component

AP3127B025MR

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by Ray

Wuxi Chipown Micro electronics LED Drivers, SOT-23-6L. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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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 (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