TX6120

@@ -0,0 +1,45 @@+# TX6120++**XDS** · LED Drivers · ESOP-8++TX6120 from XDS, in a ESOP-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 | GND | power_in | Ground return for the IC. Connect to the low side of the current-sense resistor R2 and to the system ground plane with a short, wide trace. |+| 2 | NC | unconnected | No connect. Leave floating (悬空不接). |+| 3 | DIM | input | Dimming input. Pulling DIM to GND disables the LED output; >1.3V forces 100% output. Supports both PWM dimming and linear dimming (linear range 0.3-1.25 V). Must not be left floating; a small cap (>=10nF) to GND is recommended in linear-dimming mode. |+| 4 | SW | output | Switch node. Internally connected to the drain of the 100V integrated power MOSFET (RDS(on) ≈ 150 mΩ at VGS=5V). Connect to the buck inductor and freewheeling diode. Exposed pad (EP) is also tied here. |+| 5 | CS | input | Current-sense input (peak current detection). Connect together with pin 6 to the top of the sense resistor R2. Peak trip threshold VCS_TH ≈ 255 mV (245-265 mV). |+| 6 | CS | input | Current-sense input (duplicate CS pin). Tied to pin 5 and to the top of the current-sense resistor R2 for peak-current control. |+| 7 | TOFF | input | Fixed off-time setting. Off-time is set by an external capacitor C1: TOFF = 0.51 × 150 kΩ × (C1 + 8 pF) + TD, with TD = 61 ns. If left unconnected, internal default off-time is 650 ns. |+| 8 | VDD | power_in | Supply input for the IC. Fed from VIN through a series resistor R1; an internal 5.5 V clamp/zener regulates VDD (max clamp current 10 mA). Operating input voltage range for the application 3.6-100 V (from VIN); UVLO ≈ 3.2 V with 0.5 V hysteresis; typical operating current 1.5 mA @ 200 kHz. |+| 9 | EP | output | Exposed thermal pad on the bottom of the ESOP-8. Internally connected to SW (MOS drain). Solder to the SW copper pour for heat dissipation; do NOT connect to GND. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | XDS |+| Package | ESOP-8 |+| Category | LED-drv |+| Pins | 9 |++## CAD (KiCad official)++- Symbol: `TX6120`+- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`+- 3D model: ESOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [XDS datasheet](docs/tx6120-datasheet.pdf) (7 pp, sha256 `a0dd331e5b699e8f`, 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/tx6120-datasheet.pdf)

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