# CN3170

**ShangHai Consonance Elec** · Battery Management · SOP-8-EP

CN3170 from ShangHai Consonance Elec, in a SOP-8-EP. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | TEMP | input | Battery temperature sense input: a nominal 10 kΩ NTC to GND sets the pin voltage with the 30 µA pin current, charging pauses when TEMP is below 0.1 V or above 0.85 V, and a fixed 10 kΩ resistor to GND is used if temperature monitoring is not needed. |
| 2 | ISET | passive | Charge-current program and monitor pin: RISET from ISET to GND sets ICH = 1182V/RISET, the pin sits at 0.135 V in trickle and 1.205 V in constant-current mode, and a short to GND or an abnormally low RISET triggers overcurrent shutdown above 1.0-1.5 A. |
| 3 | GND | power_in | Power ground for the device. |
| 4 | VIN | power_in | Positive input supply, specified at 4.4 V to 6 V, that powers the internal circuits; the device enters sleep mode when VIN is within 10 mV of BAT and is undervoltage-locked-out below about 2.4-2.65 V. |
| 5 | BAT | power_out | Battery connection that delivers the charge current and constant-voltage charge (4.2 V default); sleep-mode and UVLO battery drain is below 3 µA, and a 1 µF to 10 µF ceramic capacitor from BAT to GND is required for stability. |
| 6 | DONE | output | Open-drain charge-complete indicator that is pulled low by an internal switch when charging ends and is high-impedance otherwise, with a 10 mA sink capability and 6 V maximum leakage rating. |
| 7 | CHRG | output | Open-drain charging-status indicator that is pulled low by an internal switch while charging is in progress and is high-impedance otherwise, with a 10 mA sink capability and 6 V maximum leakage rating. |
| 8 | FB | input | Battery-voltage sense input connected directly at the battery positive terminal to regulate the constant-voltage charge to 4.2 V ±1%, with a resistor from FB to BAT raising the float voltage per VREG = 4.2 + 3.707×10⁻⁶×Rx and FB input current of 1.8-5 µA. |
| 9 | Exposed PAD | power_in | Exposed thermal pad on the underside of the package that must be soldered to the GND copper on the PCB to achieve the maximum charge current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ShangHai Consonance Elec |
| Package | SOP-8-EP |
| Category | Power Management (PMIC) |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `CN3170`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`
- 3D model: SOP-8-EP (KiCad packages3D, STEP)
- 3D model files: `cn3170-etched.step` / `cn3170-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cn3170.step` / `cn3170.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [ShangHai Consonance Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590902600865177600) (12 pp, sha256 `61c63a3179310621`, retrieved 2026-10-09, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cn3170-datasheet.pdf)