CN3702

@@ -0,0 +1,56 @@+# CN3702++**ShangHai Consonance Elec** · Battery Management · TSSOP-16++CN3702 from ShangHai Consonance Elec, in a TSSOP-16. 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 | VG | power_out | Internal LDO regulator output that supplies the internal gate-driver circuitry. Connect a 100 nF ceramic capacitor between VG and VCC. |+| 2 | PGND | power_in | Power ground for the internal gate driver and high-current return path. |+| 3 | GND | power_in | Analog ground for internal reference, amplifier and control circuitry. |+| 4 | CHRG | output | Open-drain charge-status output. Pulled low by internal transistor during charging; high-impedance otherwise. Sink capability ~12 mA (typ) at 1 V. |+| 5 | DONE | output | Open-drain charge-complete output. Pulled low by internal transistor when charging has finished; high-impedance otherwise. Sink capability ~12 mA (typ) at 1 V. |+| 6 | TEMP | input | Battery temperature-monitor input. Connect an NTC thermistor (10 kΩ @ 25 °C) between TEMP and GND. Internal ~50 uA pull-up; comparator thresholds ~1.61 V (high-temp) and ~0.175 V (low-temp) suspend charging when temperature is out of range. |+| 7 | EOC | input | End-of-charge current programming input. Connect directly to GND for the minimum termination current or through a resistor Rext (≤100 kΩ) to GND to program the termination current per IEOC = 1.278·(14350 + Rext) / (Rcs·10^6). |+| 8 | COM1 | passive | Loop compensation input 1. Connect a 470 pF capacitor between COM1 and GND. |+| 9 | COM2 | passive | Loop compensation input 2. Connect a series 120 Ω resistor and 220 nF capacitor between COM2 and GND. |+| 10 | test | input | Factory test pin. Must be connected directly to GND for normal operation. |+| 11 | COM3 | passive | Loop compensation input 3. Connect a 100 nF capacitor between COM3 and GND. Absolute-max voltage 6.5 V to GND. |+| 12 | NC | unconnected | No internal connection. |+| 13 | CSP | input | Positive charge-current sense input. Senses the voltage across the external current-sense resistor Rcs connected between CSP and BAT; the internal loop regulates VCSP−VBAT to 200 mV (typ) so that Icharge = 200 mV / Rcs. |+| 14 | BAT | input | Battery-voltage sense input and negative current-sense input. Internal precision resistor divider and reference set the 8.4 V (±1%) constant-voltage regulation point for the 2-cell battery. |+| 15 | VCC | power_in | External supply input, also powers internal circuitry. Operating range 7.5 V to 28 V; connect a bypass capacitor from VCC to GND. UVLO threshold ~6 V typical. |+| 16 | DRV | output | Gate driver output for the external P-channel MOSFET. Drives referenced to VCC (VCC−VDRV ≈ 60 mV high, ≥5.8 V low), with 30-65 ns typical rise/fall times into a 2 nF load. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | ShangHai Consonance Elec |+| Package | TSSOP-16 |+| Category | PMIC |+| Pins | 16 |++## Ordering variants++- `CN3702`++## CAD (KiCad official)++- Symbol: `CN3702`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [ShangHai Consonance Elec datasheet](docs/cn3702-datasheet.pdf) (11 pp, sha256 `c3d58229f9a0f8f3`, 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/cn3702-datasheet.pdf)

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