Designing DC-DC convertor : 24V - 5V Buck convertor, 3Amps
Buck converter--> Basic DC-DC convertor topology which is used for stepping down the Voltage. So below is the simplistic view of the buck converter, don't wanna make the content boring by explaining how it works and all. I wanna document the calculation behind the value of the inductor and capacitor. So let's go straight into the matter. The TI "LMR51430XDDCR" IC is selected for a 24V to 5V converter which is capable of a maximum of 3Amps. Input Specification: Input Voltage: 4.5-V to 36-V input voltage range. Required output voltage: 5V. Continuous Output Current: 3 Amps Frequency: 500-kHz Calculations: 1. Calculating Duty cycle, D: `D=\frac{V_{out}}{V_{i n} }` `D= 5/24` `D = 0.2084` 2. Feedback resistor calculations: `R_{FBT}=\frac{V_{out}-V_{ref}}{V_{ref} } \times R_{FBB}` `R_{FBT}= ((5 - 0.6) / 0.6) \times 13.7 \times 10^ 3 ` `R_{FBT}=100.4kohm` 3. Inductor calculation: `L_{min}=\frac{V_{i n-max} - V_{out}}{I_{out}\times K_{i nd}} \times \frac{D}{...