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LM3424QMHX
Public Made by Adomby adom
Texas Instruments LED Drivers, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+57@@ -0,0 +1,57 @@+# LM3424QMHX++**Texas Instruments** · LED Drivers · HTSSOP-20-EP++LM3424QMHX from Texas Instruments, in a HTSSOP-20-EP. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VIN | power_in | Input voltage pin; bypass with a 100 nF capacitor to GND as close to the device as possible. |+| 2 | EN | input | Enable pin; connect to more than 2.4 V to enable the device or to less than 0.8 V for low-power shutdown. |+| 3 | COMP | input | Compensation pin; connect a capacitor to GND to compensate the control loop. |+| 4 | CSH | input | Current sense high; connect a resistor to GND to set the signal current, which can also be used for analog dimming. |+| 5 | RT | input | Resistor timing; connect a resistor to GND to set the switching frequency, which can also be synchronized to an external clock. |+| 6 | nDIM | input | Dimming input and under-voltage protection; accepts a PWM dimming signal and/or a resistor divider from VIN to program input undervoltage lockout. |+| 7 | SS | input | Soft-start; connect a capacitor to GND to extend start-up time. |+| 8 | TGAIN | input | Temperature foldback gain; connect a resistor to GND to set the foldback slope. |+| 9 | TSENSE | input | Temperature sense input; connect a resistor/thermistor divider from VS to sense temperature. |+| 10 | TREF | input | Temperature foldback reference; connect a resistor divider from VS to set the foldback reference voltage. |+| 11 | VS | power_in | 2.45 V voltage reference for the temperature foldback circuit and other external circuitry. |+| 12 | OVP | input | Over-voltage protection; connect a resistor divider from VO to program the output over-voltage lockout. |+| 13 | DDRV | output | Dimming gate drive output; connect to the gate of the dimming MOSFET. |+| 14 | GND | power_in | Ground; connect to DAP to provide proper system GND. |+| 15 | GATE | output | Main gate drive output; connect to the gate of the main switching MOSFET. |+| 16 | VCC | power_in | Internal regulator output; bypass with a 2.2 µF to 3.3 µF ceramic capacitor to GND. |+| 17 | IS | input | Main switch current sense; connect to the drain of the main N-channel MOSFET for RDS-ON sensing or to a sense resistor in its source. |+| 18 | SLOPE | input | Slope compensation; connect a resistor to GND to set the slope of the additional ramp. |+| 19 | HSN | input | LED current sense negative; connect through a series resistor to the negative side of the LED current sense resistor. |+| 20 | HSP | input | LED current sense positive; connect through a series resistor to the positive side of the LED current sense resistor. |+| 21 | DAP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | HTSSOP-20-EP |+| Category | Nixie Tube Driver/LED Driver |+| Pins | 21 |++## CAD (KiCad official)++- Symbol: `LM3424QMHX`+- Footprint: `Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm`+- 3D model: HTSSOP-20-EP, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.2 mm nominal TSSOP height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)+- 3D model files: `lm3424qmhx-etched.step` / `lm3424qmhx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm3424qmhx.step` / `lm3424qmhx.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm3424-q1) (69 pp, sha256 `d97444a162985e8c`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/lm3424qmhx-datasheet.pdf)
page.jsonadded+277@@ -0,0 +1,277 @@+{+ "slug": "lm3424qmhx",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments LED Drivers, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "nixie tube driver-led driver",+ "lm3424qmhx",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm3424qmhx.kicad_sym",+ "lm3424qmhx.kicad_mod",+ "lm3424qmhx.glb",+ "lm3424qmhx.step",+ "lm3424qmhx.lbr",+ "docs/hero.png",+ "docs/lm3424qmhx-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "lm3424qmhx-hero.glb",+ "lm3424qmhx-hero.overlay.json"+ ],+ "component": {+ "mpn": "LM3424QMHX",+ "manufacturer": "Texas Instruments",+ "package": "HTSSOP-20-EP",+ "pin_count": 21,+ "category": "Nixie Tube Driver/LED Driver",+ "subcategory": "LED Drivers",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lm3424-q1",+ "parts": {+ "symbol": "lm3424qmhx.kicad_sym",+ "footprint": "lm3424qmhx.kicad_mod",+ "model_3d": "lm3424qmhx-hero.glb",+ "model_3d_plain": "lm3424qmhx.glb",+ "model_3d_step": "lm3424qmhx-etched.step",+ "model_3d_step_plain": "lm3424qmhx.step",+ "lbr": "lm3424qmhx.lbr"+ },+ "distributor_links": {+ "lcsc": "C701844"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T04:17:34Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": null,+ "status": "no match"+ },+ "mouser": {+ "pn": null,+ "status": "no match"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "VIN",+ "type": "power_in",+ "description": "Input voltage pin; bypass with a 100 nF capacitor to GND as close to the device as possible."+ },+ {+ "number": "2",+ "name": "EN",+ "type": "input",+ "description": "Enable pin; connect to more than 2.4 V to enable the device or to less than 0.8 V for low-power shutdown."+ },+ {+ "number": "3",+ "name": "COMP",+ "type": "input",+ "description": "Compensation pin; connect a capacitor to GND to compensate the control loop."+ },+ {+ "number": "4",+ "name": "CSH",+ "type": "input",+ "description": "Current sense high; connect a resistor to GND to set the signal current, which can also be used for analog dimming."+ },+ {+ "number": "5",+ "name": "RT",+ "type": "input",+ "description": "Resistor timing; connect a resistor to GND to set the switching frequency, which can also be synchronized to an external clock."+ },+ {+ "number": "6",+ "name": "nDIM",+ "type": "input",+ "description": "Dimming input and under-voltage protection; accepts a PWM dimming signal and/or a resistor divider from VIN to program input undervoltage lockout."+ },+ {+ "number": "7",+ "name": "SS",+ "type": "input",+ "description": "Soft-start; connect a capacitor to GND to extend start-up time."+ },+ {+ "number": "8",+ "name": "TGAIN",+ "type": "input",+ "description": "Temperature foldback gain; connect a resistor to GND to set the foldback slope."+ },+ {+ "number": "9",+ "name": "TSENSE",+ "type": "input",+ "description": "Temperature sense input; connect a resistor/thermistor divider from VS to sense temperature."+ },+ {+ "number": "10",+ "name": "TREF",+ "type": "input",+ "description": "Temperature foldback reference; connect a resistor divider from VS to set the foldback reference voltage."+ },+ {+ "number": "11",+ "name": "VS",+ "type": "power_in",+ "description": "2.45 V voltage reference for the temperature foldback circuit and other external circuitry."+ },+ {+ "number": "12",+ "name": "OVP",+ "type": "input",+ "description": "Over-voltage protection; connect a resistor divider from VO to program the output over-voltage lockout."+ },+ {+ "number": "13",+ "name": "DDRV",+ "type": "output",+ "description": "Dimming gate drive output; connect to the gate of the dimming MOSFET."+ },+ {+ "number": "14",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; connect to DAP to provide proper system GND."+ },+ {+ "number": "15",+ "name": "GATE",+ "type": "output",+ "description": "Main gate drive output; connect to the gate of the main switching MOSFET."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Internal regulator output; bypass with a 2.2 µF to 3.3 µF ceramic capacitor to GND."+ },+ {+ "number": "17",+ "name": "IS",+ "type": "input",+ "description": "Main switch current sense; connect to the drain of the main N-channel MOSFET for RDS-ON sensing or to a sense resistor in its source."+ },+ {+ "number": "18",+ "name": "SLOPE",+ "type": "input",+ "description": "Slope compensation; connect a resistor to GND to set the slope of the additional ramp."+ },+ {+ "number": "19",+ "name": "HSN",+ "type": "input",+ "description": "LED current sense negative; connect through a series resistor to the negative side of the LED current sense resistor."+ },+ {+ "number": "20",+ "name": "HSP",+ "type": "input",+ "description": "LED current sense positive; connect through a series resistor to the positive side of the LED current sense resistor."+ },+ {+ "number": "21",+ "name": "DAP",+ "type": "passive",+ "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: The DAP (exposed thermal pad) is not a numbered pin in the datasheet pin table; it is listed as 'DAP; Pin types are taken from the datasheet's I/O column (I/O/input/output). Pin 14 GND and the DAP are t; Only the pin table on page 3 was provided in this excerpt. The top-view drawing on that page has gar",+ "exposed pad 21 added from the footprint",+ "dropped thermal pad ['EP'] absent from footprint"+ ],+ "pages_sent": 10,+ "cost_usd": 0.0726,+ "at": "2026-10-08T04:17:08"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm3424-q1",+ "pages": 69,+ "sha256": "d97444a162985e8c",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 21,+ "described": 21,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "lm3424qmhx.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.41,+ 6.5,+ 1.2+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "1c41aa2a06fa2ba9a47c650f53ae8f319c04ccd268888d442b156533c4f77f5a",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "lm3424qmhx-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6.41,+ 6.5,+ 1.2+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "0916d0d3b10c3fb12e1e8b9c11990b27b32b54f0b56884484c250f3957415cfd",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}