# CN3142

**ShangHai Consonance Elec** · Battery Management · SOT-23-6

CN3142 from ShangHai Consonance Elec, 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 | CHRG | tri_state | Open-drain charge-status indicator output; outputs 2 Hz pulse during charging, continuous low level at end of charge, and high-impedance during sleep mode or battery over-temperature/over-cold; sink current ICHRG = 10 mA (typ) at VCHRG = 0.3 V (charge-complete state), leakage 1 µA max at VCHRG = 6 V in sleep mode. |
| 2 | GND | power_in | Power-supply ground return; PCB copper area on this pin should be maximized to improve thermal dissipation from the SOT-23-6 package. |
| 3 | BAT | power_out | Battery positive terminal; delivers trickle, constant-current (up to 400 mA), and constant-voltage (4.2 V ±1%) charge current to the battery; battery leakage current < 3 µA in sleep mode or when VIN is below the UVLO threshold (2.65 V typ). |
| 4 | VIN | power_in | Supply voltage input, 4.5 V to 6.0 V; powers all internal circuits; CN3142 enters low-power sleep mode when VIN − VBAT < 10 mV and exits sleep when VIN − VBAT rises above 60 mV; quiescent current 280-500 µA (BAT open). |
| 5 | TEMP | input | Battery temperature monitor input; pin sources 30 µA (typ) through an external 10 kΩ NTC resistor to GND; charging suspends when VTEMP < 100 mV (over-hot) or > 850 mV (over-cold); charge current reduced to 50 % ICC when 100-135 mV (warm) or 25 % ICC when 550-850 mV (cool); connect fixed 10 kΩ to GND if temperature monitoring is not used. |
| 6 | ISET | passive | Constant-current set and charge-current monitor; connect resistor RISET from this pin to GND; ICH = 502 V / RISET (A, Ω); pin voltage regulated to 0.4 V (typ) in trickle mode and 1.205 V (typ) in CC mode, allowing current monitoring via ICH = (VISET × 417) / RISET; over-current protection shuts down the device if charge current exceeds 0.47 A (typ) for more than 2 ms (typ). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ShangHai Consonance Elec |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `CN3142`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `cn3142-etched.step` / `cn3142-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cn3142.step` / `cn3142.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/8590904927466713088) (11 pp, sha256 `bbc80ba3304aaf98`, retrieved 2026-09-22, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/cn3142-datasheet.pdf)