ULN2068 (Darlington Transistor Array IC)

Description :-

ULN2068B is designed to interface logic to a wide variety of high current, high voltage loads, this device contains four NPN Darlington switches delivering up to 1.5 A with a specified minimum breakdown of 50 V and a sustaining voltage of 35 V measured at 100 mA.

The ULN2068B contains integral suppression diodes for inductive loads that have common emitters.

The ULN2068B feature isolated Darlington pinouts and is intended for applications such as emitter follower configurations. The input of the ULN2068B is compatible with popular 5 V logic families. Type ULN2068B includes a pre-driver stage to reduce loading on the control logic.

Features

• Output current to 1.5 A for each Darlington
• Minimum breakdown 50 V
• Sustaining voltage at least 35 V

Technical Specifications

Case/Package PDIP

Mount Through Hole

Number of Pins 16

Collector-Emitter Breakdown Voltage 50 V

Collector-Emitter Saturation Voltage 1.4 V

Collector-Emitter Voltage (VCEO) 50 V

Continuous Collector Current 1.75 A

Current Rating 1.5 A

Emitter Base Voltage (VEBO) 50 V

Max Collector Current 1.75 A

Max Input Voltage 15 V

Max Operating Temperature 85 °C

Max Output Voltage 50 V

Max Power Dissipation 4.3 W

Min Operating Temperature -20 °C

Number of Channels 4

Number of Elements 4

Output Current 1.5 A

Output Voltage 50 V

Polarity NPN

Voltage Rating (DC) 50 V

Applications of ULN2068:

1. Motor and Relay Drivers:

• The ULN2068 is commonly used to drive DC motors, stepper motors, relays, solenoids, and other inductive loads in applications like robotics, automation, and industrial control systems.

1. Control of High-Current Loads:

• It can be used to control high-current loads in systems that require switching of high-power components via low-power digital logic signals.

1. Lamp and Light Control:

• It is useful for controlling incandescent lamps, LED arrays, or light bulbs, where you need to control power using low-voltage control signals.

1. LED Drivers:

• The IC can also be used in circuits that drive high-current LED arrays with the appropriate current control.

1. Automation Systems:

• In automation systems, industrial machinery, and home automation, it can be used for switching high-power devices like actuators, motors, and valves.

1. Microcontroller Interfaces:

• It allows microcontrollers (such as Arduino, Raspberry Pi, etc.) to drive high-power outputs safely by interfacing with lower-voltage control signals.

ULN2068 Datasheet