ULN2003AIDR (TI high voltage transistor) pin diagram and parameter introduction

ULN2003AIDR is a Texas Instruments high voltage transistor consisting of 7 NPN Darlington pairs with high voltage outputs with common cathode clamping diodes for switching inductive loads.

The collector current rating for a single Darlington pair is 500mA. Connecting Darlington pairs in parallel provides greater current. Includes relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers and logic buffers.

ULN2003AIDR is specifically designed for use with 14V to 25V PMOS devices. Each input of the ULN2003AIDR has a Zener diode and resistor in series to control the input current within a safe range. The ULN2003AIDR has a 2.7kΩ series base resistor per Darlington pair and can operate directly with TTL or 5V CMOS devices.

The ULN2003AIDR features a 10.5kΩ series base resistor, allowing operation directly from CMOS devices using supply voltages from 6V to 15V. The input current required by the ULN2003AIDR is less than that of the ULx2003A device, and the required voltage is less than the voltage required by the ULN2003AIDR.

Functional features of ULN2003AIDR

1. High integration: ULN2003AIDR integrates 7 switching transistors with internal current-limiting resistors, which can drive multiple channels through one chip, greatly simplifying circuit design and layout.

2. High current driving capability: ULN2003AIDR has an output current of up to 500mA and can drive various types of loads, such as relays, stepper motors, LEDs, etc.

3. Wide power supply voltage range: ULN2003AIDR can work normally within the power supply voltage range of 3V to 50V, and is suitable for different application scenarios.

4. Low input current: The input current of ULN2003AIDR is low, only 1.5mA (typical value), which can reduce power consumption and improve efficiency.

5. Hardware protection function: ULN2003AIDR has built-in overcurrent protection and overheating protection functions, which can protect the output port and the chip itself, enhancing the reliability of the system.

Application fields of ULN2003AIDR

ULN2003AIDR has 7 switch inputs and 7 switch outputs. Each output can withstand 500mA current. Its main application areas are as follows:

1. Motor drive: ULN2003AIDR can be used to drive various motors, such as stepper motors, DC motors and brushed motors.

2. Relay control: ULN2003AIDR can provide high voltage and high current driving capabilities and is suitable for various relay control applications.

3. Industrial automation: ULN2003AIDR can be used with other sensors and actuators for industrial control and automation systems, such as PLC controllers, automation equipment control, etc.

4. Lighting control: ULN2003AIDR can be used to control high-power LEDs in LED light strips, stage lights and lighting systems.

5. Instruments: ULN2003AIDR is suitable for controlling and driving various instruments, such as temperature controllers, voltmeters and ammeters.

Parameters of ULN2003AIDR

Brand: Texas Instruments

Product Category: High Voltage Transistor

Series: Original

Input type: Reverse Phase

Working temperature: -40℃~+105℃

Installation type: SMT

Package/casing: SOIC16_150MIL

Length x Width/Dimensions: 9.90 x 3.90mm

Ratio (input:output): 1:1

Output configuration: Low Side

Interface: Parallel

On-resistance: OriginalmΩ

Load voltage: 50V

Output type: NPN

Output current: 500mA

Switch Type: Relay, Solenoid Driver

Height: 1.75mm

Number of pins: 16Pin

Storage temperature: -65℃~+150℃

Component life cycle: Active

Pin diagram of ULN2003AIDR

Functional block diagram of ULN2003AIDR

Package diagram of ULN2003AIDR

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