brcl4054cme

@@ -0,0 +1,41 @@+# BRCL4054CME++**Foshan Blue Rocket Elec** · Battery Management · SOT-23-5++BRCL4054CME from Foshan Blue Rocket Elec, in a SOT-23-5. 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 | CHRG | output | Open-drain charge status output (active low). Strong pull-down (~10mA) via internal N-channel MOSFET during charging; weak ~20µA pull-down when charge terminated (AC present); high-impedance in UVLO. Absolute max -0.3 to 10V. Can sink up to 10mA to drive an LED. |+| 2 | GND | power_in | Device ground return. Also the primary thermal path via the ground lead to the PCB copper heat sink. |+| 3 | BAT | power_out | Charge current output to the single-cell Li-Ion battery. Regulates final float voltage to 4.2V (±1%). Supplies up to 500mA charge current; internal precision resistor divider (disconnected in shutdown) sets the float voltage. Absolute max -0.3 to 7V; short-circuit duration is continuous. |+| 4 | VCC | power_in | Positive input supply voltage, 4.25V to 6.5V (absolute max -0.3 to 10V). Provides power to the charger; must be bypassed with at least a 1µF capacitor. When VCC drops within 30mV of BAT, the device enters shutdown and IBAT drops below 2µA. |+| 5 | PROG | bidirectional | Charge-current program, charge-current monitor, and shutdown pin. A 1% resistor RPROG from PROG to GND sets ICHG = 1000V / RPROG (e.g. 2k → 500mA, 10k → 100mA). In constant-current mode this pin servos to 1V; IBAT = (VPROG/RPROG) × 1000. Floating the pin lets an internal 3µA pull-up drive PROG above the 1.21V shutdown threshold, forcing shutdown mode (ICC drops to 25µA). Pin is clamped to ~2.4V; driving beyond can draw up to 1.5mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Foshan Blue Rocket Elec |+| Package | SOT-23-5 |+| Category | PMIC |+| Pins | 5 |++## CAD (KiCad official)++- Symbol: `BRCL4054CME`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Foshan Blue Rocket Elec datasheet](docs/brcl4054cme-datasheet.pdf) (None pp, sha256 `bdd23814d94e357d`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **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/brcl4054cme-datasheet.pdf)

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