FH9261-DCJ

@@ -0,0 +1,45 @@+# FH9261-DCJ++**XIN FEI HONG** · Battery Management · SOT-23-6++FH9261-DCJ from XIN FEI HONG, 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 N-MOSFET gate drive output. Pulled to VDD (V_DH = VDD-0.02V typ) to enable the discharge FET during normal operation; pulled low (V_DL = 0.1V typ, 0.5V max) to inhibit discharge on over-discharge, discharge over-current, or load short-circuit. V_OD absolute-max range VSS-0.3V to VDD+0.3V. |+| 2 | CS | input | Current-sense / charger-detect input. Monitors the voltage between VSS and the pack's negative terminal (PB-) through the two series MOSFETs to detect discharge over-current (V_DIP = 240mV typ), load short-circuit (V_SIP = 0.58V typ, fixed), and charge over-current (V_CIP = -150mV typ). Also senses charger presence via V_CIP threshold. High-withstand pin: absolute-max V_CS = VDD-25V to VDD+0.3V (25V max between VDD and CS). |+| 3 | OC | output | Charge-control N-MOSFET gate drive output. Pulled to VDD (V_CH = VDD-0.02V typ) to enable the charge FET; pulled low (V_CL = 0.1V typ, 0.5V max) to inhibit charging on over-charge or charge over-current. High-withstand pin: absolute-max V_OC = VDD-25V to VDD+0.3V (survives reverse-connected charger up to 25V vs VDD). |+| 4 | NC | unconnected | No internal connection. Leave floating or tie to a copper pad; no electrical function. |+| 5 | VDD | power_in | Positive supply input. Connect to battery + through a 100Ω (100Ω typ, 200Ω max) series resistor R1 with a 0.1µF decoupling capacitor C1 from VDD to VSS. Operating range V_DSOP1 = 1.5V to 8V; absolute-max VDD-VSS = -0.3V to +10V. Operating current I_DD = 3.0µA typ / 6.0µA max at VDD=3.9V. |+| 6 | VSS | power_in | Ground / negative supply input. Connect directly to battery - (the pack common node between the cell and the two protection MOSFET sources). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | XIN FEI HONG |+| Package | SOT-23-6 |+| Category | PMIC |+| Pins | 6 |++## Ordering variants++- `FH9261-DCJDCJ`++## CAD (KiCad official)++- Symbol: `FH9261-DCJ`+- 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:** [XIN FEI HONG datasheet](docs/fh9261-dcj-datasheet.pdf) (18 pp, sha256 `3215be66c4cfc32f`, 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/fh9261-dcj-datasheet.pdf)

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