TM1805

@@ -0,0 +1,44 @@+# TM1805++**TM Shenzhen Titan Micro Elec** · LED Drivers · SOP-8++TM1805 from TM Shenzhen Titan Micro Elec, in a SOP-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 | VDD24V | power_in | Built-in 24V shunt (zener) regulator input. Requires an external series resistor and filter capacitor for resistor-capacitor (dropper) supply operation. Typical VZ24 ≈ 23V with a 300Ω series resistor. |+| 2 | VDD | power_in | Chip logic supply input with built-in 5V shunt regulator. Recommended operating range 3.3-6.0V, typical 5.0V; typical no-load current 0.25mA. |+| 3 | FIN | input | Frequency input for pattern-change timing and inter-chip synchronization. Accepts <4kHz sine/square/triangle, amplitude 3.5-5V. Tied to VDD or GND holds the current pattern; leaving it floating produces undefined behavior. VHIN ≈ 3.4V, VLIN ≈ 1.5V. |+| 4 | SET | input | Display mode select. Floating: jump + fade sequence. Tied to VDD: jump-only cycle. Tied to GND: fade-only cycle. Typical sink current 15µA at 5V. |+| 5 | B | output | Blue channel open-drain N-MOS output. Constant-voltage LED driver rated to 24V, typical sink current 82mA at VOUTn=1.2V, on-resistance ≈14Ω. PWM frequency ≈17.8kHz. |+| 6 | G | output | Green channel open-drain N-MOS output. Constant-voltage LED driver rated to 24V, typical sink current 82mA at VOUTn=1.2V, on-resistance ≈14Ω. PWM frequency ≈17.8kHz. |+| 7 | R | output | Red channel open-drain N-MOS output. Constant-voltage LED driver rated to 24V, typical sink current 82mA at VOUTn=1.2V, on-resistance ≈14Ω. PWM frequency ≈17.8kHz. |+| 8 | GND | power_in | Logic ground reference. All voltages are measured with respect to this pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | TM Shenzhen Titan Micro Elec |+| Package | SOP-8 |+| Category | LED-drv |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `TM1805`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [TM Shenzhen Titan Micro Elec datasheet](docs/tm1805-datasheet.pdf) (8 pp, sha256 `b8c70f77b97f828f`, 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](docs/tm1805-datasheet.pdf)

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