ZSPM2000 Digital Single-phase PWM Controller for DC/DC Supplies
The ZSPM2000 is a configurable true-digital single-phase PWM controller for high-current, non-isolated DC/DC supplies. The ZSPM2000 includes a high-speed MOSFET driver for a synchronous step-down converter in a single-rail and single-phase configuration. The ZSPM2000 integrates a digital control loop, optimized for maximum flexibility and stability, as well as load step and steady-state performance. In addition, a rich set of protection and monitoring functions is provided. On-chip, non-volatile memory (NVM) and an I²C interface facilitate configuration. IDT’s PC-based Pink Power Designer™ graphical user interface (GUI) provides a user-friendly and easy-to-use interface to the device for communication and configuration. It can guide the user through the design of the digital compensator and offers intuitive configuration methods for additional features, such as protection and sequencing.
For more information about the ZSPM200, visit www.IDT.com/ZSPM2000.
Hi, my name is David Grice. I’m a field application engineer at IDT and today we’re going to be taking a look at our ZSPM2000 & Evaluation Board, which is the newest product in our lineup of smart power management controllers. This is a typical set up for development with the ZSPM1000 or 2000 and today we’re looking specifically at the evaluation board for the ZSPM2000. You can see on the board the ZSPM2000 surrounded by the input and output filter capacitors. It’s a very small 4 by 4 package.
Also the interface between the PMBus and the USB in our PC implemented GUI is handled by the dongle that you see with the ZMDI logo. This translates the PMBus from the USB allowing for ease of programming and use. The GUI interface is our pink power designer and this is a standard interface for all of our ZSPM products. It has several tabs across the top and typically the designer will just start with the left tab, start entering the information and then follow to the right and continue to fill in the information for a particular design. So, we start with a power stage design and put in all the standard input and output voltage parameters, the typical output current and the power stage parameters inductance, filter capacitors etc.
After that, entered the next stage is usually the compensation tab and this is where you can see the real benefits over a state law controller. We have two completely separate independent loops, one for steady state and one for transient compensators. Here the user can input the correct damping and gain in phase margin parameters, some of the special features of our controller which I’ll talk about more in a minute. And then hit the calculate button and a mat lab engine will compute all of the parameters for the two PID loops. And again these loops operate completely simultaneously and independently.
The next stage is to configure all of the start up and turn off parameters. You can put in a rise time, or fall time, a delay for the on off and then wide range of protection features for over voltage, under voltage, over current, maximum temperature and if any of these are exceeded, there are two settings. One is a warning which will be communicated via the PMBus however the controller will continue to run.
The next level is a fault. If a fault level occurs the controller will be stopped and require a reset to restart. The controlling program allows the user to calibrate the temperature sensor and the current detection. These are typically calibrated one time, programmed into the part and they don’t need to be changed again after that. The last tab is the monitoring function where you can manually control and monitor different operating parameters of the device manually before you completely program it as a standalone device.
So at this point we have a 12 volt supply going into the board and I have it set for 1.2 volt output and it’s set to work by a command rather than a pin. So once I press this button, the controller starts. We can see here the output voltage is set to exactly 1.2 volts. We have two temperature monitors. One is internal to the device, one is external, for example the power mosfets or the inductor.
This graph shows the current and it looks like we have a lot of spikes here because the board has a built in transient generator where the user can select 5 or 10amp transients and observe the recovery response. Just as an example here we can change the output voltage to 1.25 on-the-fly, click Apply and you see the output voltage change to 1.25. This is very useful where you need applications that the voltage needs to be changed on-the-fly, for example SFED [SP] applications.
The last tab that we haven’t looked at yet is just a helpful diagram and you can see that once the ZSPM2000 is connected, the GUI automatically recognizes the correct device and changes the outline diagram for easy reference. These are the key features of the Pink Power designer GUI. For any additional information please contact us at www.idt.com. One of our application engineers or field application engineers can provide additional information or demonstrations on site.
The ZSPM2000 integrates a digital control loop, optimized for maximum flexibility and stability, as well as load step and steady-state performance. In addition, a rich set of protection and monitoring functions is provided. On-chip, non-volatile memory (NVM) and an I2C™ interface facilitate configuration.
IDT’s PC-based Pink Power Designer™ graphical user interface (GUI) provides a user-friendly and easy-to-use interface to the device for communication and configuration. It can guide the user through the design of the digital compensator and offers intuitive configuration methods for additional features, such as protection and sequencing.