LM5025ASD

DC DC Switching Controllers Overview

The LM5025ASD is an active clamp voltage mode PWM controller manufactured by Texas Instruments, formerly National Semiconductor. It supports a 100V forward converter topology with active clamp/reset techniques. Key electrical parameters include a switching frequency of 220 kHz, maximum duty cycle of 80%, and output drive current of 3 A. The device operates within a supply voltage range of 13 V to 90 V and provides programmable outputs between 8 V and 15 V. It features rise and fall times of 20 ns and 15 ns respectively, with a quiescent current of 4.2 mA. The component is housed in an LLP-16 package and functions within a temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Implements power converters utilizing the Active Clamp/Reset technique for efficient energy recovery.
• Provides voltage-mode control with dedicated high-current gate drivers for primary and secondary switches.
• Includes integrated shutdown functionality for system power management.

DC DC Switching Controllers Applications

• 100V Forward Converter implementations
• Active Clam / Reset power supply designs
• Industrial DC-DC conversion modules

DC DC Switching Controllers Procurement Notes

Verify that the specific part number matches the required package and suffix, as the LM5025ASD/NOPB indicates lead-free status. Confirm availability status carefully, as this component may be subject to obsolescence or end-of-life notices from the manufacturer. Ensure compatibility with existing board layouts due to the LLP-16 package dimensions. Cross-reference datasheet revisions to confirm pinout consistency if replacing older versions.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring a 100V input rating and active clamp reset topology. It is suitable for designs needing a fixed 220 kHz switching frequency and up to 80% duty cycle. Consider the LLP-16 package size for space-constrained PCBs. Verify that the 3 A output drive capability meets the gate charge requirements of the selected MOSFETs. Ensure the operating voltage range aligns with the system's bus voltage.

DC DC Switching Controllers Part Context

The LM5025ASD belongs to the LM5025A series of active clamp PWM controllers. Originally developed by National Semiconductor, it is now produced and supported by Texas Instruments following their acquisition. This family focuses on forward converter topologies, offering integrated features to simplify design compared to discrete solutions. The 'SD' suffix typically denotes the LLP-16 package variant.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include the LM5025ASD/NOPB for lead-free compliance. Other variants in the LM5025A series may offer different packages or temperature grades but share core functionality. Verify pin-to-pin compatibility before substitution.