Project Owners: Mena Azab Rayyan Mahmood
...
Component Selection
Buck:
| View file | ||
|---|---|---|
|
Part Number | Price | Comments | ||||
|---|---|---|---|---|---|---|
MAX5033DASA+Already in the bayTPS563300DRLR | $1.03 | Buck IC | ||||
$0.1615 | R1R7(1MΩ16kΩ) - Upper Lower resistor in Feedback voltage divider; by Vin | |||||
RC0805FR-07130KL0749K9L | $0.1615 | R2R6(130KΩ49.9KΩ) - Lower Upper resistor in Feedback voltage divider; by Vin | ||||
CL10B104KB8NNNCGCD21BR71H333KA01L | $0.15 | CVD & CBST - 0.1µF x2 | TYS8040151M-10 | $1 | L1 (150µF) - Inductor 27 | Css (Soft-start Cap) - 33nF |
GCD21BR71H104KA01L | $0.33 (x2) | CBST & Filtering Cap (0.1uF - 50V) | ||||
GRM21BR61H106KE43L | $0.4448 (x8) | Cin(10µF) x 8 (since it is around 1.3µF at 25.3 Volts due to DC Bias) - Ceramic Cap , 50V | ||||
TR3D476K016C0100RC0805FR-1320KL | $2$0.1415 | Cout(47uf @ 100mOhm ESR) - Tantalum | B240A-FDITR-NDR2 (20 KΩ) UVLO | |||
RC0805FR-07280KL | $0.63 | D1 - B240/A recommended by datasheet | ||||
RC0805FR-1324KL | $0.16 | R3(24kΩ) - Upper resistor in feedback voltage divider | ||||
RC0805FR-0714KL | $0.16 | R4(14kΩ) - Lower resistor in feedback voltage divider15 | R2 (280 KΩ) UVLO | |||
IHLP3232DZER4R7M11 | $2.10 | L1 (4.7uH - 8A) | ||||
GRM21BR61A476ME15K | $0.91 (x2) | Cout (47UF - 10V) x 2 |
Buck Selection:
Re-evaluating the decision of going with the MAX5033DASA+ chip for the buck converter, mainly to reduce form factor while maintaining high efficiency.
...
Part Number | Price | Vds | Rds on (max) | Continuous Current | Output Charge (nC) | Gate Charge (nC) | Rise time | Fall time | Comments |
|---|---|---|---|---|---|---|---|---|---|
1.08 | 30V | 4.2mOhm @ 18A, 10V | 60A | 6 | 13 | 12ns | 2ns | MY SELECTION | |
0.96 | 30V | 8mOhm @ 16A, 10V | 55A | 7.5 | 12.5ns | 8.2ns | Wider package size | ||
1.02 | 30V | 7mOhm @ 30A, 10V | 60A | 23.5 | 30ns | 6ns | |||
...