Background

The power delivery system is a crucial component of electronic devices, such as new energy vehicle charging equipment, communication base station power supplies, etc. It converts input power into power suitable for the device and maintains the stability and long-term reliability of the output voltage. Additionally, the power delivery system also has protective and management functions, protecting the device from anomalies in the power supply and enhancing the reliability and safety of the electronic system. Therefore, the rational design and selection of the power delivery system are crucial in electronic system design. The power delivery system consists of the following basic components:

 1. Power Input Module: This part is responsible for introducing external electric power into the power delivery system.

2. Transformer: Converts the input voltage to the voltage required by the device.

3. Rectifier: Used to convert AC power into DC power.

4. Filter: Filters out power supply ripple, resulting in a more stable output current.

5. Voltage Regulator: Automatically adjusts the output voltage based on load changes to ensure a stable voltage supply.

6. Protection Circuit: Circuit modules for protective functions like short-circuit protection, over-current protection, and over-voltage protection.

As the power consumption of electronic systems increases, the requirements for power integrity become more stringent. This requires us to perform power circuit simulation in the design process of the power delivery system, such as simulating output ripple, dynamic response, PWM switching waveform timing, feedback loop parameters, etc., to ensure the quality of the power design.

Solution

Xpeedic's ChannelExpert facilitates time-domain simulation of power delivery system circuits, capable of simulating power circuit output noise, PWM waveforms, feedback loop parameter optimization, etc., to ensure the quality of power system design.

1. Use Notus to extract the parasitic parameters (multi-port SPICE model) of the power network PCB.

2. Load the VRM circuit model into ChannelExpert.

3. Import the multi-port SPICE model of the PCB and the VRM circuit model to build a full-link circuit model.

4. In the multi-port PCB SPICE model, the capacitor SPICE model is connected according to the actual design.

5. Set the VRM's feedback line, feedback loop parameters, and load current.

6. Set the simulation scan parameters and observation probes to conduct simulation and optimization of the power circuit design.