# DRV8841PWPR

**Texas Instruments** · Stepper Motor Driver · HTSSOP-28

DRV8841PWPR from Texas Instruments, in a HTSSOP-28. 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 | CP1 | bidirectional | Charge pump flying capacitor node; requires 0.01-µF 50-V capacitor between CP1 and CP2. |
| 2 | CP2 | bidirectional | Charge pump flying capacitor node; requires 0.01-µF 50-V capacitor between CP1 and CP2. |
| 3 | VCP | bidirectional | High-side gate drive voltage; connect through 0.1-µF 16-V capacitor and 1-MΩ resistor to VM. |
| 4 | VMA | power_in | Bridge A motor power supply; accepts 8.2 V to 45 V with 0.1-µF bypass capacitor to GND per pin. |
| 5 | AOUT1 | output | Bridge A output 1; drives motor winding A with 2.5-A peak drive current. |
| 6 | ISENA | bidirectional | Bridge A current sense; connect external sense resistor for bridge A current regulation. |
| 7 | AOUT2 | output | Bridge A output 2; drives motor winding A with 2.5-A peak drive current. |
| 8 | BOUT2 | output | Bridge B output 2; drives motor winding B with 2.5-A peak drive current. |
| 9 | ISENB | bidirectional | Bridge B current sense; connect external sense resistor for bridge B current regulation. |
| 10 | BOUT1 | output | Bridge B output 1; drives motor winding B with 2.5-A peak drive current. |
| 11 | VMB | power_in | Bridge B motor power supply; accepts 8.2 V to 45 V with 0.1-µF bypass capacitor to GND per pin. |
| 12 | AVREF | input | Bridge A reference voltage input; accepts 1 V to 3.5 V for current threshold setting (0 V to 1 V acceptable with degraded accuracy). |
| 13 | BVREF | input | Bridge B reference voltage input; accepts 1 V to 3.5 V for current threshold setting (0 V to 1 V acceptable with degraded accuracy). |
| 14 | GND | power_in | Device ground reference; return path for all signals. |
| 15 | V3P3OUT | power_out | 3.3-V regulator output; provides 3.2 V to 3.4 V at 0 to 1-mA output current, bypass with 0.47-µF 6.3-V capacitor. |
| 16 | nRESET | input | Active-low reset input; resets internal logic and disables H-bridge outputs when low. |
| 17 | nSLEEP | input | Sleep mode control input; logic high enables device, logic low enters low-power sleep mode. |
| 18 | nFAULT | tri_state | Open-drain fault output; pulled low on overtemperature or overcurrent protection event. |
| 19 | DECAY | input | Decay mode control input; low = slow decay, open = mixed decay, high = fast decay. |
| 20 | AIN2 | input | Bridge A input 2; logic level controls AOUT2 output state. |
| 21 | AIN1 | input | Bridge A input 1; logic level controls AOUT1 output state. |
| 22 | BIN1 | input | Bridge B input 1; logic level controls BOUT1 output state. |
| 23 | BIN2 | input | Bridge B input 2; logic level controls BOUT2 output state. |
| 24 | AI0 | input | Bridge A current setting bit 0; sets current level with AI1 (00=100%, 01=71%, 10=38%, 11=0%). |
| 25 | AI1 | input | Bridge A current setting bit 1; sets current level with AI0 (00=100%, 01=71%, 10=38%, 11=0%). |
| 26 | BI0 | input | Bridge B current setting bit 0; sets current level with BI1 (00=100%, 01=71%, 10=38%, 11=0%). |
| 27 | BI1 | input | Bridge B current setting bit 1; sets current level with BI0 (00=100%, 01=71%, 10=38%, 11=0%). |
| 28 | GND | power_in | Device ground reference (PowerPAD); return path and thermal pad. |
| 29 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-28 |
| Category | Motor Driver ICs |
| Pins | 29 |

## CAD (KiCad official)

- Symbol: `DRV8841PWPR`
- Footprint: `Package_SO:TSSOP-28-1EP_4.4x9.7mm_P0.65mm_EP2.85x6.7mm`
- 3D model: HTSSOP-28 (KiCad packages3D, STEP)
- 3D model files: `drv8841pwpr-etched.step` / `drv8841pwpr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `drv8841pwpr.step` / `drv8841pwpr.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/drv8841) (32 pp, sha256 `41ed628a530332e4`, retrieved 2026-09-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/drv8841pwpr-datasheet.pdf)