Overview
The LMD18201T/NOPB is a 3A H-Bridge motor driver integrated circuit designed by Texas Instruments. This device is optimized for motion control applications, including DC and stepper motor drives, position and velocity servomechanisms, and various industrial automation tasks. The LMD18201T/NOPB combines bipolar and CMOS control circuitry with DMOS power devices on the same monolithic structure, providing high efficiency and reliability.
Key Specifications
| Parameter | Conditions | Typical Value | Maximum Value | Units |
|---|---|---|---|---|
| Total Supply Voltage (VS) | - | - | 60 | V |
| Continuous Output Current | - | 3A | 3A | A |
| Peak Output Current (200 ms) | - | - | 6A | A |
| Switch ON Resistance (RDS(ON)) at 3A | - | 0.33Ω | 0.40Ω | Ω |
| Clamp Diode Forward Drop (VCLAMP) at 3A | - | 1.2V | 1.5V | V |
| Junction Temperature (TJ(max)) | - | - | 150°C | °C |
| Thermal Shutdown Temperature | - | - | 170°C | °C |
| Thermal Warning Flag Temperature | - | 145°C | - | °C |
Key Features
- Delivers up to 3A continuous output current and accommodates peak output currents up to 6A.
- Operates at supply voltages up to 55V.
- Low RDS(ON) of typically 0.33Ω per switch at 3A.
- TTL and CMOS compatible inputs.
- No “shoot-through” current.
- Internal clamp diodes for transient voltage protection.
- Thermal shutdown at 170°C and thermal warning flag output at 145°C.
- Shorted load protection and current limiting protection circuitry.
- Internal charge pump with external bootstrap capability.
Applications
- DC and stepper motor drives.
- Position and velocity servomechanisms.
- Factory automation robots.
- Numerically controlled machinery.
- Computer printers and plotters.
- Basic motor driver stages in various motion control systems.
Q & A
- What is the maximum continuous output current of the LMD18201T/NOPB?
The maximum continuous output current is 3A.
- What is the maximum supply voltage for the LMD18201T/NOPB?
The maximum supply voltage is 55V.
- What is the typical switch ON resistance (RDS(ON)) of the LMD18201T/NOPB at 3A?
The typical RDS(ON) is 0.33Ω.
- Does the LMD18201T/NOPB have thermal protection features?
- How does the LMD18201T/NOPB protect against shorted loads?
The device has shorted load protection and current limiting protection circuitry.
- Is the LMD18201T/NOPB compatible with TTL and CMOS inputs?
- What type of diodes are integrated into the LMD18201T/NOPB for transient voltage protection?
Internal clamp diodes are integrated for transient voltage protection.
- How can current sensing be achieved with the LMD18201T/NOPB?
Current sensing can be achieved by adding a small sense resistor between the power ground/sense pin and the actual circuit ground.
- What is the recommended capacitor value for the bootstrap circuitry?
A 10 nF capacitor is recommended for the bootstrap circuitry.
- What is the minimum input pulse width required for the LMD18201T/NOPB?
The minimum input pulse width is 1 μs.
