HT2122ARTZ

@@ -0,0 +1,48 @@+# HT2122ARTZ++**HTCSEMI** · Battery Management · SOT-23-6++HT2122ARTZ from HTCSEMI, in a SOT-23-6. 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 | OD | output | Discharge-control MOSFET gate drive terminal. Drives the gate of the external N-channel discharge FET. High (~VDD-0.02 V) in normal state, pulled low (~0.2 V) to open the discharge path when an overdischarge or discharge-overcurrent event is detected. |+| 2 | OC | output | Charge-control MOSFET gate drive terminal. Drives the gate of the external N-channel charge FET. High (~VDD-0.02 V) in normal state, pulled low (~0.2 V) to open the charge path when an overcharge or charge-overcurrent event is detected. High level is pulled up to VDD; low level is pulled down to CS. |+| 3 | CS | input | Current-sense / charger-detect input terminal. Senses the voltage drop across the external charge/discharge MOSFETs to detect overcurrent, load short circuit, and charger insertion. High-voltage tolerant input, absolute max rating VDD-33 V to VDD+0.3 V (33 V tolerant). |+| 4 | VC | input | Cell balance / intermediate tap sense terminal. Connects to the negative terminal of battery cell 1 and the positive terminal of battery cell 2, allowing per-cell voltage monitoring of the 2-series LiFePO4 pack. Typically connected via a 330 Ω series resistor and 0.1 uF decoupling capacitor. |+| 5 | VDD | power_in | Positive supply input; connects to the positive terminal of battery cell 1 (top of the 2S stack). VDD-VSS operating range 1.5 V to 10 V, absolute max VSS-0.3 V to VSS+10 V. Typical operating current 5 uA, max 9 uA at VDD=6.4 V. |+| 6 | GND | power_in | Ground / negative supply input (VSS). Connects to the negative terminal of battery cell 2 (bottom of the 2S stack). Reference for all internal detection thresholds. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | HTCSEMI |+| Package | SOT-23-6 |+| Category | PMIC |+| Pins | 6 |++## Ordering variants++Same part, different packaging or reel option.++- `HT2122ARTZ`++## CAD (KiCad official)++- Symbol: `HT2122ARTZ`+- Footprint: `Package_TO_SOT_SMD:SOT-23-6`+- 3D model: SOT-23-6 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [HTCSEMI datasheet](docs/ht2122artz-datasheet.pdf) (15 pp, sha256 `9442df04ff3e893e`, 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/ht2122artz-datasheet.pdf)

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