CN3085

@@ -0,0 +1,49 @@+# CN3085++**ShangHai Consonance Elec** · Battery Management · SOP-8-EP++CN3085 from ShangHai Consonance Elec, in a SOP-8-EP. 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 monitoring input. Connect to the output of an NTC divider tied to the battery. Charging is suspended (battery fault) when V(TEMP) is <45% or >80% of VIN. Tie TEMP to GND to disable temperature monitoring. Input current is <=0.5uA. |+| 2 | ISET | input | Constant-charge-current programming pin. Connect a resistor RISET from ISET to GND; ICH = 1218V / RISET. V(ISET) is regulated to 0.12V in trickle, 1.205V in CC, and 0.72V in maintenance modes. |+| 3 | GND | power_in | Device ground / power return. |+| 4 | VIN | power_in | Positive input supply, 3.8V to 6V typical (absolute max 6.5V). Powers the internal circuitry and the pass transistor to BAT. When VIN-VBAT < 10mV, CN3085 enters sleep mode with BAT current <3uA. UVLO threshold ~3.2V (rising). |+| 5 | BAT | power_out | Battery connection / charge output. Sources charge current (up to 1A) to the battery positive terminal via the internal PMOS pass transistor. In sleep mode BAT sink current is <3uA. Requires 4.7uF-10uF cap from BAT to GND for stability. |+| 6 | RC | passive | Maintenance-charge timer program pin. External R (R5, 20k-5M) and C (C1, >1nF) set the maintenance charge time: T(s) = 2654*R5*C1 + 4980*C1*1e3. When the timer expires, charging ends. |+| 7 | CHRG | output | Open-drain charge status indicator (active-low). Pulled low during trickle, constant-current and maintenance charging; high-Z otherwise (including battery-fault or no-battery states). Sink capability 10mA at V(CHRG)=0.3V; leakage <=1uA at 5.5V. Typically drives an LED to VIN through a series resistor. |+| 8 | FB | input | Battery-voltage feedback input. Battery voltage is fed back via R3/R4 divider such that VBAT = VFB * (1 + R3/R4). FB thresholds: VMAX=1.205V (CC ceiling), VCCT=1.083V (CC termination, ~90% of max), VPRE=0.843V (trickle threshold, ~70% of max), VRECH=1.052V (auto-recharge, ~87.3% of max). |+| EP | EP | power_in | Exposed thermal pad on the underside of the SOP-8-PP package. Solder to the PCB ground copper plane for heat dissipation; required for full charge-current capability. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | ShangHai Consonance Elec |+| Package | SOP-8-EP |+| Category | PMIC |+| Pins | 9 |++## Ordering variants++- `CN3085`++## CAD (KiCad official)++- Symbol: `CN3085`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8-EP (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [ShangHai Consonance Elec datasheet](docs/cn3085-datasheet.pdf) (13 pp, sha256 `424ad4101ca2b6d3`, 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/cn3085-datasheet.pdf)

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