When designing power converters for industrial wide input and output voltages, correct key component selection and converter dimensioning is very important to ensure the converter will function correctly and with high reliability in harsh industrial environments. Key points to consider are correct component de-rating, high-voltage and high temperature effects on component parameters, converter stability at different input voltage and load conditions, component power loss and thermal heating effects, etc.
In order to make industrial buck converter component selection and converter design simple and quick, Richtek has introduced the new highly flexible buck converter family RTQ636x for industrial applications such as vehicle and home equipment, PoE adapters, PoC transmitters and receivers for CCTV systems. We have also released an interactive excel based design tool that will help circuit designers to quickly calculate the component values, including component de-rating effects and dynamic behaviour.
The RTQ6360/61/62/63/65 buck converter family has a Vin range from 4.5V up to 60V and adjustable Vout from 0.8V to VIN, and can deliver output currents from 0.5A up to 5A. Read more for the RTQ636x family introduction and general design guidelines.
The quick design tool simplifies the process to design and analyse performance, allowing users to enter design criteria and calculate suitable component values. Designing with the RTQ636x family requires several focus points, including switching frequency, inductor value, input capacitor and output capacitor de-rating, Schottky diode selection criteria, loop compensation, start-up, and shut-down levels, soft-start and more.