# DRV8824PWPR

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

DRV8824PWPR 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; connect 0.01-µF 50-V capacitor between CP1 and CP2. |
| 2 | CP2 | bidirectional | Charge pump flying capacitor; connect 0.01-µF 50-V capacitor between CP1 and CP2. |
| 3 | VCP | bidirectional | High-side gate drive voltage; connect 0.1-µF 16-V ceramic capacitor. |
| 4 | VMA | power_in | Bridge A motor power supply (8.2 to 45 V); bypass with 0.1-µF capacitor and bulk capacitance. |
| 5 | AOUT1 | output | Bridge A motor output 1; connect to stepper motor winding A. |
| 6 | ISENA | bidirectional | Bridge A current sense node; connect current sense resistor to measure winding A current. |
| 7 | AOUT2 | output | Bridge A motor output 2; positive current flows AOUT1 to AOUT2. |
| 8 | BOUT2 | output | Bridge B motor output 2; positive current flows BOUT1 to BOUT2. |
| 9 | ISENB | bidirectional | Bridge B current sense node; connect current sense resistor to measure winding B current. |
| 10 | BOUT1 | output | Bridge B motor output 1; connect to stepper motor winding B. |
| 11 | VMB | power_in | Bridge B motor power supply (8.2 to 45 V); bypass with 0.1-µF capacitor and bulk capacitance. |
| 12 | AVREF | input | Bridge A current set reference input (1 to 3.5 V); voltage source sets winding A current magnitude. |
| 13 | BVREF | input | Bridge B current set reference input (1 to 3.5 V); voltage source sets winding B current magnitude. |
| 14 | GND | power_in | Device ground; connect to system ground plane. |
| 15 | V3P3OUT | power_out | 3.3-V internal regulator output (3.18 to 3.42 V at 25°C); bypass with 0.47-µF capacitor. |
| 16 | nRESET | input | Active-low reset input; initializes step indexer and disables H-bridge driver outputs. |
| 17 | nSLEEP | input | Sleep mode control input; low enables sleep mode, high enables normal operation. |
| 18 | nFAULT | output | Open-drain active-low fault output; driven low for overtemperature or overcurrent faults. |
| 19 | DECAY | input | Decay mode selector input; low = slow decay, open = mixed decay, high = fast decay. |
| 20 | DIR | input | Direction input; determines motor step direction (forward or reverse). |
| 21 | nENBL | input | Active-low enable input; disables outputs and ignores STEP when driven high. |
| 22 | STEP | input | Step input; rising edge advances indexer one step in current mode. |
| 23 | NC | unconnected | No connect; leave this pin unconnected. |
| 24 | MODE0 | input | Microstep mode input 0; MODE0-2 select full, 1/2, 1/4, 1/8, 1/16, or 1/32 steps. |
| 25 | MODE1 | input | Microstep mode input 1; MODE0-2 select full, 1/2, 1/4, 1/8, 1/16, or 1/32 steps. |
| 26 | MODE2 | input | Microstep mode input 2; MODE0-2 select full, 1/2, 1/4, 1/8, 1/16, or 1/32 steps. |
| 27 | nHOME | output | Open-drain active-low home status output; driven low when indexer at home position. |
| 28 | GND | power_in | Device ground; connect to system ground plane. |
| 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: `DRV8824PWPR`
- Footprint: `Package_SO:TSSOP-28-1EP_4.4x9.7mm_P0.65mm_EP2.85x6.7mm`
- 3D model: HTSSOP-28 (KiCad packages3D, STEP)
- 3D model files: `drv8824pwpr-etched.step` / `drv8824pwpr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `drv8824pwpr.step` / `drv8824pwpr.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/drv8824) (38 pp, sha256 `9e017d4c2fe860a9`, retrieved 2026-09-21, 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-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/drv8824pwpr-datasheet.pdf)