# TPS92638QPWPRQ1

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

TPS92638QPWPRQ1 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 | SUPPLY | power_in | Input power supply terminal accepts 5V to 40V automotive battery voltage |
| 2 | EN | input | Logic input for device enable and shutdown control with internal pulldown resistor |
| 3 | STOP | input | Logic signal input to control stop light LED current setting with internal pulldown |
| 4 | PWM1 | input | PWM input and ON-OFF control for LED output channels 1 and 2 with internal pulldown |
| 5 | PWM2 | input | PWM input and ON-OFF control for LED output channels 3 and 4 with internal pulldown |
| 6 | PWM3 | input | PWM input and ON-OFF control for LED output channels 5 and 6 with internal pulldown |
| 7 | PWM4 | input | PWM input and ON-OFF control for LED output channels 7 and 8 with internal pulldown |
| 8 | FAULT | tri_state | Open-drain fault output pin for LED open-load, short-circuit, and thermal shutdown fault reporting |
| 9 | TEMP | input | Temperature monitoring input for thermal foldback threshold programming, tie to ground to disable |
| 10 | REFHI | input | Reference resistor terminal for stop light LED current setting |
| 11 | REF | input | Reference resistor terminal for normal tail light LED current setting |
| 12 | GND | power_in | Ground reference connection |
| 13 | IOUT8 | output | LED constant current output channel 8, maximum 70mA per channel |
| 14 | IOUT7 | output | LED constant current output channel 7, maximum 70mA per channel |
| 15 | IOUT6 | output | LED constant current output channel 6, maximum 70mA per channel |
| 16 | IOUT5 | output | LED constant current output channel 5, maximum 70mA per channel |
| 17 | IOUT4 | output | LED constant current output channel 4, maximum 70mA per channel |
| 18 | IOUT3 | output | LED constant current output channel 3, maximum 70mA per channel |
| 19 | IOUT2 | output | LED constant current output channel 2, maximum 70mA per channel |
| 20 | IOUT1 | output | LED constant current output channel 1, maximum 70mA per channel |
| 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: `TPS92638QPWPRQ1`
- 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: `tps92638qpwprq1-etched.step` / `tps92638qpwprq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps92638qpwprq1.step` / `tps92638qpwprq1.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/tps92638-q1) (38 pp, sha256 `162ec04862fafd17`, 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 0.2`, 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/tps92638qpwprq1-datasheet.pdf)