LB1939T-TLM-E

Product Overview

Category: Integrated Circuit (IC)

Use: LB1939T-TLM-E is a motor driver IC designed for controlling the speed and direction of DC motors. It is commonly used in various applications that require precise motor control, such as robotics, automotive systems, and industrial automation.

Characteristics: - High efficiency and low power consumption - Wide operating voltage range - Built-in protection features against overcurrent, overtemperature, and undervoltage - Compact package size for space-constrained applications

Package: LB1939T-TLM-E is available in a small outline package (SOP) with 16 pins.

Essence: The essence of LB1939T-TLM-E lies in its ability to provide reliable and efficient motor control in a compact form factor.

Packaging/Quantity: LB1939T-TLM-E is typically sold in reels or tubes, with each reel/tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Operating Voltage Range: 2.5V to 16V
• Output Current: Up to 1.2A per channel
• Number of Channels: 2
• Control Interface: PWM (Pulse Width Modulation)
• Thermal Shutdown Temperature: 150°C
• Standby Current: 0.1µA (typical)

Detailed Pin Configuration

LB1939T-TLM-E follows a standard pin configuration for motor driver ICs:

1. VCC - Power supply voltage input
2. IN1 - Input for controlling the direction of Channel 1
3. IN2 - Input for controlling the direction of Channel 2
4. OUT1 - Output for driving Channel 1
5. OUT2 - Output for driving Channel 2
6. GND - Ground reference
7. VREF - Reference voltage for internal circuitry
8. PWM1 - Input for controlling the speed of Channel 1 using PWM signal
9. PWM2 - Input for controlling the speed of Channel 2 using PWM signal
10. FAULT - Output indicating fault conditions (e.g., overcurrent, overtemperature)
11. SLEEP - Sleep mode control input
12. NC - Not connected
13. NC - Not connected
14. NC - Not connected
15. NC - Not connected
16. NC - Not connected

Functional Features

• Bidirectional motor control: LB1939T-TLM-E allows controlling the speed and direction of DC motors in both forward and reverse directions.
• Speed control: The IC supports speed control through the use of PWM signals, enabling precise motor speed adjustment.
• Protection features: LB1939T-TLM-E incorporates various protection mechanisms to safeguard the motor and the IC itself against overcurrent, overtemperature, and undervoltage conditions.
• Sleep mode: The sleep mode functionality helps conserve power when the motor is not in use.

Advantages and Disadvantages

Advantages: - High efficiency operation - Wide operating voltage range allows compatibility with various power sources - Compact package size enables integration into space-constrained designs - Built-in protection features enhance system reliability

Disadvantages: - Limited output current capacity compared to higher-power motor driver ICs - Requires external components for proper operation (e.g., power supply, PWM signal source)

Working Principles

LB1939T-TLM-E operates by receiving control signals through its input pins (IN1, IN2, PWM1, PWM2) and generating corresponding output signals (OUT1, OUT2) to drive the connected DC motor. The direction of rotation is determined by the logic levels applied to the IN1 and IN2 pins, while the speed is controlled by the duty cycle of the PWM signals applied to the PWM1 and PWM2 pins.

The IC continuously monitors the motor current and temperature, activating the fault output (FAULT) if any abnormal conditions are detected. Additionally, the sleep mode (controlled by the SLEEP pin) allows the IC to enter a low-power state when the motor is not in use.

Detailed Application Field Plans

LB1939T-TLM-E finds applications in various fields that require precise control of DC motors. Some of the potential application areas include:

1. Robotics: LB1939T-TLM-E can be used in robotic systems for controlling the movement of robot arms, wheels, or other motorized components.
2. Automotive Systems: The IC can be employed in automotive applications such as power windows, seat adjustments, and HVAC systems.
3. Industrial Automation: LB1939T-TLM-E enables precise motor control in industrial automation equipment like conveyor belts, robotic arms, and CNC machines.

Detailed and Complete Alternative Models

• L293D: A popular motor driver IC with similar functionality but higher output current capacity.