BL8576CS8TR

@@ -0,0 +1,49 @@+# BL8576CS8TR++**BL Shanghai Belling** · Battery Management · ESOP-8++BL8576CS8TR from BL Shanghai Belling, in a ESOP-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 | NC | unconnected | No internal connection. Leave floating or tie to GND as appropriate for the PCB layout. |+| 2 | PROG | bidirectional | Charge current program, monitor, and shutdown pin. Regulates to 1V in constant-current mode; charge current IBAT = (VPROG/RPROG)·1000, so a 1% resistor from PROG to GND sets IBAT (RPROG = 2k → ~500mA, 10k → ~100mA). Floating PROG raises it above the ~1.21V manual shutdown threshold via a 3μA pull-up, dropping ICC to ~25μA; internally clamped to ~2.4V (5mA absolute max). |+| 3 | GND | power_in | Device ground reference. Also the primary thermal path through the exposed pad / lead frame; use wide copper pours and vias to maximize allowed charge current. |+| 4 | VCC | power_in | Positive input supply, 4.25V to 6.0V (absolute max 6V). Bypass with at least 1μF to GND. Charging is inhibited by UVLO (~2.9V rising, 200mV hysteresis) and by the VCC-VBAT comparator (charger enters shutdown when VCC drops to within ~80mV of VBAT). |+| 5 | BAT | power_out | Charge current output to the Li-ion cell. Regulates to a 4.2V ±1% float voltage set by an internal precision divider; sources up to 1A of charge current. Continuous short-circuit tolerant; recharge cycle restarts when VBAT falls ~100mV below VFLOAT. |+| 6 | STDBY | output | Open-drain standby status output. Pulled low when the battery is fully charged (charge terminated); high-impedance otherwise. Requires an external pull-up to indicate the high state. |+| 7 | ~{CHRG} | output | Open-drain active-low charge status output. Pulled low (VOL ≤ 0.6V at 5mA) while a charge cycle is in progress; forced to high impedance when the BL8576 is in under-voltage lockout. Requires an external pull-up. |+| 8 | NC | unconnected | No internal connection. Leave floating or tie to GND as appropriate for the PCB layout. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | ESOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `BL8576CS8TR`++## CAD (KiCad official)++- Symbol: `BL8576CS8TR`+- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`+- 3D model: ESOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [BL Shanghai Belling datasheet](docs/bl8576cs8tr-datasheet.pdf) (10 pp, sha256 `ca045d756481b601`, 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/bl8576cs8tr-datasheet.pdf)

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