Build with DRV8825 — Datasheet Specs & AI Design Help

00 — Overview

What the DRV8825 does

The DRV8825 is a stepper motor controller IC designed for automated equipment like printers, scanners, and robotics. It integrates two H-bridge drivers and a microstepping indexer to drive bipolar stepper motors with up to 1/32 microstepping resolution. The device operates across an 8.2 V to 45 V supply range and delivers a maximum drive current of 2.5 A per output at 24 V. It supports multiple decay modes including slow, fast, and mixed decay to optimize performance. Built-in protection features handle overcurrent, thermal shutdown, and undervoltage lockout. A simple STEP/DIR interface allows easy controller interfacing, while a low-power sleep mode reduces quiescent current draw. The part includes a built-in 3.3 V reference output and fault indication via a dedicated pin.

Next step

Start building with DRV8825 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for DRV8825
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	5 mA	8 mA	V(VMx) = 24 V; ivm; POWER SUPPLIES	TI datasheet, p. 6 — 7.5 Electrical Characteristics
output current	0 A	—	1 mA	iv3p3; 7.3 Recommended Operating Conditions	TI datasheet, p. 4 — 7.3 Recommended Operating Conditions
supply voltage range	8.2 V	—	45 V	v(vmx); 7.3 Recommended Operating Conditions	TI datasheet, p. 4 — 7.3 Recommended Operating Conditions
rds on	—	250 mOhm	320 mOhm	V(VMx) = 24 V, IO = 1 A, TJ = 85°C; rds(on); H-BRIDGE FETS	TI datasheet, p. 6 — 7.5 Electrical Characteristics
operating temperature	-40 °C	—	85 °C		TI datasheet, p. 6 — 7.5 Electrical Characteristics
rise time	30 ns	—	200 ns	tr; MOTOR DRIVER	TI datasheet, p. 6 — 7.5 Electrical Characteristics
fall time	30 ns	—	200 ns	tf; MOTOR DRIVER	TI datasheet, p. 6 — 7.5 Electrical Characteristics
output voltage low	—	—	500 mV	IO = 5 mA; vol; nHOME, nFAULT OUTPUTS (OPEN-DRAIN OUTPUTS)	TI datasheet, p. 6 — 7.5 Electrical Characteristics
driver count	—	1	—		TI datasheet, p. 1

02 — Alternatives

Closest matches to DRV8825

DRV8833 3.9× lower supply voltage range, 2.9× lower quiescent current, 1.6× higher rise time

TB67S109AFNG 13.3× lower supply voltage range, 2.0× lower quiescent current, 2.0× higher rds on

AT8236 1.3× higher fall time, 1.3× higher rise time, 1.3× lower supply voltage range

DRV8803 3.1× lower quiescent current, 3.0× higher rds on, 1.9× higher operating temperature

DRV8837 4.8× lower supply voltage range, 1.1× higher rds on, 1.1× lower fall time

DRV8844 10.0× higher output current, 5.0× lower quiescent current, 1.9× higher operating temperature

A4988 1.4× higher operating temperature, 1.3× higher rds on, 1.2× lower quiescent current

DRV8803DW 3.1× lower quiescent current, 3.0× higher rds on, 2.4× higher operating temperature

03 — FAQ

Frequently asked questions

What is the driver count for the DRV8825?

The driver count is 1.

What is the fall time (tf) of the MOTOR DRIVER?

The fall time (tf) is 200 ns.

What is the maximum operating temperature for the DRV8825?

The operating temperature is 85 °C.

What is the output current when IV3.3 is 7.3?

The output current is 1 mA.

What is the output voltage low (VOL) for the nHOME and nFAULT open-drain outputs?

The output voltage low is 500 mV when IO = 5 mA.

What is the quiescent current when V(VMx) = 24 V and ivm; POWER SUPPLIES?

The quiescent current is 5 mA.

What is the rds(on) of the H-BRIDGE FETs when V(VMx) = 24 V, IO = 1 A, and TJ = 85°C?

The rds(on) is 250 mOhm.

What is the rise time (tr) of the DRV8825 motor driver?

The rise time (tr) of the DRV8825 motor driver is 200 ns.

What is the supply voltage range for the DRV8825?

The supply voltage range is 45 V at v(vmx) as specified in 7.3 Recommended Operating Conditions.