Overview
The UCD3138ARMHR, produced by Texas Instruments, is a highly integrated digital controller designed for isolated power applications. This controller offers superior levels of integration and performance, making it suitable for a wide variety of power conversion applications. At its core, the UCD3138ARMHR features a fully programmable 31.25 MHz, 32-bit ARM7TDMI-S™ processor, which enables real-time monitoring, peripheral configuration, and communication management. The device is supported by TI’s Fusion Digital Power Studio GUI, which simplifies configuration and monitoring of key system parameters.
Key Specifications
| Parameter | Description |
|---|---|
| Processor | Fully programmable 31.25 MHz, 32-bit ARM7TDMI-S™ processor |
| Memory | 32 KB of Program Flash, 2 KB of Data Flash with ECC, 4 KB of Data RAM, 4 KB of Boot ROM |
| ADC | 14-Channel, 12-Bit, 267-ksps General-Purpose ADC with Integrated Programmable Averaging Filters and Dual Sample and Hold |
| DPWM Outputs | Up to 8 DPWM outputs with 250-ps pulse width resolution |
| Feedback Loops | Digital control of up to 3 independent feedback loops |
| Communication Peripherals | PMBus, I2C, 1-2 UARTs depending on package type |
| Package | 40-Pin QFN (WFQFN) |
| Operating Temperature | –40°C to 125°C |
| Timers and Watchdog | Timer Capture with Selectable Input Pins, Up to 5 Additional General Purpose Timers, Built-In Watchdog: BOD and POR |
Key Features
- Dedicated PID-Based 2-pole/2-zero digital compensator and DPWM outputs
- Internal Temperature Sensor
- Feature Rich Fault Protection Options including 7 High-Speed Analog Comparators, Cycle-by-Cycle Current Limiting, Programmable Fault Counting, and External Fault Inputs
- Current Share Bus Support, Analog Average, Master and Slave configurations
- Flux and Phase Current Balancing for Nonpeak Current Mode Control Applications
- Primary Side Voltage Sensing and Copper Trace Current Sensing
- Synchronization of DPWM Waveforms Between Multiple UCD3138 family devices
- Fusion Digital Power Studio GUI Support for easy configuration and monitoring
Applications
- Power Supplies and Telecom Rectifiers
- Power Factor Correction
- Isolated DC-DC Modules
- IT and Network Infrastructure Power Solutions
Q & A
- What is the primary function of the UCD3138ARMHR?
The UCD3138ARMHR is a highly integrated digital controller designed for isolated power applications, providing digital control over power conversion processes.
- What type of processor does the UCD3138ARMHR use?
The UCD3138ARMHR uses a fully programmable 31.25 MHz, 32-bit ARM7TDMI-S™ processor.
- How many DPWM outputs does the UCD3138ARMHR have?
The UCD3138ARMHR has up to 8 DPWM outputs with 250-ps pulse width resolution.
- What is the resolution of the general-purpose ADC in the UCD3138ARMHR?
The general-purpose ADC has a resolution of 12 bits and a sampling rate of 267 ksps.
- What communication peripherals are available on the UCD3138ARMHR?
The device includes PMBus, I2C, and 1-2 UARTs depending on the package type.
- What are the operating temperature ranges for the UCD3138ARMHR?
The operating temperature range is from –40°C to 125°C.
- Does the UCD3138ARMHR support fault protection features?
Yes, it includes feature-rich fault protection options such as cycle-by-cycle current limiting, programmable fault counting, and external fault inputs.
- Can the UCD3138ARMHR be used in multiple feedback loop applications?
Yes, it supports digital control of up to 3 independent feedback loops.
- What development tools are available for the UCD3138ARMHR?
Texas Instruments provides tools such as the Fusion Digital Power Studio GUI and Code Composer Studio™ for development and configuration.
- What package types are available for the UCD3138ARMHR?
The UCD3138ARMHR is available in a 40-Pin QFN (WFQFN) package.
