4056D

@@ -0,0 +1,47 @@+# 4056D++**HL** · Battery Management · ESOP-8++4056D 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. Tied to the midpoint of an external NTC/resistor divider from VCC; charging is suspended when V(TEMP) falls outside 45%*VCC..80%*VCC. Tie to GND to disable temperature monitoring. |+| 2 | PROG | bidirectional | Constant-current program pin and charge-current monitor. A resistor R_PROG to GND sets I_BAT = 1100 / R_PROG (A) (e.g. 1kΩ → 1000mA). Pin regulates to ~1.0V in current mode; leaving it floating puts the device into shutdown. |+| 3 | GND | power_in | Device ground reference. Also connected to the exposed thermal pad on the bottom of the ESOP-8 package for heat dissipation. |+| 4 | VCC | power_in | Positive input supply, 4.2V to 9.0V (typ. 5V, absolute max 9V). Bypass with 10µF to GND. UVLO threshold ~3.6V; VCC-adaptive circuit engages at ~4.3V to reduce charge current if the source droops. |+| 5 | BAT | power_out | Charge current output to the Li-ion battery positive terminal. Regulates to 4.2V float (±1%); delivers programmed CC current up to 1A, trickle current ~230mA below V_TRIKL (2.9V). Bypass with 10µF; reverse-battery protected (leakage <5mA). |+| 6 | STDBY | output | Open-drain charge-complete (standby) indicator, active-low. Pulled low (typ. 0.3V at 5mA) when the battery is fully charged; high-impedance otherwise. Typically drives a green LED to VCC. |+| 7 | CHRG | output | Open-drain charge-in-progress indicator, active-low. Pulled low (typ. 0.3V at 5mA) while charging; high-impedance when done or in fault. Blinks ~1-2s period to signal 'no battery' when TEMP is tied to GND. |+| 8 | CE | input | Chip enable input. Drive high to enable charging; drive low to place the device in shutdown (battery leakage <1µA, supply current <70µA). Absolute max range -0.3V to 10V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HL |+| Package | ESOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `4056D`++## CAD (KiCad official)++- Symbol: `4056D`+- 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:** [HL datasheet](docs/4056d-datasheet.pdf) (10 pp, sha256 `86254f07866bff7b`, 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/4056d-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "4056d",+  "version": "0.1.0",+  "type": "component",+  "description": "HL Battery Management, ESOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "pmic",+    "4056d"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "4056d.kicad_sym",+    "4056d.kicad_mod",+    "4056d.glb",+    "4056d.step",+    "4056d.lbr",+    "docs/hero.png",+    "docs/4056d-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file