The UDN2987LW is a high-voltage, high-current source driver from Allegro MicroSystems. This IC is designed to drive inductive loads such as relays, solenoids, and stepper motors. It features eight independent drivers, each capable of sourcing up to 500 mA. It also includes built-in protection features such as overcurrent protection and thermal shutdown.

Applications

• Relay Drivers
• Solenoid Drivers
• Stepper Motor Drivers
• Lamp Drivers
• Logic Buffers

Features

• Eight Independent Drivers: Drives multiple loads simultaneously
• High Output Current: Up to 500 mA per channel
• High Output Voltage: Can handle high-voltage loads
• Overcurrent Protection: Protects the IC and load from damage
• Thermal Shutdown: Prevents overheating
• Internal Clamp Diodes: Protects against inductive kickback

Benefits

• Versatile Driver: Suitable for a wide range of inductive loads
• High Performance: Provides reliable and efficient driving capabilities
• Robust Protection: Protects against common fault conditions
• Simplified Design: Reduces the need for external protection components
• Space-Saving Solution: Integrates eight drivers into a single package

Additional Details

The UDN2987LW is typically supplied in a SOIC or DIP package. It operates from a supply voltage of 5V to 50V. The device includes internal clamp diodes for each output, which protect against inductive kickback when driving inductive loads. The inputs are compatible with TTL and CMOS logic levels. Allegro MicroSystems is known for its high-quality and reliable driver ICs. The UDN2987LW is a popular choice for industrial and automotive applications where high-voltage, high-current driving capabilities are required. It simplifies the design of driver circuits and enhances system reliability through its built-in protection features. The integrated clamp diodes are particularly important in applications involving inductive loads, preventing voltage spikes that could damage the driver or the load.