UCD3138RJAT

Overview

The UCD3138RJAT is a highly integrated digital power controller from Texas Instruments, part of the UCD3138 series. It operates within an input voltage range of 3 V to 3.6 V and supports output voltages between 11.4 V and 12.6 V. The device features a maximum output current capability of 30 A and draws approximately 60 mA during operation. Designed for robust performance, it functions reliably across a temperature range of -40°C to +125°C. The component is housed in a VQFN-40 package suitable for surface mount installation.

Feature Summary

• Integrates a dedicated Error Analog-to-Digital Converter (EADC) for precise sampling of output voltage feedback signals.
• Includes a hardware-based PID compensator with configurable two-pole and two-zero placement for stable control loop dynamics.
• Features a Digital Pulse Width Modulator (DPWM) providing high-resolution pulse width control for accurate switching regulation.
• Supports Single Frame functionality to detect input voltage conditions directly from the secondary side without external isolation components.

Applications

• Isolated DC/DC converter modules
• AC/DC power supply systems
• Power Factor Correction (PFC) circuits

Procurement Notes

Verify the specific suffix 'RJAT' against the manufacturer's official datasheet to confirm the exact package type and tape-and-reel specifications. Ensure that the selected variant meets the required thermal and electrical constraints for the target application environment before finalizing procurement decisions.

Selection Notes

Select this component when a fully programmable digital solution is required for isolated power architectures. The UCD3138RJAT offers flexibility through its ARM7TDMI-S core and Fusion Digital Power Peripherals, allowing for customized control algorithms. Consider the VQFN-40 package dimensions and thermal dissipation requirements during the PCB layout phase to ensure optimal performance.

Part Context

This device belongs to the UCD3138 family of digital power controllers designed to reduce component count in IT and network infrastructure applications. It replaces traditional analog PWM controllers by integrating microcontroller capabilities with specialized power management peripherals, enabling advanced features like dynamic compensation and communication interfaces.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing firmware and hardware designs if considering alternative devices from the same or different manufacturers.