UCD3138128APFC

Power Supply Controllers, Monitors Overview

The UCD3138128APFC is a highly integrated digital power controller from Texas Instruments, part of the UCD3138A family. It features a 32-bit ARM7TDMI-S processor and 128kB of program flash memory organized in banks to support dual-image firmware updates without power interruption. The device includes up to eight high-resolution Digital Pulse Width Modulated (DPWM) outputs with 250ps pulse width resolution and supports switching frequencies up to 2MHz. It integrates an Error ADC with up to 16 MSPS sampling rate and configurable resolution down to 1mV/LSB. Operating on a 3V to 3.6V supply, it functions within a temperature range of -40°C to +125°C and is housed in a TQFP-80 package.

Power Supply Controllers, Monitors Feature Summary

• Supports execution from one flash bank while programming another, enabling 'on-the-fly' firmware updates without shutting down the power supply.
• Provides digital control for up to three independent feedback loops using dedicated PID-based hardware with configurable non-linear control.
• Integrates additional communication ports compared to the base UCD3138, including extra SPI and I2C interfaces.
• Features cycle-by-cycle duty cycle matching and adjustable phase shift and dead-bands for precise power management.

Power Supply Controllers, Monitors Applications

• Server power supplies
• Telecommunications rectifiers
• High-power DC/DC modules
• Industrial power systems

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix APFC against the official datasheet to confirm pinout and electrical characteristics match the design requirements. Confirm the component status as active or recommended for new designs before finalizing procurement plans. Ensure compatibility with the required TQFP-80 packaging and soldering profiles during assembly.

Power Supply Controllers, Monitors Selection Notes

Select this model when 128kB of program flash is required for complex control algorithms or dual-image booting capabilities. Choose this variant over lower-flash derivatives if multiple independent feedback loops or enhanced communication interfaces are necessary. Ensure the application environment stays within the specified -40°C to +125°C operating temperature range.

Power Supply Controllers, Monitors Part Context

This component belongs to the UCD3138x series of highly integrated digital controllers designed for single-chip power management solutions. It serves as an evolution of the UCD3138 family, offering increased memory capacity and expanded communication options. The series targets applications demanding high performance and flexibility in digital power conversion architectures.

Power Supply Controllers, Monitors Replacement Considerations

UCD3138128PFC is a documented alternative within the same series featuring identical core specifications but packaged in a standard tray rather than reel/cut tape formats.