HTP4056

@@ -0,0 +1,44 @@+# HTP4056++**HXY MOSFET** · Battery Management · ESOP-8++HTP4056 from HXY MOSFET, 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. Connects to an NTC thermistor divider from the battery pack; charging is inhibited when the pin voltage falls outside the VTEMP-L (~45%VCC) to VTEMP-H (~80%VCC) window. |+| 2 | PROG | passive | Charge current program pin. An external resistor from PROG to GND sets the constant-current charge level (VPROG ≈ 1.0 V; IBAT = 1000 mA with RPROG = 1.4 kΩ). Can also be used to monitor charge current. |+| 3 | GND | power_in | Device ground. Tie to system ground; also connect the exposed thermal pad to GND for optimal thermal performance. |+| 4 | VCC | power_in | Charger input supply. Operating range 4.0 V to 6 V (absolute max 8.5 V). Provides current to the internal power PMOSFET that charges the battery on BAT. |+| 5 | BAT | power_out | Battery charge output. Connects to the positive terminal of the single-cell Li-ion battery. Regulated float voltage 4.200 V; delivers up to ~1.0 A (ESOP-8) programmable charge current with ≤2 µA leakage when VCC is removed. |+| 6 | STDBY | output | Open-drain charge-complete (standby) status indicator. Pulls low when the charge cycle terminates and the part enters standby; high-impedance otherwise. VOL ≤ 0.3 V at 5 mA sink; typically drives an LED to GND through a pull-up. |+| 7 | CHRG | output | Open-drain charging status indicator. Pulls low while charging is in progress; high-impedance when charging is complete, in shutdown, or in fault. VOL ≤ 0.3 V at 5 mA sink; typically drives an LED to GND through a pull-up. |+| 8 | NC | unconnected | No internal connection. Leave floating or tie to GND. |+| EP | GND | power_in | Exposed thermal pad on the underside of the ESOP-8 package. Must be soldered to the PCB ground plane for both electrical ground and heat sinking (θJA = 50 °C/W). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HXY MOSFET |+| Package | ESOP-8 |+| Category | PMIC |+| Pins | 9 |++## CAD (KiCad official)++- Symbol: `HTP4056`+- 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:** [HXY MOSFET datasheet](docs/htp4056-datasheet.pdf) (13 pp, sha256 `0e9323593bab6954`, 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/htp4056-datasheet.pdf)

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