TP4333

@@ -0,0 +1,43 @@+# TP4333++**TPOWER** · Battery Management · SOP-8++TP4333 from TPOWER, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | OUT | power_out | Boost output positive terminal and output-voltage sense input. Delivers regulated 5V (4.8-5.2V) at up to 1A to the USB load; requires low-ESR ceramic bulk cap (typ. 10uF x2) close to the pin. |+| 2 | BAT | bidirectional | Li-ion battery positive terminal. Charge current is delivered here in charge mode (0.8A CC, 100mA trickle) and battery energy is drawn from here in boost/discharge mode. Discharge cut-off 2.85V, low-battery warning 3.0V, boost start-up 3.2V. |+| 3 | SW | power_out | Drain of the internal boost-converter power NMOS (switch node). Connect the 1.5uH boost inductor between BAT and SW; inductor saturation current must exceed 3A. Boost switching frequency 0.7-1.3 MHz (typ. 1 MHz). |+| 4 | GND | power_in | Chip ground reference. Connect to a large-area ground pour; return currents for both the boost inductor and output cap should terminate at this pin. |+| 5 | SWT | bidirectional | Combined push-button input and torch-LED driver. Short-press displays battery capacity via LEDs; long-press 2s toggles the flashlight LED (max drive current 50mA). Add a 100k pull-up from BAT to SWT if the LED leakage below 1.5V exceeds 1uA. |+| 6 | VDD | power_in | Charging power input. Recommended operating range 4.5-5.5V (absolute 4.3-5.5V); accepts 5V USB source. Undervoltage lockout at VDD-VBAT = 180mV rising / 80mV falling. |+| 7 | LED2 | output | Discharge-indicator LED driver (open-drain sink, ~2mA at BAT=4V). Solid ON during normal discharge; blinks at 1Hz as a low-battery warning when VBAT falls below 3.0V. |+| 8 | LED1 | output | Charge-indicator LED driver (open-drain sink, ~2mA at BAT=4V). Blinks at 1Hz during charging and turns solid ON when the battery is fully charged. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | TPOWER |+| Package | SOP-8 |+| Category | PMIC |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `TP4333`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [TPOWER datasheet](docs/tp4333-datasheet.pdf) (5 pp, sha256 `c1bdff562f25c898`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/tp4333-datasheet.pdf)

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