DRV8825
Stepper Motor Controller ICThe DRV8825 is a stepper motor controller ic from Texas Instruments. View the full DRV8825 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Official DRV8825 datasheet (PDF) — the source this page was extracted from.
DRV8825 Key Specifications
| Parameter | Value |
|---|---|
| Decay Modes | Slow, Fast, Mixed |
| Output Stage | Dual N-channel MOSFET full H-bridge |
| Control Interface | STEP/DIR |
| Package Body Size | 9.70mm x 6.40mm |
| Protection Features | OCP, TSD (~150°C), VM UVLO, nFAULT indication |
| Maximum Drive Current | 2.5A per output (at 24V, TA = 25°C, with proper heat sinking) |
| Microstepping Resolution | Full, 1/2, 1/4, 1/8, 1/16, 1/32 step |
| Operating Supply Voltage | 8.2V to 45V |
| Integrated Reference Output | 3.3V (V3P3OUT) |
DRV8825 Overview
Part: DRV8825 — Texas Instruments
Type: Stepper Motor Driver (PWM microstepping, dual H-bridge)
Description: 8.2–45 V, 2.5 A (at 24 V, TA = 25°C, with proper heat sinking) bipolar stepper motor driver with built-in microstepping indexer up to 1/32 step and a STEP/DIR interface.
Operating Conditions:
- Supply voltage (VMx): 8.2–45 V
- Operating temperature: -40 to 85 °C (electrical characteristics range, free-air); operating junction temperature -40 to 150 °C
- VREF input voltage: 1–3.5 V
- V3P3OUT load current: 0–1 mA
Absolute Maximum Ratings:
- Max supply voltage (VMx): 47 V
- Max continuous motor drive output current: 2.5 A
- Max operating junction temperature: 150 °C
- Storage temperature: -60 to 150 °C
Key Specs:
- VM operating supply current: 5 mA typ, 8 mA max (VMx = 24 V)
- VM sleep mode supply current: 10 μA typ, 20 μA max (VMx = 24 V)
- H-bridge FET on-resistance (HS or LS): 0.2 Ω typ at TJ = 25°C; 0.25 Ω typ, 0.32 Ω max at TJ = 85°C (VMx = 24 V, IO = 1 A)
- V3P3OUT voltage: 3.2–3.4 V (3.3 V typ), IOUT = 0 to 1 mA
- Internal PWM current control frequency: 30 kHz typ
- Overcurrent protection trip level: 3 A min
- VM UVLO: 7.8 V typ, 8.2 V max (VMx rising)
- Thermal shutdown: 160 °C typ (150–180 °C)
- Maximum step frequency: 250 kHz
- Current trip accuracy: ±5% at 71–100% current setting (VxREF = 3.3 V)
- Logic input thresholds: VIL max 0.7 V, VIH min 2.2 V
Features:
- PWM microstepping driver with built-in indexer, up to 1/32 microstepping
- Mixed, slow, and fast decay modes
- Simple STEP/DIR interface
- Low-current sleep mode
- Built-in 3.3 V reference output
- Overcurrent protection, thermal shutdown, VM undervoltage lockout
- nFAULT fault indication pin
Applications:
- Automatic teller machines
- Money handling machines
- Video security cameras
- Printers and scanners
- Office automation machines
- Gaming machines
- Factory automation
- Robotics
Package:
- HTSSOP (28), 9.70 mm × 6.40 mm (PWP)
DRV8825 Applications
- Automatic Teller Machines
- Money Handling Machines
- Video Security Cameras
- Printers
- Scanners
- Office Automation Machines
- Gaming Machines
- Factory Automation
- Robotics
DRV8825 Pin Configuration
DRV8825 Electrical Characteristics
over operating free-air temperature range of -40°C to 85°C (unless otherwise noted)
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| POWER SUPPLIES | POWER SUPPLIES | |||||
| I VM | VM operating supply current | V (VMx) = 24 V | 5 | 8 | mA | |
| I VMQ | VM sleep mode supply current | V (VMx) = 24 V | 10 | 20 | μ A | |
| V3P3OUT REGULATOR | V3P3OUT REGULATOR | |||||
| V 3P3 | V3P3OUT voltage | IOUT = 0 to 1 mA | 3.2 | 3.3 | 3.4 | V |
| LOGIC-LEVEL | INPUTS | |||||
| V IL | Input low voltage | 0 | 0.7 | V | ||
| V IH | Input high voltage | 2.2 | 5.25 | V | ||
| V HYS | Input hysteresis | 0.3 | 0.45 | 0.6 | V | |
| I IL | Input low current | VIN = 0 | -20 | 20 | μ A | |
| I IH | Input high current | VIN = 3.3 V | 100 | μ A | ||
| R PD | Internal pulldown resistance | 100 | k Ω | |||
| nHOME, nFAULT OUTPUTS (OPEN-DRAIN | nHOME, nFAULT OUTPUTS (OPEN-DRAIN | OUTPUTS) | ||||
| V OL | Output low voltage | I O = 5 mA | 0.5 | V | ||
| I OH | Output high leakage current | V O = 3.3 V | 1 | μ A | ||
| DECAY INPUT | DECAY INPUT | |||||
| V IL | Input low threshold voltage | For slow decay mode | 0.8 | V | ||
| V IH | Input high threshold voltage | For fast decay mode | 2 | V | ||
| I IN | Input current | -40 | 40 | μA | ||
| R PU | Internal pullup resistance (to 3.3 V) | 130 | k Ω | |||
| R PD | Internal pulldown resistance | 80 | k Ω | |||
| H-BRIDGE FETS | H-BRIDGE FETS | |||||
| R DS(ON) | V (VMx) = 24 V, I O = 1 A, T J = 25°C | 0.2 | ||||
| R DS(ON) | HS FET on resistance | V (VMx) = 24 V, I O = 1 A, T J = 85°C | 0.25 | 0.32 | ||
| R DS(ON) | V (VMx) = 24 V, I O = 1 A, T J = 25°C | 0.2 | Ω | |||
| LS FET on resistance | V (VMx) = 24 V, I O = 1 A, T J = 85°C | 0.25 | 0.32 | |||
| I OFF | Off-state leakage current | -20 | 20 | μ A | ||
| MOTOR DRIVER | MOTOR DRIVER | |||||
| ƒ PWM | Internal current control PWM frequency | 30 | kHz | |||
| t BLANK | Current sense blanking time | 4 | μ s | |||
| t R | Rise time | 30 | 200 | ns | ||
| t F | Fall time | 30 | 200 | ns | ||
| PROTECTION CIRCUITS | PROTECTION CIRCUITS | |||||
| V UVLO | VM undervoltage lockout voltage | V (VMx) rising | 7.8 | 8.2 | V | |
| I OCP | Overcurrent protection trip level | 3 | A | |||
| t DEG | Overcurrent deglitch time | 3 | μs | |||
| t TSD | Thermal shutdown temperature | Die temperature | 150 | 160 | 180 | °C |
| CURRENT CONTROL | CURRENT CONTROL | |||||
| I REF | xVREF input current | V (xVREF) = 3.3 V | -3 | 3 | μ A | |
| V TRIP | xISENSE trip voltage | V (xVREF) = 3.3 V, 100% current setting V (xVREF) = 3.3 V, 5% current setting | 635 -25% | 660 | 685 25% | mV |
| Δ I | Current trip accuracy | V (xVREF) = 3.3 V, 10% to 34% current setting | -15% | 15% | ||
| TRIP | (relative to programmed value) | V (xVREF) = 3.3 V, 38% to 67% current setting | -10% | 10% | ||
| TRIP | V (xVREF) = 3.3 V, 71% to 100% current setting | -5% | 5% | |||
| A ISENSE Current sense amplifier | gain | Reference only | 5 | V/V |
DRV8825 Absolute Maximum Ratings
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| V (VMx) | Power supply voltage | -0.3 | 47 | V |
| V (VMx) | Power supply ramp rate | 1 | V/μs | |
| Digital pin voltage | -0.5 | 7 | V | |
| V (xVREF) | Input voltage | -0.3 | 4 | V |
| ISENSEx pin voltage (3) | -0.8 | 0.8 | V | |
| Peak motor drive output current, t < 1 μ s | Internally limited | Internally limited | A | |
| Continuous motor drive output current (4) | 0 | 2.5 | A | |
| Continuous total power dissipation | See Thermal Information | See Thermal Information | See Thermal Information | |
| T J | Operating junction temperature range | -40 | 150 | °C |
- (2) All voltage values are with respect to network ground terminal.
(3) Transients of ±1 V for less than 25 ns are acceptable
(4) Power dissipation and thermal limits must be observed.
DRV8825 Recommended Operating Conditions
| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| V (VMx) | Motor power supply voltage range (1) | 8.2 | 45 | V | |
| V (VREF) | VREF input voltage (2) | 1 | 3.5 | V | |
| I V3P3 | V3P3OUT load current | 0 | 1 | mA |
DRV8825 Thermal Information
| THERMAL METRIC (1) | DRV8825 PWP - 28 PINS | UNIT | |
|---|---|---|---|
| R θ JA | Junction-to-ambient thermal resistance (2) | 31.6 | °C/W |
| R θ JC(top) | Junction-to-case (top) thermal resistance (3) | 15.9 | °C/W |
| R θ JB | Junction-to-board thermal resistance (4) | 5.6 | °C/W |
| ψ JT | Junction-to-top characterization parameter (5) | 0.2 | °C/W |
| ψ JB | Junction-to-board characterization parameter (6) | 5.5 | °C/W |
| R θ JC(bot) | Junction-to-case (bottom) thermal resistance (7) | 1.4 | °C/W |
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DRV8825 Typical Application
The DRV8825 is used in bipolar stepper control. The microstepping motor driver provides additional precision and a smooth rotation from the stepper motor. The following design is a common application of the DRV8825.
DRV8825 Package Information
SMALL OUTLINE PACKAGE
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