To begin the design process, the following component values must be selected:
- Inductor
- Choose the appropriate value of the inductor based on application cost requirements, ripple requirements, and Section 7.3.11.
- BOOST capacitor
- Choose the appropriate BOOST capacitor value based on application cost requirements, ripple requirements, and Section 7.3.11.
- Diodes
- The D0 and D2 diodes are used to help meet the surge-protection requirement of the application. If the application does not require surge protection, remove these diodes. For diode component selection, refer to Section 7.3.11.3.
- The D1 diode is used for the boost loop. TI
recommends a Schottky diode for D1. The application requirements,
which include input power range, output power range, and the current
requirement, determine the current and voltage capability of the D1
diode.
- The D3 diode is to help with the output
protection for the VLNB voltage. TI recommends a Schottky diode for
D3. The application requirements determine the current and voltage
capability of the D3 diode.