Rechargeable Battery Pack Design
1:31
Here’s the updated BOM after executing the component additions:
Table
| Designator | Qty | Part | Description |
|---|---|---|---|
| J1 | 1 | J1 | USB-C inlet with CC resistors |
| U1 | 1 | U1 | 1 A linear Li-ion charger IC |
| U2 | 1 | U2 | Over-charge/over-discharge protection IC + FETs |
| U3 | 1 | U3 | Fixed 3.0 V LDO regulator, 250 mA |
| U4 | 1 | U4 | 10-step LED bar-graph driver |
| SW1 | 1 | Pushbutton, Tactile | Momentary “Test” button |
| D1 | 10 | LED, 0805 | Indicator LEDs (D1–D10) |
| B1 | 4 | Li-ion Cell | 1 S Li-ion cells in parallel |
| C1 | 3 | Capacitor, 100 nF, 0603 | Decoupling capacitors for U1, U3, U4 |
| C2 | 3 | Capacitor, 10 µF, 0603 | Bulk decoupling capacitors for U1, U3, U4 |
| R1 | 1 | Resistor, 10 kΩ, 0603 | Pull-down for SW1 |
| R2 | 2 | Resistor, 5.1 kΩ, 0603 | CC-line resistors for USB-C interface |
Add battery fuse
LDO thermal pad
USB-C layout guidance
351 days
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