component
LM3445MMX
Public Made by Adomby adom
Texas Instruments LED Drivers, VSSOP-10-0.5mm. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM3445MMX
Texas Instruments · LED Drivers · VSSOP-10-0.5mm
LM3445MMX from Texas Instruments, in a VSSOP-10-0.5mm. 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 | ASNS | output | PWM output of TRIAC dim decoder circuit with 0-4 V range; duty cycle proportional to dimmer on-time. |
| 2 | FLTR1 | input | First filter input; 120-Hz PWM signal compared to 1-3 V, 5.85-kHz ramp to generate proportional frequency PWM. |
| 3 | DIM | bidirectional | Input/output dual function dim pin; can be driven with external PWM or used as output to other drivers; pull above 4.9 V to tri-state. |
| 4 | COFF | input | OFF time setting pin; user-set RC network connected to this pin sets constant OFF time of switching controller. |
| 5 | FLTR2 | input | Second filter input; capacitor filters PWM dimming signal to provide DC voltage for LED current control or analog dimming. |
| 6 | GND | power_in | Circuit ground connection and power return path. |
| 7 | ISNS | input | LED current sense input; external resistor from MOSFET source to GND through this pin sets maximum LED current. |
| 8 | GATE | output | Power MOSFET driver output; provides gate drive for power switching MOSFET of buck controller. |
| 9 | VCC | power_in | Input voltage pin; supplies 8-12 V to internal control circuitry and gate driver. |
| 10 | BLDR | input | Bleeder pin with internal switched 230-Ω resistor; provides input path and current for proper TRIAC dimmer firing. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-10-0.5mm |
| Category | LED Drivers |
| Pins | 10 |
CAD (KiCad official)
- Symbol:
LM3445MMX - Footprint:
Package_SO:MSOP-10_3x3mm_P0.5mm - 3D model: VSSOP-10-0.5mm (KiCad packages3D, STEP)
- 3D model files:
lm3445mmx-etched.step/lm3445mmx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm3445mmx.step/lm3445mmx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (46 pp, sha256
e690e402245bfa5e, retrieved 2026-10-07, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).