UCD3138RJAR

Overview

The UCD3138RJAR 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 RISC microcontroller core. The device integrates Fusion Digital Power Peripherals (FDPP), including a dedicated Error Analog-to-Digital Converter (EADC) and a hardware-based PID compensator with two poles and two zeros. It supports up to three independent feedback loops and includes a high-speed DPWM with 250 ps pulse width resolution. The component operates within an input voltage range of 3 V to 3.6 V and functions across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a 32-bit ARM7TDMI-S processor with specialized digital control peripherals for precise regulation
• Supports multiple independent feedback loops via dedicated error ADCs and configurable digital compensators
• Features high-resolution digital pulse-width modulation for accurate switching control

Applications

• Isolated DC/DC converter modules
• AC/DC rectifiers in network infrastructure
• Power factor correction circuits

Procurement Notes

Verify the specific suffix 'RJAR' against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with required firmware libraries and development tools such as Fusion Digital Power Designer. Confirm that the ordering quantity aligns with standard reel sizes provided by authorized distributors.

Selection Notes

Select this component when designing systems requiring flexible digital control over isolated power stages. It is suitable for applications needing multi-loop regulation and advanced protection features like Single Frame input voltage detection. Consider the integration level to reduce external component count compared to analog counterparts.

Part Context

This part belongs to the UCD3138 family of digital power controllers. The series is characterized by its ability to replace complex analog designs with programmable digital solutions. It targets high-performance power conversion needs in IT and communication equipment where efficiency and adaptability are critical.

Replacement Considerations

Check for updated revisions such as UCD3138RHAR or variants with different memory configurations like UCD3138064A. Verify pinout compatibility and software migration requirements before substituting.