UCD3138ARMHR

Overview

The UCD3138ARMHR is a highly integrated digital power controller from Texas Instruments, designed for isolated power applications. It features a 32-bit ARM7TDMI-S processor operating at 31.25MHz, paired with up to 16MHz error ADC and eight high-resolution DPWM outputs. The device supports three independent feedback loops with hardware-accelerated PID control. Key specifications include 64KB program flash, 4KB data RAM, and multiple communication interfaces including I2C/PMBus and UART. It operates within a temperature range of -40°C to +125°C and is housed in a 64-pin QFN package.

Feature Summary

• Integrates a 32-bit ARM7TDMI-S processor with dedicated hardware for digital loop control
• Supports up to three independent feedback loops with configurable control modes
• Features high-speed analog-to-digital conversion and precise digital pulse-width modulation
• Includes comprehensive communication interfaces for system monitoring and configuration

Applications

• Server and data center power supplies
• Telecommunications rectifiers
• High-power DC/DC converter modules
• Industrial power systems

Procurement Notes

Verify the specific suffix 'RMHR' against the manufacturer's current datasheet to confirm pinout compatibility and package dimensions. Ensure firmware binaries are compiled for the correct memory map associated with this variant. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process before procurement.

Selection Notes

Select this component when designing complex isolated converters requiring multi-loop regulation. It is suitable for applications demanding high switching frequencies and precise dynamic response. Consider the available flash memory size relative to your control algorithm complexity. Evaluate the need for external components versus the internal peripheral integration capabilities.

Part Context

This part belongs to the UCD3138 family of digital power controllers. The series is engineered to replace traditional analog control schemes in high-performance power stages. It provides a unified solution for managing voltage, current, and power constraints through programmable logic. The family includes variants with different memory sizes and package options to suit various design scales.

Replacement Considerations

Check for direct cross-references within the UCD3138 family based on memory capacity. Verify if alternative packages offer identical electrical characteristics. Ensure any substitute maintains compatibility with existing firmware architectures and thermal management designs.