AP3127B025MR

@@ -0,0 +1,46 @@+# AP3127B025MR++**Wuxi Chipown Micro electronics** · LED Drivers · SOT-23-6L++AP3127B025MR from Wuxi Chipown Micro electronics, in a SOT-23-6L. 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 | LX | output | Switching node. Drain of the internal 0.8 Ω N-MOS boost switch; connect to the boost inductor and the anode of the Schottky rectifier. Absolute max 28 V, peak current up to 1.3 A (1.0 A typical limit). |+| 2 | VSS | power_in | Device ground return (0 V reference for all internal circuitry and the low side of the internal power MOSFET). |+| 3 | FB | input | Voltage feedback input for the current-regulation loop. Regulated to VFB = 0.25 V (0.235-0.265 V); tie to the top of the LED-current sense resistor (RLED = VFB / ILED, e.g. 12.5 Ω for 20 mA). Input leakage ±0.1 µA typ. |+| 4 | CE | input | Chip enable / PWM dimming input. VIH ≥ 1.4 V enables the converter; VIL ≤ 0.5 V shuts it down (ISTB ≈ 1 µA). Driving CE with a 100 Hz-10 kHz PWM signal varies LED brightness via duty cycle. Input current ≤ 1 µA. |+| 5 | OVP | input | Over-voltage protection sense input. Monitors the boost output; internal LX overvoltage threshold is 23-27 V (25 V typ). Typically connected to the boosted output rail (CL) to shut the switch off if the LED string opens. |+| 6 | VIN | power_in | Supply input, 2.5 V to 6.0 V (absolute max 7 V). Bypass locally with a 1 µF ceramic capacitor to VSS. Powers the internal control, oscillator, and gate driver. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Wuxi Chipown Micro electronics |+| Package | SOT-23-6L |+| Category | LED-drv |+| Pins | 6 |++## Ordering variants++- `AP3127B025MR`++## CAD (KiCad official)++- Symbol: `AP3127B025MR`+- Footprint: `Package_TO_SOT_SMD:SOT-23-6`+- 3D model: SOT-23-6L (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Wuxi Chipown Micro electronics datasheet](docs/ap3127b025mr-datasheet.pdf) (6 pp, sha256 `42471f568f433dc7`, 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/ap3127b025mr-datasheet.pdf)

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