component
LP8861QPWPRQ1
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.
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
markdownLP8861QPWPRQ1
Texas Instruments · LED Drivers · HTSSOP-20-EP
LP8861QPWPRQ1 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 power pin operating from 4.5 V to 40 V, also serving as positive input for optional current-sense resistor. |
| 2 | LDO | output | Output of internal low-dropout regulator; 1-μF decoupling capacitor must be connected between this pin and noise-free ground. |
| 3 | FSET | input | Boost/SEPIC switching frequency setting controlled by resistor value from 24 kΩ to 219 kΩ connected between this pin and ground. |
| 4 | VDDIO/EN | power_in | Enable input for the device and supply input for digital pins. |
| 5 | FAULT | tri_state | Open-drain fault signal output; may be left floating if unused. |
| 6 | SYNC | input | Synchronization input for boost/SEPIC converter; connect to GND to disable spread spectrum or to VDDIO/EN to enable spread spectrum. |
| 7 | PWM | input | PWM dimming input for LED brightness control. |
| 8 | TSENSE | input | Input for NTC thermistor bridge circuit for temperature sensing; must be left floating if unused. |
| 9 | TSET | input | Reference input for NTC thermistor bridge circuit; must be connected to GND if not used. |
| 10 | ISET | input | LED current setting input controlled by resistor value from 24 kΩ to 129 kΩ connected between this pin and ground. |
| 11 | GND | power_in | Ground reference pin. |
| 12 | OUT4 | output | LED current sink output channel 4; must be connected to GND if unused. |
| 13 | OUT3 | output | LED current sink output channel 3; must be connected to GND if unused. |
| 14 | OUT2 | output | LED current sink output channel 2; must be connected to GND if unused. |
| 15 | OUT1 | output | LED current sink output channel 1; must be connected to GND if unused. |
| 16 | FB | input | Feedback input for boost/SEPIC converter; must be connected to middle of resistor divider between VOUT and ground using feedback resistor values from 5 kΩ to 150 kΩ. |
| 17 | PGND | power_in | Boost/SEPIC converter power ground. |
| 18 | SW | output | Boost/SEPIC switching node connected to internal power FET and external inductor/diode. |
| 19 | SD | output | Power-line FET gate drive output for external MOSFET control; may be left floating if unused. |
| 20 | VSENSE_N | input | Input current sense pin; connect to VIN when optional input current-sense resistor is not used. |
| 21 | EP | 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:
LP8861QPWPRQ1 - Footprint:
Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm - 3D model: HTSSOP-20-EP (KiCad packages3D, STEP)
- 3D model files:
lp8861qpwprq1-etched.step/lp8861qpwprq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lp8861qpwprq1.step/lp8861qpwprq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (43 pp, sha256
ad8ad167d60c5bfc, retrieved 2026-10-01, 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: 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).