TC4059

@@ -0,0 +1,50 @@+# TC4059++**Shenzhen Fuman** · Battery Management · ESOP-8++TC4059 from Shenzhen Fuman, 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 | TEMP | input | Battery temperature sense input. Connect to the divider between VCC, an NTC thermistor and GND. Charging is suspended when V(TEMP) < 30% VCC (hot) or > 60% VCC (cold). Tie to GND to disable the NTC feature; other charging functions remain normal. |+| 2 | PROG | passive | External charge-current programming pin. A resistor from PROG to GND sets fast-charge current per I_BAT = V_PROG / R_PROG × 1700 (V_PROG = 1V in CC mode, 0.1V in trickle mode). Also used to monitor instantaneous charge current. 1% precision resistor recommended. |+| 3 | GND | power_in | Device ground / power return. |+| 4 | VCC | power_in | Input supply. Normal operating range 4.5-6V (typical 5V); OVP trips at ~7V (6.7-7.3V) and absolute max is 36V (slow ramp), enabling survival of hot-plug transients. UVLO ~3.5V rising with 100mV hysteresis. |+| 5 | BAT | power_out | Battery connection / charge current output. Regulates to 4.2V float and sources the programmed charge current up to 1A. High-voltage tolerant to 30V; sleep-mode leakage ≤ 30nA. Bypass with 1-10µF to GND close to the pin. |+| 6 | STDBY | output | Open-drain charge-complete indicator. Internally pulled low (up to 5mA) when charging has terminated (charge current has fallen below I_TERM); high-impedance otherwise. Absolute max 7V. |+| 7 | CHRG | output | Open-drain charging status indicator. Pulled low (up to 5mA) while a charge cycle is in progress; high-impedance otherwise. Typically drives an LED to indicate charging activity. Absolute max 7V. |+| 8 | EN | input | Chip enable input, TTL/CMOS compatible. Logic high (V > 1V typ) enables normal operation; logic low (V < 0.9V typ) puts the device into shutdown (~22µA). Absolute max 7V; leakage ±1µA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shenzhen Fuman |+| Package | ESOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `TC4059E`+- `TC4059D3`+- `TC4059D2`+- `TC4059S`++## CAD (KiCad official)++- Symbol: `TC4059`+- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`+- 3D model: ESOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Shenzhen Fuman datasheet](docs/tc4059-datasheet.pdf) (10 pp, sha256 `ee4d4d1e5d946092`, 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/tc4059-datasheet.pdf)

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