UCD3138RHAT

Overview

The UCD3138RHAT is a highly integrated digital power controller from Texas Instruments, designed for isolated power applications. It features a 32-bit ARM7TDMI-S RISC microcontroller core and Fusion Digital Power Peripherals (FDPP). Key specifications include a WQFN-40 package, operating voltage range of 3 V to 3.6 V, and an operating temperature range of -40°C to +125°C. The device integrates Error ADCs, PID compensators, and DPWM outputs with 250 ps resolution.

Feature Summary

• Integrates dedicated Error Analog-to-Digital Converters (EADC) for high-speed sampling
• Includes hardware-based PID compensator with configurable two-pole/two-zero architecture
• Features Digital Pulse Width Modulation (DPWM) with 250 ps pulse width resolution
• Supports Single Frame functionality for input voltage detection without optocouplers

Applications

• Isolated DC/DC modules
• AC/DC converters
• Power Factor Correction (PFC)
• Telecom rectifiers

Procurement Notes

Verify the specific suffix RHAT against the official datasheet to confirm package type and tape/reel configuration. Confirm current lifecycle status as NRND (Not Recommended for New Designs) before finalizing procurement plans. Ensure compatibility with existing PCB footprints for the WQFN-40 package.

Selection Notes

Select this component for designs requiring precise digital control loops in isolated topologies. The integration of EADC and DPWM reduces external component count compared to analog solutions. Consider the NRND status when planning long-term production runs.

Part Context

This part belongs to the UCD3138 family of digital power controllers. It utilizes the Fusion Digital Power technology to provide flexible control algorithms. The device is optimized for IT and network infrastructure power supplies, offering superior integration levels compared to previous generations like the UC30xx series.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.