Overview
The UCD3138RJAR, produced by Texas Instruments, is a highly integrated digital controller designed for isolated power applications. This controller offers superior levels of integration and performance in a single-chip solution, making it suitable for a wide variety of power conversion applications. The UCD3138RJAR is particularly optimized for enhancing the performance of AC-DC and isolated DC-DC applications, reducing the component count in IT and network infrastructure spaces. It is a fully programmable solution, providing customers with complete control over their application and the ability to differentiate their solution. Texas Instruments supports this controller with best-in-class development tools, including application firmware, Code Composer Studio™ software development environment, and TI’s power development GUI.
Key Specifications
| Specification | Details |
|---|---|
| Processor | Fully Programmable High-Performance 31.25 MHz, 32-Bit ARM7TDMI-S™ Processor |
| Memory | 32KB of Program Flash, 2KB of Data Flash with ECC, 4KB of Data RAM, 4KB 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 | 8 High Resolution DPWM Outputs with 250-ps Pulse Width Resolution |
| Feedback Loops | Digital Control of up to 3 Independent Feedback Loops with PID-Based Hardware |
| Communication Peripherals | I2C/PMBus, 2 UARTs on UCD3138RGC (64-Pin QFN), 1 UART on UCD3138RHA/UCD3138RMH (40-Pin QFN) and UCD3138RJA (40-Pin VQFN) |
| Timers and Watchdog | Timer Capture with Selectable Input Pins, Up to 5 Additional General Purpose Timers, Built-In Watchdog: BOD and POR |
| Operating Temperature | –40°C to 125°C |
| Packages | 64-Pin QFN and 40-Pin QFN |
Key Features
- Dedicated Error Analog-to-Digital Converter (EADC) and PID-Based 2-Pole/2-Zero Digital Compensator
- Flux and Phase Current Balancing for Nonpeak Current Mode Control Applications
- Current Share Bus Support, Analog Average, Master and Slave
- Feature Rich Fault Protection Options: 7 High-Speed Analog Comparators, Cycle-by-Cycle Current Limiting, Programmable Fault Counting, External Fault Inputs, 10 Digital Comparators
- Synchronization of DPWM Waveforms Between Multiple UCD3138 Family Devices
- Internal Temperature Sensor
- Fusion Digital Power Studio GUI Support
- Soft Start/Stop with and without Prebias, Fast Input Voltage Feed Forward Hardware, Primary Side Voltage Sensing, Copper Trace Current Sensing
Applications
- Power Supplies
- Telecom Rectifiers
- Power Factor Correction
- Isolated DC-DC Modules
- IT and Network Infrastructure
Q & A
- What is the UCD3138RJAR?
The UCD3138RJAR is a highly integrated digital controller for isolated power applications produced by Texas Instruments.
- What processor does the UCD3138RJAR use?
The UCD3138RJAR uses a fully programmable high-performance 31.25 MHz, 32-Bit ARM7TDMI-S™ Processor.
- How many DPWM outputs does the UCD3138RJAR have?
The UCD3138RJAR has 8 high resolution DPWM outputs with 250-ps pulse width resolution.
- What is the operating temperature range of the UCD3138RJAR?
The operating temperature range is –40°C to 125°C.
- What communication peripherals are available on the UCD3138RJAR?
The device includes I2C/PMBus and UARTs (2 on 64-Pin QFN, 1 on 40-Pin QFN and VQFN packages).
- Does the UCD3138RJAR support synchronization of DPWM waveforms?
Yes, it supports synchronization of DPWM waveforms between multiple UCD3138 family devices.
- What are the key features of the fault protection options in the UCD3138RJAR?
The device includes 7 high-speed analog comparators, cycle-by-cycle current limiting, programmable fault counting, external fault inputs, and 10 digital comparators.
- What development tools are available for the UCD3138RJAR?
Texas Instruments provides application firmware, Code Composer Studio™ software development environment, and TI’s power development GUI.
- What types of applications is the UCD3138RJAR suitable for?
The UCD3138RJAR is suitable for power supplies, telecom rectifiers, power factor correction, isolated DC-DC modules, and IT and network infrastructure.
- Does the UCD3138RJAR have internal memory?
Yes, it includes 32KB of program flash, 2KB of data flash with ECC, and 4KB of data RAM.
