**Application fields and module examples:** 1. **Power amplifier module:** Suitable for applications requiring high power amplification, such as audio amplifiers and RF power amplifiers. 2. **Power inverter module:** Used to design power inverters to achieve DC to AC conversion. 3. **Power switch module:** Can be used to design power switch circuits to achieve efficient power switch control. 4. **Low power module:** Provides efficient power management in devices requiring low power consumption, such as portable electronic products. **Note:** The above are only general suggestions, and specific applications need to be evaluated in detail based on project needs and circuit design requirements.