The ULN2824LW is a high-voltage, high-current Darlington transistor array manufactured by Allegro MicroSystems, LLC. It is designed for interfacing low-level logic signals to high-power loads. The device contains eight independent Darlington transistor pairs, each capable of driving inductive loads such as relays, solenoids, and lamps. It features integral suppression diodes for inductive load protection.

Applications

• Relay Drivers: Used to drive relays in various control systems.
• Solenoid Drivers: Employed in solenoid control applications, such as valve actuation.
• Lamp Drivers: Utilized for driving lamps and LED indicators.
• Motor Drivers: Used as motor drivers in low-power motor control applications.
• Logic Buffers: Integrated as logic buffers in high-current applications.

Features

• Eight Darlington Transistor Pairs: Contains eight independent Darlington transistor pairs.
• High-Voltage Output: Supports output voltages up to 50V.
• High-Current Output: Capable of driving output currents up to 500mA per channel.
• Integral Suppression Diodes: Includes integral suppression diodes for inductive load protection.
• TTL/CMOS Compatible Inputs: Compatible with TTL and CMOS logic levels.
• Low Input Current: Requires low input current for driving the Darlington transistors.

Benefits

• Simplified Interfacing: Allows direct interfacing of low-level logic signals to high-power loads.
• Inductive Load Protection: Integral suppression diodes protect against voltage spikes from inductive loads.
• High Reliability: Robust design ensures reliable operation in demanding applications.
• Versatile Application: Suitable for a wide range of high-voltage, high-current driving applications.
• Cost-Effective Solution: Provides a cost-effective solution for driving multiple loads simultaneously.

Additional Details

The ULN2824LW operates with a supply voltage typically between 5V and 24V. It is available in a DIP (Dual In-Line Package) or SOIC (Small Outline Integrated Circuit) package. The device also includes a common emitter connection for added flexibility. The ULN2824LW is a reliable and versatile solution for interfacing low-level logic to high-power loads in various applications. This part is often used as a sinking driver.