ZHCSCK0C June 2014 – September 2021 TPS55340-Q1
PRODUCTION DATA
The selected diode must have a minimum breakdown voltage (V(BR)). Use Equation 53 to calculate V(BR) which is 30.5 V in this design. The average current rating is recommended to be greater than the maximum output current. With the maximum 18-V input, average current is calculated to be 2.6 A using Equation 19. The package must also be capable of handling the power dissipation. With an estimated 0.5-V forward voltage, power dissipation is calculated with Equation 28 to be 500 mW. Diodes Inc. B340B was chosen for this design with a 40-V, 3-A rating in a SMB package.