4056H

@@ -0,0 +1,51 @@+# 4056H++**HL** · Battery Management · ESOP-8++4056H from HL, 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 mid-point of an NTC/resistor divider from VCC; charging pauses when V(TEMP) is outside 30%*VCC to 60%*VCC. Tie to GND to disable temperature monitoring. |+| 2 | PROG | bidirectional | Constant-current programming pin and charge-current monitor. A resistor RPROG from PROG to GND sets IBAT (0.82K -> 1000mA, 2K -> 450mA). Pin regulates to ~1.0V in current mode; floating PROG shuts the charger down. |+| 3 | GND | power_in | Device ground. The exposed thermal pad on the package underside is also connected to GND and should be soldered to a copper heat-spreading area. |+| 4 | VCC | power_in | Positive supply input. Nominal operating voltage 5V; absolute maximum 30V, with input OVP shutdown at ~6.5V (450mV hysteresis). UVLO threshold ~3.80V. |+| 5 | BAT | power_out | Single-cell Li-Ion battery connection. Sources up to 1A charge current, regulates to 4.2V float (4056H-42 option). Auto-recharge threshold is 95mV below VFLOAT; sleep-mode leakage <0.1uA when VCC is removed. Requires ~10uF bypass to GND. |+| 6 | STDBY | output | Open-drain, active-low charge-complete indicator. Pulls low (VOL <=0.5V @ 5mA) when the battery is fully charged and the charger is in standby; high-impedance otherwise. Typically drives a green LED to VCC through a series resistor. |+| 7 | CHRG | output | Open-drain, active-low charging status output. Pulls low (VOL <=0.5V @ 5mA) while charging is in progress; high-impedance when charging is complete or the chip is in fault/standby. Typically drives a red LED to VCC. |+| 8 | CE | input | Chip enable input (Schmitt). Drive high (up to 28V tolerant) to enable charging; drive low to place the device in shutdown (battery leakage <0.1uA). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HL |+| Package | ESOP-8 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `4056H-42ES`+- `4056H-42DF8`++## CAD (KiCad official)++- Symbol: `4056H`+- 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:** [HL datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590905190478393344) (10 pp, sha256 `381cd0b928324486`, 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/4056h-datasheet.pdf)

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