UCD9248
- Fully Configurable Multi-Output and Multi- Phase Non-Isolated DC/DC PWM Controller
- Controls Up to 4 Voltage Rails and Up to 8 Phases
- Supports Switching Frequencies Up to 2MHz with 250 ps Duty-Cycle Resolution
- Up To 1mV Closed Loop Resolution
- Hardware-Accelerated, 3-Pole/3-Zero Compensator with Non-Linear Gain for
Improved Transient Performance - Supports Multiple Soft-Start and Soft-Stop Configurations Including Prebias Start-up
- Supports Voltage Tracking, Margining and Sequencing
- Supports Current and Temperature Balancing for Multi-Phase Power Stages
- Supports Phase Adding/Shedding for Multi-Phase Power Stages
- Sync In/Out Pins Align DPWM Clocks Between Multiple UCD92xx Devices
- 12-Bit Digital Monitoring of Power Supply Parameters Including:
- Input/Output Current and Voltage
- Temperature at Each Power Stage
- Multiple Levels of Over-current Fault Protection:
- External Current Fault Inputs
- Analog Comparators Monitor Current Sense Voltage
- Current Continually Digitally Monitored
- Over- and Under-voltage Fault Protection
- Over-temperature Fault Protection
- Enhanced Nonvolatile Memory with Error Correction Code (ECC)
- Device Operates From a Single Supply with an Internal Regulator Controller
That Allows Operation Over a Wide Supply Voltage Range - Supported by Fusion Digital Power Designer, a Full Featured PC Based Design
Tool to Simulate, Configure, and Monitor Power Supply Performance
The UCD9248 is a multi-rail, multi-phase synchronous buck digital PWM controller designed for non-isolated DC/DC power applications. This device integrates dedicated circuitry for DC/DC loop management with flash memory and a serial interface to support configurability, monitoring and management.
The UCD9248 was designed to provide a wide variety of desirable features for non-isolated DC/DC converter applications while minimizing the total system component count by reducing external circuits. The solution integrates multi-loop management with sequencing, margining, tracking and intelligent phase management to optimize for total system efficiency. Additionally, loop compensation and calibration are supported without the need to add external components.
To facilitate configuring the device, the Texas Instruments Fusion Digital Power™ Designer is provided. This PC based Graphical User Interface offers an intuitive interface to the device. This tool allows the design engineer to configure the system operating parameters for the application, store the configuration to on-chip non-volatile memory and observe both frequency domain and time domain simulations for each of the power stage outputs.
TI has also developed multiple complementary power stage solutions – from discrete drivers in the UCD7k family to fully tested power train modules in the PTD family. These solutions have been developed to complement the UCD9k family of system power controllers.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | Digital PWM System Controller - UCD9248 datasheet (Rev. A) | 2012年 8月 24日 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Test report | TI Power Reference Design for Xilinx® Kintex®-7 (KC705) (Rev. A) | 2014年 12月 16日 | ||
| Analog Design Journal | System telemetry: What, why and how? | 2014年 4月 11日 | ||
| Application note | Digital Loop Exemplified | 2011年 9月 23日 | ||
| User guide | Using the UCD92xx Digital Point-of-Load Controller | 2011年 4月 13日 | ||
| User guide | UCD92xx PMBus Command Reference | 2008年 11月 3日 | ||
| Application brief | PowerPAD™ Made Easy (Rev. B) | 2004年 5月 12日 |
設計與開發
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