UCD3138ARGCR

Overview

The UCD3138ARGCR is a fully programmable digital power controller from Texas Instruments, designed for high-performance AC/DC and isolated DC/DC applications. It integrates a 32-bit ARM7TDMI-S core with Fusion Digital Power Peripherals (FDPP), featuring a dedicated Error ADC (EADC) and a 2-pole/2-zero PID compensator. The device supports up to three independent feedback loops with configurable resolution down to 1mV/LSB and includes a 14-bit effective DAC. Operating voltage ranges from 3V to 3.6V, with an operating temperature range of -40°C to +125°C in a VQFN-64 package.

Feature Summary

• Integrates a 32-bit ARM7TDMI-S processor with specialized digital control peripherals for precise loop management
• Features a high-speed Error Analog-to-Digital Converter (EADC) with automatic resolution selection and up to 8x oversampling
• Includes a hardware-based 2-pole/2-zero digital compensator (PIDc) for stable and flexible control loop implementation
• Supports advanced digital power features such as Single Frame input voltage detection and input voltage feedforward

Applications

• AC/DC converters for IT and network infrastructure
• Isolated DC/DC modules for server power supplies
• Power factor correction (PFC) circuits
• Communication rectifiers requiring multi-loop control

Procurement Notes

Verify the specific suffix 'RGCR' against the manufacturer's official datasheet to confirm tape-and-reel packaging and moisture sensitivity level. Ensure the ordering part number matches the exact pinout and thermal pad configuration required by your PCB layout. Cross-reference the component marking code with the latest production data to avoid counterfeit risks.

Selection Notes

Select this component when designing systems requiring multiple independent feedback loops or complex digital compensation strategies. It is suitable for applications needing high-resolution voltage sensing and fast transient response. Consider the available development tools, such as Fusion Digital Power Designer, to simplify the configuration of PMBus commands and loop parameters during the design phase.

Part Context

This device belongs to the UCD3138 family of digital power controllers, representing a significant evolution from previous generations like the UCD30xx series. It offers superior integration by combining microcontroller capabilities with dedicated analog-digital hybrid peripherals. The family is optimized for reducing solution component count while enhancing performance in demanding power conversion environments.

Replacement Considerations

Public confirmed substitute part numbers: UCD3138RGCT, UCD3138ARJAT, UCD3138RHAR, UCD3138RMHR.