XP4302

@@ -0,0 +1,45 @@+# XP4302++**Shenzhen Fuman** · Battery Management · ESOP-8++XP4302 from Shenzhen Fuman, 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 | VIN | power_in | Charger power input. Recommended operating range 4.6V to 5.5V (typ. 5V); VIN UVLO ~4.6V rising / 4.4V falling; VIN OVP ~5.6V; absolute max 8V. Bypass with >=10uF (20uF recommended). |+| 2 | LED1 | output | Charge status indicator 1 (open-drain style LED driver). ON while charging (trickle/CC/CV), OFF when charging is complete. Blinks on OTP or NTC out-of-range fault. May be left floating if unused. |+| 3 | LED2 | output | Charge status indicator 2. OFF while charging, ON when charge is complete (full). May be left floating if unused. |+| 4 | VSET | input | Battery full-charge (regulation) voltage set pin. Default connection: tie to GND for the standard 4.2V full-charge voltage. |+| 5 | NTC | input | Battery temperature sense input. Internal ~70k pull-up to VIN forms a divider with an external 100k NTC (25 degC) in parallel with 300k; charging halts when VNTC > 70%*VIN or < 30%*VIN. Tie to a 75k resistor to GND to disable NTC; must not be left floating. |+| 6 | BAT | power_out | Battery connection / voltage feedback input. Charges single-cell Li-ion to 4.2V (VBAT_FULL), 3.95V recharge threshold, 104%*VBAT OVP. Bypass with >=10uF. |+| 7 | SEN | input | Charge current sense input. Connects to the high side of an external ~5 mOhm sense resistor between the buck inductor/output cap node and BAT for closed-loop current regulation (2A CC). |+| 8 | SW | output | Synchronous buck switch node. Connect to a 10uH inductor to the SEN/output capacitor node. Internal high-side (~60 mOhm) and low-side (~70 mOhm) MOSFETs, 750 kHz fixed switching frequency. |+| 9 | GND (Power Pad) | power_in | Exposed thermal/power ground pad on the bottom of the ESOP-8 package. Must be soldered to the PCB ground plane for proper electrical return and thermal dissipation (RthetaJA ~42 degC/W). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shenzhen Fuman |+| Package | ESOP-8 |+| Category | PMIC |+| Pins | 9 |++## CAD (KiCad official)++- Symbol: `XP4302`+- 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:** [Shenzhen Fuman datasheet](docs/xp4302-datasheet.pdf) (10 pp, sha256 `515ad9c2d6efcde2`, 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/xp4302-datasheet.pdf)

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