# TPS61194PWPRQ1

**Texas Instruments** · LED Drivers · HTSSOP-20-EP

TPS61194PWPRQ1 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. |
| 2 | LDO | power_out | Output of internal LDO; connect a 1-μF decoupling capacitor between this pin and noise-free GND. |
| 3 | FSET | input | DC-DC (boost or SEPIC) switching frequency setting resistor; for normal operation, resistor value from 24 kΩ to 219 kΩ must be connected between this pin and ground. |
| 4 | VDDIO/EN | power_in | Enable input for the device as well as supply input (VDDIO) for digital pins. |
| 5 | FAULT | output | Fault signal output; if unused, the pin may be left floating. |
| 6 | SYNC | input | Input for synchronizing boost; if synchronization is not used, connect this pin to GND to disable spread spectrum or to VDDIO/EN to enable spread spectrum. |
| 7 | PWM | input | PWM dimming input. |
| 8 | NC | unconnected | No connect. |
| 9 | GND | power_in | Ground. |
| 10 | ISET | input | LED current setting resistor; for normal operation, resistor value from 24 kΩ to 129 kΩ must be connected between this pin and ground. |
| 11 | GND | power_in | Ground. |
| 12 | OUT4 | output | Current sink output; this pin must be connected to GND if not used. |
| 13 | OUT3 | output | Current sink output; this pin must be connected to GND if not used. |
| 14 | OUT2 | output | Current sink output; this pin must be connected to GND if not used. |
| 15 | OUT1 | output | Current sink output; this pin must be connected to GND if not used. |
| 16 | FB | input | DC-DC (boost or SEPIC) feedback input; for normal operation this pin must be connected to the middle of a resistor divider between VOUT and ground using feedback resistor values from 5 kΩ to 150 kΩ. |
| 17 | PGND | power_in | DC-DC (boost or SEPIC) power ground. |
| 18 | SW | output | DC-DC (boost or SEPIC) switch pin. |
| 19 | NC | unconnected | No connect. |
| 20 | VIN | power_in | Input power pin. |
| 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: `TPS61194PWPRQ1`
- 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: `tps61194pwprq1-etched.step` / `tps61194pwprq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps61194pwprq1.step` / `tps61194pwprq1.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/tps61194-q1) (35 pp, sha256 `c2b5f35576d14f00`, retrieved 2026-10-05, 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`, primary `claude-haiku-4-5-20251001` (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/tps61194pwprq1-datasheet.pdf)