ap3125aktr-g1

@@ -0,0 +1,48 @@+# AP3125AKTR-G1++**Diodes Incorporated** · AC-DC Controllers and Regulators · SOT-26++AP3125AKTR-G1 from Diodes Incorporated, in a SOT-26. 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 | GND | power_in | Signal ground. Current return for driver and control circuits. |+| 2 | FB | input | Feedback input directly connected to opto-coupler. Input impedance ~15kΩ, sources ~0.27mA when pulled low; controls peak inductor current via IPK=(VFB-0.8)/(3·RS). VFB>4.5V for ~70ms triggers OLP hiccup; VFB<1.55V stops drive pulses (zero-duty threshold). Green-mode threshold ~2.1V. |+| 3 | CTRL | bidirectional | Latch trigger pin. Sources ~100μA; low-threshold trigger 1V (typ) and high-threshold trigger 3V (typ) invoke latch protection. Leave open if unused; connect an NTC thermistor to GND for external OTP protection. Max sourcing current must be limited below 5mA. |+| 4 | SENSE | input | Current sense input for primary MOSFET source current. Max sense voltage 0.95V (typ) with VFB=4.5V; FOCP threshold 1.7V (typ) with ~100ns delay; internal 250ns leading-edge blanking. Requires small RC filter/series resistor to protect against turn-off undershoot beyond -0.3V. |+| 5 | VCC | power_in | Supply voltage of driver and control circuits. Recommended 10-25V; UVLO(on)=15.8V typ, UVLO(off)=7.6V typ, VCC maintain ~9.1V, VCC OVP ~28.5V, internal clamp ~34V, absolute max 30V. Startup current ~1μA typ; operating current ~0.7-1.2mA. |+| 6 | GATE | output | Gate driver output for external power MOSFET. Output clamping voltage ~13V (typ), rise time ~150ns and fall time ~50ns into 1nF at VCC=13V, max output current 350mA. Max duty cycle 75% typ. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Diodes Incorporated |+| Package | SOT-26 |+| Category | PMIC |+| Pins | 6 |++## Ordering variants++- `AP3125AKTR-G1`+- `AP3125AKTR-G1VKTR-G1`+- `AP3125AKTR-G1LKTR-G1`+- `AP3125AKTR-G1RKTR-G1`++## CAD (KiCad official)++- Symbol: `AP3125AKTR-G1`+- Footprint: `Package_TO_SOT_SMD:SOT-23-6`+- 3D model: SOT-26 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/AP3125AKTR-G1.pdf) (None pp, sha256 `5c4b09361eff7f55`, retrieved 2026-08-17, tier: manufacturer)+- **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/ap3125aktr-g1-datasheet.pdf)

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