UCD3138ARJAR

Overview

The UCD3138ARJAR is a highly integrated digital power controller from Texas Instruments, designed for isolated power applications. It features a fully programmable architecture based on a 32-bit ARM7TDMI-S core. The device integrates multiple Fusion Digital Power Peripherals (FDPP), each containing an Error Analog-to-Digital Converter (EADC), a 2-pole/2-zero digital compensator, and a Digital Pulse Width Modulator (DPWM) with 250 ps resolution. It supports up to three independent control loops. Key specifications include a supply voltage range of 3 V to 3.6 V, operating temperatures from -40°C to +125°C, and communication interfaces including PMBus, I2C, SPI, and UART.

Feature Summary

• Integrates dedicated hardware-based PIDa loop compensation with 2-pole/2-zero configuration for precise digital control.

Applications

• AC/DC power supplies
• Isolated DC/DC converters
• Power factor correction circuits

Procurement Notes

Verify the specific suffix ARJAR against official datasheets to confirm package type and tape/reel specifications. Confirm lifecycle status as NRND (Not Recommended for New Designs) impacts long-term availability. Ensure compatibility with required firmware tools such as Code Composer Studio or Fusion Digital Power Designer.

Selection Notes

Select this component when high integration and flexible digital control are required for isolated power topologies. Consider the available development tools and firmware support for implementation. Evaluate the need for multiple independent feedback loops and the benefits of integrated peripherals over discrete analog solutions.

Part Context

This part belongs to the UCD3138A series of digital power controllers. It represents a generation of devices optimized for reducing component count in IT and network infrastructure power solutions. The series offers superior integration compared to previous generations like the UC30xx family.

Replacement Considerations

Public confirmed substitute part numbers: UCD3138ARMHT, UCD3138ARJAT.