motor-driver-dat

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chips

stepper motor

and more

Chip function lists

  • overcurrent / thermal shutdown protection / microstepping / precise motor control

advanced control

Comparison

TB6612FNG vs. L298N

Feature TB6612FNG L298N
Motor Voltage Range 2.5V – 13.5V 5V – 46V
Logic Voltage Range 2.7V – 5.5V 5V – 7V
Continuous Current / ch ~1.2A 2A
Peak Current / ch 3.2A (short bursts) 3A (non-repetitive)
Efficiency High (CMOS) Low (Bipolar)
Voltage Drop ~0.2V ~1.8V – 3V
Heat Output Low High
PWM Frequency Support Up to 100 kHz <25 kHz
Size Small, modern Large, bulky
Cost Moderate Low

more options

Chip/Module Voltage Range Continuous Current PWM Freq. Features & Notes
TB6612FNG 2.5V – 13.5V 1.2A/ch (3.2A peak) Up to 100kHz Efficient CMOS, low heat, great for small robots
DRV8833 2.7V – 10.8V 1.5A/ch (2A peak) Up to 250kHz Compact, efficient, built-in protection, ideal for small DC motors
DRV8871 6.5V – 45V 3.6A (6A peak) ~100kHz Single-channel, robust, good for mid-power motors
DRV8876 4.5V – 37V 3.5A (5A peak) ~100kHz Smart current regulation, overtemp/short protection
MC33926 5V – 28V 3A (5A peak) Up to 20kHz Automotive-grade, robust with fault reporting
VNH5019 5.5V – 24V 12A (30A peak) ~20kHz High-power, onboard protection, great for large motors
BTN7960B 5.5V – 27V 43A (55A peak) ~25kHz High-current half-bridge, excellent for industrial/heavy-duty applications

Relay-Based H-Bridge

you can control a high current DC motor using relays to switch it ON/OFF and to control clockwise (CW) and counter-clockwise (CCW) rotation by reversing the polarity with an H-Bridge made from relays.

How It Works: Relay-Based H-Bridge

A DC motor reverses direction by reversing the polarity of the voltage applied to its terminals. An H-Bridge uses 4 relays to achieve this.

Relay-Based H-Bridge Configuration (4-Relay Method)

Components

  • 4 relays (DPST or SPST) rated for motor voltage and stall current
  • Flyback diodes across relay coils
  • Flyback diodes across motor terminals (recommended)
  • Control logic (manual switches or microcontroller)

Operation Modes

Relay 1 Relay 2 Relay 3 Relay 4 Motor Direction
ON OFF ON OFF Clockwise
OFF ON OFF ON Counter-Clockwise
OFF OFF OFF OFF Motor OFF

Important: Never activate relays that create a short circuit (e.g., Relay 1 and Relay 2 ON simultaneously). Use interlock logic.

Important Considerations

  1. Relay Ratings: Must handle the motor's voltage and stall current (stall current can be 5–10× running current).
  2. Flyback Diodes: Required across relay coils and motor terminals to protect from voltage spikes.
  3. Logic Interlock: Ensure relays cannot be activated in conflicting states.
  4. Switching Delay: Turn OFF all relays briefly before changing direction to avoid shorts and damage.

High Current DC Motors (CW/CCW + ON/OFF)

🔋 1. Solid-State H-Bridge Using Power MOSFETs or IGBTs

✅ Best for:

  • High current (10A–100A+)
  • Fast and frequent switching (PWM)
  • Compact, efficient control

📦 Components:

  • 4 N-channel power MOSFETs (e.g., IRF1404, IRF3205)
  • Gate driver ICs (e.g., IR2104, HIP4081)
  • Microcontroller (Arduino, STM32, etc.)
  • Heat sinks or cooling fans
  • Protection: flyback diodes, current sensors

🟢 Pros:

  • Very fast switching (PWM possible)
  • Silent, no moving parts
  • Low power loss
  • Scalable

🔴 Cons:

  • More complex (requires driver circuitry)
  • Thermal design required

🧱 2. Prebuilt H-Bridge Driver Modules (MOSFET or IGBT-based)

✅ Best for:

  • Medium to high current (15A–75A)
  • Fast setup and integration

Examples:

  • BTS7960 (43A/channel) - BTS7960-dat
  • VNH2SP30 (30A motor driver) - VNH2SP30-dat - sdr1070-dat
  • Sabertooth motor drivers (robust, configurable)
  • IGBT driver modules (for large motors)

🟢 Pros:

  • Built-in protections (thermal, overcurrent)
  • Logic-level control (PWM + direction)
  • Compact and reliable

🔴 Cons:

  • May be more expensive
  • Power limits based on model

🔌 3. High-Power DC Contactor + Polarity Reversing Circuit

✅ Best for:

  • Very high current motors (100A+)
  • Infrequent switching (e.g., industrial/vehicle systems)

Setup:

  • 2 contactors for direction (polarity reversal)
  • 1 contactor for ON/OFF
  • Optional soft-start or precharge circuit

🟢 Pros:

  • Very robust and durable
  • Handles surge current well
  • Galvanic isolation

🔴 Cons:

  • Bulky and expensive
  • Mechanical wear
  • Slower switching

🏆 Summary Table

Use Case Recommended Method
Compact, efficient motor control MOSFET H-Bridge with gate drivers
Easy integration, plug-and-play BTS7960 or Sabertooth driver module
Extreme current (100A+), rugged use DC contactor with polarity control
PWM speed control + direction Solid-state H-Bridge
Low-speed control, basic CW/CCW Relay-based H-Bridge (least recommended)

⚠️ Tips and Safety

  • ✅ Use flyback diodes (or body diodes in MOSFETs).
  • ✅ Include gate resistors and dead-time logic to avoid shoot-through.
  • ✅ Add current sensing (e.g., Hall sensors) for protection.
  • ✅ Ensure good thermal design (heatsinks, fans, or active cooling).

more driving chips

✅ Quick Comparison Table

Chip/Module Current Voltage Type Notes
BTS7960-dat 43A peak ~24V Half-Bridge Needs 2 for full H-Bridge
VNH2SP30-dat 14A/30A peak 5.5–16V Full H-Bridge Compact, good protection
MC33932-dat 5A/8A peak 5–28V Dual H-Bridge Diagnostics and protection
DRV84x2-dat 6–12A Up to 50V Dual H-Bridge High-efficiency PWM
L298N-dat 2A Up to 46V Dual H-Bridge NOT for high current
Sabertooth Up to 120A 6–30V Dual H-Bridge Best for industrial/robotics
Cytron MD30C 30A 5–30V Single H-Bridge Reliable and simple
IBT-2 43A 6–27V Full H-Bridge BTS7960 module variant
AMC8832 15A+ Up to 50V Full H-Bridge Advanced high-efficiency

Other Tech

ref

Table of Contents

https://www.electrodragon.com