CN3387

@@ -0,0 +1,50 @@+# CN3387++**ShangHai Consonance Elec** · DC-DC Converters · SSOP-10++CN3387 from ShangHai Consonance Elec, in a SSOP-10. 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 | STAT | output | Charge status indicator output (CMOS). Drives high while charging and low when charging has terminated. Can sink/source approximately 10 mA to drive a status LED directly or interface to an MCU input. |+| 2 | CE | input | Chip enable input. A high level (>=2.2V) puts CN3387 in normal operation; a low level (<0.7V) disables the chip. Compatible with TTL and CMOS logic levels; do not leave in the 0.7V-2.2V undefined region. |+| 3 | FB | input | Battery voltage feedback input. Connects to an external resistor divider (R1/R2) to sense battery voltage per VBAT = VFB x (1 + R1/R2). Constant-current termination threshold Vcct = 1.125V typ; over-voltage / peak threshold 1.205V typ; recharge threshold 1.105V typ. |+| 4 | BAT | input | Battery positive-terminal sense input. Connects directly to the battery pack positive terminal for over-voltage protection (Vov = 1.285V typ threshold referred internally). Draws ~5.8 uA typical at VBAT = 12V. |+| 5 | GND | power_in | Device ground and return for both the input supply and the battery negative terminal. |+| 6 | LDRV | output | External low-side N-channel power MOSFET gate driver output. Sources/sinks up to ~0.65 A peak to switch the boost inductor low-side FET; VOH >= VCC-0.3V at 5 mA, VOL <= 0.3V at -5 mA. |+| 7 | HDRV | output | External high-side P-channel power MOSFET gate driver output for battery-short / low-battery protection topology (Figure 2). Sources/sinks up to ~0.8 A peak; VOH >= VCC-0.3V at 5 mA, VOL <= 0.3V at -5 mA. Leave unconnected when the external PMOS is not used (Figure 1 topology). |+| 8 | VIN | power_in | Positive supply input for the internal circuitry (2.7V to 6.5V) and also the positive input for the inductor current sense comparator. Quiescent current 300 uA typ (no switching); shutdown current 0 uA typ when CE is low. |+| 9 | CSN | input | Negative input of the inductor (input) current sense comparator. An external sense resistor Rcs is placed between VIN and CSN. In constant-current mode the upper (VIN-CSN) threshold is 125 mV typ and the lower threshold is 85 mV typ. |+| 10 | CT | passive | Timing-capacitor connection. A capacitor C2 (>1 nF) from CT to GND sets the maintenance-charge timeout per T(s) = 12.18e9 x C2. Timer starts when CN3387 enters top-off/maintenance mode and terminates charging on expiry. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | ShangHai Consonance Elec |+| Package | SSOP-10 |+| Category | PMIC |+| Pins | 10 |++## Ordering variants++- `CN3387`++## CAD (KiCad official)++- Symbol: `CN3387`+- Footprint: `Package_SO:SSOP-10_3.9x4.9mm_P1.00mm`+- 3D model: SSOP-10 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [ShangHai Consonance Elec datasheet](docs/cn3387-datasheet.pdf) (13 pp, sha256 `f6116a5972c222f1`, 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/cn3387-datasheet.pdf)

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