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DRV8825PWPR

Public Made by Adom

by adom

Texas Instruments Stepper Motor Driver, HTSSOP-28-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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DRV8825PWPR

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

DRV8825PWPR from Texas Instruments, in a HTSSOP-28-EP. 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 connection; connect 0.01-μF 50-V capacitor between CP1 and CP2.
2 CP2 bidirectional Charge pump flying capacitor connection; connect 0.01-μF 50-V capacitor between CP1 and CP2.
3 VCP bidirectional High-side gate drive voltage supply; connect 0.1-μF 16-V ceramic capacitor and 1-MΩ resistor between VCP and VMA.
4 VMA power_in Bridge A motor power supply input (8.2 to 45 V); bypass with 0.1-μF capacitor to GND.
5 AOUT1 output Bridge A output 1; connect to bipolar stepper motor winding A.
6 ISENA bidirectional Bridge A current sense and ground connection; connect current sense resistor to measure winding current.
7 AOUT2 output Bridge A output 2; positive current flows from AOUT1 to AOUT2.
8 BOUT2 output Bridge B output 2; positive current flows from BOUT1 to BOUT2.
9 ISENB bidirectional Bridge B current sense and ground connection; connect current sense resistor to measure winding current.
10 BOUT1 output Bridge B output 1; connect to bipolar stepper motor winding B.
11 VMB power_in Bridge B motor power supply input (8.2 to 45 V); bypass with 0.47-μF 6.3-V ceramic capacitor to GND.
12 AVREF input Bridge A current set reference input (1 to 3.5 V); sets maximum motor winding current via external resistor divider.
13 BVREF input Bridge B current set reference input (1 to 3.5 V); sets maximum motor winding current via external resistor divider.
14 GND power_in Device ground.
15 V3P3OUT output 3.3-V internal regulator output (0 to 1 mA load current); supplies internal reference and can power external logic.
16 nRESET input Active-low reset input with 100-kΩ internal pulldown; resets indexer to home position and disables H-bridge outputs.
17 nSLEEP input Sleep mode control input with 1-MΩ internal pulldown; logic high for normal operation, logic low for sleep mode.
18 nFAULT tri_state Open-drain fault output; pulled low on overcurrent, thermal shutdown, or undervoltage lockout condition.
19 DECAY input Decay mode selection input with ~130-kΩ internal pullup and ~80-kΩ pulldown; logic low = slow decay, floating = mixed decay, logic high = fast decay.
20 DIR input Direction input with 100-kΩ internal pulldown; determines stepper motor rotation direction with each STEP pulse.
21 nENBL input Active-high enable input with 100-kΩ internal pulldown; logic low enables H-bridges and indexer, logic high disables.
22 STEP input Step pulse input with 100-kΩ internal pulldown; rising edge advances indexer by one step state.
23 NC unconnected No connect pin; leave unconnected.
24 MODE0 input Microstep mode select bit 0 with 100-kΩ internal pulldown; combined with MODE1/MODE2 sets resolution from full step to 1/32 step.
25 MODE1 input Microstep mode select bit 1 with 100-kΩ internal pulldown; combined with MODE0/MODE2 sets resolution from full step to 1/32 step.
26 MODE2 input Microstep mode select bit 2 with 100-kΩ internal pulldown; combined with MODE0/MODE1 sets resolution from full step to 1/32 step.
27 nHOME tri_state Open-drain home position output; logic low when indexer is at 45° home position state.
28 GND power_in Device ground and thermal pad connection.
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-EP
Category Motor Driver ICs
Pins 29

CAD (KiCad official)

  • Symbol: DRV8825PWPR
  • Footprint: Package_SO:TSSOP-28-1EP_4.4x9.7mm_P0.65mm_EP2.85x6.7mm
  • 3D model: HTSSOP-28-EP (KiCad packages3D, STEP)
  • 3D model files: drv8825pwpr-etched.step / drv8825pwpr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); drv8825pwpr.step / drv8825pwpr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (36 pp, sha256 5b4dccc2497334e1, retrieved 2026-09-17, 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