering improved dynamic response and efficiency in compact power modules.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitutes include UC3825DWTR and UC3825DW. Verify compatibility regarding package dimensions and pin assignments when transitioning from the discontinued UC3825Q.