al3353s-13

@@ -0,0 +1,47 @@+# AL3353S-13++**Diodes Incorporated** · LED Drivers · SOIC-8++AL3353S-13 from Diodes Incorporated, in a SOIC-8. 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 | VIN | power_in | Power supply input. Operating range 9 V to 40 V (absolute max 43 V). Internally supplies the 5 V LDO and gate driver; UVLO turn-on 8.3 V typ with 800 mV hysteresis. A decoupling capacitor should be placed close to this pin. |+| 2 | GATE | output | Gate drive output for the external boost power N-MOSFET. Typical output amplitude ~13 V at VIN = 24 V, with ~40 ns rise / ~20 ns fall into 1 nF. Absolute max −0.3 V to 43 V. |+| 3 | GND | power_in | Device ground / return for the internal analog, logic, and gate-driver circuits. Tie to the system ground plane; grounds of the OVP divider and compensation network should return here. |+| 4 | CS | input | Current-sense input from the MOSFET source resistor for peak-current-mode control. Cycle-by-cycle OCP threshold ≈500 mV (typ, at 90% duty); diode/inductor short protection latches if CS exceeds ~1.2 V for 17 consecutive cycles. Absolute max −0.3 V to 7 V. An external slope-compensation resistor RSL can be inserted in this path. |+| 5 | FB | input | LED current feedback input to the error amplifier. Regulates the voltage across the external LED-current sense resistor to VFB = 400 mV ±1.5 % (394/400/406 mV). Absolute max −0.3 V to 7 V; ILED[mA] ≈ 400 mV·DUTY / RFB. |+| 6 | COMP | output | Boost converter loop compensation node - output of the internal gm error amplifier (gm ≈ 100 µA/V, Isource 30 µA / Isink 60 µA). Connect an external RC network to GND close to the pin. Latches GATE off if VCOMP > 3.2 V for 37 ms (FB-short / LED-cathode-short protection). Absolute max −0.3 V to 7 V. |+| 7 | OVP | input | Overvoltage-protection sense input from an external resistor divider on the boost output. Triggers OVP at ~2.0 V (VOUT_OVP = (R4+R5)/R5 · 2 V). Also monitors VOUT-short (trips when < ~0.25 V normal / 150 mV at startup). Absolute max −0.3 V to 43 V; protection is latched and cleared via VIN or PWM. |+| 8 | PWM | input | PWM signal input for analog dimming / enable. Internally pulled to GND via ~220 kΩ. Logic high ≥ 2.5 V enables the device; logic low ≤ 1.2 V for > 20 ms puts it in standby (~130 µA). Supported PWM frequency 5 kHz to 50 kHz; absolute max −0.3 V to 7 V (relaxed to −5 V for <100 ns pulses). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Diodes Incorporated |+| Package | SOIC-8 |+| Category | LED-drv |+| Pins | 8 |++## Ordering variants++- `AL3353S-13S-13`++## CAD (KiCad official)++- Symbol: `AL3353S-13`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Diodes Incorporated datasheet](docs/al3353s-13-datasheet.pdf) (None pp, sha256 `94de5ab3928b5b1f`, 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/al3353s-13-datasheet.pdf)

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