Overview
The UCD3138128APFCR is a highly integrated digital controller for isolated power applications, manufactured by Texas Instruments. This device is part of the UCD3138 family and is specifically designed for power factor correction (PFC) and other high-performance power conversion applications. It features a 32-bit ARM7TDMI-S RISC microcontroller, which enables real-time monitoring, configuration of peripherals, and execution of complex control algorithms. The UCD3138128APFCR is packaged in an 80-pin TQFP (PFC) package, making it suitable for a wide range of power supply and telecom rectifier applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Package Type | 80-pin TQFP (PFC) |
| Processor Core | 32-bit ARM7TDMI-S RISC microcontroller, 31.25 MHz |
| Memory | 32 KB Program Flash, 2 KB Data Flash with ECC, 4 KB Data RAM, 4 KB Boot ROM |
| DPWM Outputs | Up to 8 high resolution DPWM outputs, 250-ps pulse width resolution, up to 2 MHz switching frequency |
| Feedback Loops | Up to 3 independent feedback loops with dedicated PID-based hardware and 2-pole/2-zero configurable compensators |
| ADC | 14-channel, 12-bit, 267 ksps general-purpose ADC with integrated programmable averaging filters and dual sample and hold |
| Operating Temperature | -40°C to 125°C |
| Communication Peripherals | I2C/PMBus, UARTs |
| Timers | 4 (16-bit) and 1 (24-bit) timers |
| Fault Protection | 7 high-speed analog comparators, cycle-by-cycle current limiting, programmable fault counting, external fault inputs |
Key Features
- Digital control of up to 3 independent feedback loops with dedicated PID-based hardware and 2-pole/2-zero configurable compensators.
- Up to 16 MHz Error Analog-to-Digital Converter (EADC) with configurable resolution, automatic resolution selection, and up to 8x oversampling.
- High resolution Digital Pulse Width Modulated (DPWM) outputs with 250-ps pulse width resolution and up to 2 MHz switching frequency.
- Configurable feedback control including voltage mode, average current mode, peak current mode, constant current, and constant power.
- Fast, automatic, and smooth mode switching between frequency modulation, phase shift modulation, and PWM.
- High efficiency and light load management features such as burst mode, ideal diode emulation, and synchronous rectifier soft on/off.
- Soft start/stop with and without prebias, fast input voltage feed forward hardware, and primary side voltage sensing.
- Current share bus support with analog average, master, and slave configurations.
- Feature-rich fault protection options including high-speed analog comparators, cycle-by-cycle current limiting, and programmable fault counting.
- Synchronization of DPWM waveforms between multiple UCD3138 family devices.
- Fully programmable high-performance processor with 32KB of program flash, 2KB of data flash, and 4KB of data RAM.
- Internal temperature sensor and communication peripherals including I2C/PMBus and UARTs.
Applications
- Power Supplies: The UCD3138128APFCR is ideal for various power supply applications, including AC-DC and isolated DC-DC power supplies.
- Telecom Rectifiers: It is suitable for telecom rectifier applications due to its high performance and integration.
- Power Factor Correction (PFC): The device supports PFC applications, ensuring high efficiency and compliance with power factor standards.
- Isolated DC-DC Modules: It is used in isolated DC-DC modules for IT and network infrastructure, offering superior levels of integration and performance.
Q & A
- What is the UCD3138128APFCR used for?
The UCD3138128APFCR is a highly integrated digital controller used for isolated power applications, including power factor correction, power supplies, and telecom rectifiers.
- What type of processor does the UCD3138128APFCR use?
The device uses a 32-bit ARM7TDMI-S RISC microcontroller with a clock speed of 31.25 MHz.
- How many DPWM outputs does the UCD3138128APFCR have?
The device has up to 8 high resolution DPWM outputs with 250-ps pulse width resolution.
- What are the key features of the feedback control in the UCD3138128APFCR?
The device supports up to 3 independent feedback loops with dedicated PID-based hardware and 2-pole/2-zero configurable compensators.
- What are the communication peripherals available on the UCD3138128APFCR?
The device includes I2C/PMBus and UART communication peripherals.
- What is the operating temperature range of the UCD3138128APFCR?
The operating temperature range is -40°C to 125°C.
- Does the UCD3138128APFCR support synchronization of DPWM waveforms?
Yes, it supports synchronization of DPWM waveforms between multiple UCD3138 family devices.
- What are the memory specifications of the UCD3138128APFCR?
The device has 32 KB of program flash, 2 KB of data flash with ECC, and 4 KB of data RAM.
- What kind of fault protection does the UCD3138128APFCR offer?
The device offers feature-rich fault protection options including high-speed analog comparators, cycle-by-cycle current limiting, and programmable fault counting.
- Is the UCD3138128APFCR suitable for high-efficiency applications?
Yes, it includes features such as burst mode, ideal diode emulation, and synchronous rectifier soft on/off for high efficiency and light load management.
- Can the UCD3138128APFCR be programmed and configured?
Yes, the device is fully programmable, and it supports tools like the Fusion Digital Power Studio GUI for configuration and monitoring.
