CN3717

@@ -0,0 +1,55 @@+# CN3717++**ShangHai Consonance Elec** · Battery Management · TSSOP-16++CN3717 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 driver circuitry. Connect a 100nF capacitor between VG and VCC. |+| 2 | PGND | power_in | Power ground return for the gate-driver and high-current internal paths. |+| 3 | GND | power_in | Analog signal ground for the internal reference, control and sensing circuitry. |+| 4 | CHRG | output | Open-drain charge status output (active-low, bar-CHRG). Pulled low during trickle, constant-current and over-charge states; high-impedance otherwise. Sinks 7-18mA (typ 12mA) at VCHRG=1V; leakage <=1uA at 25V. |+| 5 | DONE | output | Open-drain end-of-charge status output (active-low, bar-DONE). Pulled low in float-charge state, high-impedance otherwise. Sinks 7-18mA (typ 12mA) at VDONE=1V; leakage <=1uA at 25V. |+| 6 | TEMP | input | Battery-temperature sense input. Connect an NTC thermistor (approx 10k at 25C) from TEMP to GND. Internal ~50uA pull-up; comparator thresholds Vthh=1.61V (typ) and Vthl=0.175V (typ) define allowed temperature window. Temperature-abnormal shutdown only active during trickle, constant-current and over-charge phases. |+| 7 | EOC | input | End-of-charge current program input. Connect directly to GND or through an external resistor Rext (<=100k) to set the over-charge termination current: IEOC = 1.278*(14350+Rext) / (RCS*1e6). IEOC/ICH ranges from 10.5% (Rext=0) to 83.5% (Rext=100k). |+| 8 | COM1 | passive | Loop compensation input 1. Connect a 470pF ceramic capacitor from COM1 to GND for control-loop stability. |+| 9 | COM2 | passive | Loop compensation input 2. Connect a 120 ohm resistor in series with a 220nF ceramic capacitor from COM2 to GND. |+| 10 | FB | input | Battery-voltage feedback input. External resistor divider (R6/R7) from BAT to FB to GND sets the over-charge and float voltages: VBAT = 3.69*(1+R7/R6) + IB*R7, with IB (FB bias current) approx 40nA typ (260nA max). Max settable over-charge voltage 25V. |+| 11 | COM3 | passive | Loop compensation input 3. Connect a 100nF capacitor from COM3 to GND. Absolute max voltage on COM3 to GND is 6.5V. |+| 12 | NC | unconnected | No internal connection. |+| 13 | CSP | input | Positive input of the charge-current sense amplifier. Measures the voltage across the current-sense resistor RCS placed between CSP and BAT; feeds the internal current regulation loop. Constant-current threshold VCS(CSP-BAT) = 120mV typ (113-127mV); trickle-mode threshold 23mV typ. Absolute max 28V. |+| 14 | BAT | input | Negative input of the charge-current sense amplifier and battery-terminal connection. Measures VRCS together with CSP; typical DC current into pin approx 10uA (VBAT=12V). Absolute max 28V. |+| 15 | VCC | power_in | Main supply / external power input, also the supply for internal circuitry. Operating range 7.5V to 28V; UVLO rising threshold 4.2-7.3V (typ 6V). Requires a local filter/bulk capacitor to GND. |+| 16 | DRV | output | Gate-drive output for the external P-channel MOSFET. VH = VCC-60mV (at IDRV=-10mA); VL = VCC-6.5V typ (5-8V) at IDRV=0. Rise/fall times ~40ns typ into 2nF load. Internal clamp keeps VCC-VDRV below 8V max so low-Vgs P-MOSFETs may be used. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | ShangHai Consonance Elec |+| Package | TSSOP-16 |+| Category | PMIC |+| Pins | 16 |++## Ordering variants++- `CN3717`++## CAD (KiCad official)++- Symbol: `CN3717`+- 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/cn3717-datasheet.pdf) (11 pp, sha256 `6a59b77def44b583`, retrieved 2026-08-17, tier: lcsc)+- **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/cn3717-datasheet.pdf)

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