Overview
The ULN2003AIPW is a high-voltage, high-current Darlington transistor array produced by Texas Instruments. This integrated circuit is designed to drive high-current loads such as relays, solenoids, and other inductive loads. The device consists of seven Darlington pairs, each capable of handling high output currents with minimal input current, making it suitable for a variety of applications requiring robust and efficient current drive.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| ON-state Input Voltage (VI(on)) | 2.7 | - | 3 | V |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 0.9 | - | 1.7 | V |
| Collector Cutoff Current (ICEX) | 50 | - | 100 | μA |
| OFF-state Input Current (II(off)) | 30 | - | 65 | μA |
| Input Current (II) | 0.93 | - | 1.35 | mA |
| Input Capacitance (Ci) | 15 | - | 25 | pF |
| Operating Temperature Range | -40 | - | 105 | °C |
Key Features
- Darlington Transistor Array: Each channel consists of Darlington connected NPN transistors, providing high-current gain (β2) up to 10,000 A/A.
- High-Current Drive: Capable of driving high-current loads with minimal input current, suitable for low GPIO voltages.
- Suppressing Kick-Back Voltage: Diodes connected between the output and COM pin to suppress kick-back voltage from inductive loads.
- Low Power Dissipation: Efficient power management with equations provided for calculating on-chip power dissipation based on the number of active channels and load currents.
- Robust Protection: Includes features such as clamp forward voltage and reverse current protection to ensure reliable operation.
Applications
- Relay and Solenoid Drivers: Ideal for driving relays, solenoids, and other inductive loads in various industrial and automotive applications.
- Stepper Motor Drivers: Can be used to drive stepper motors in precision control systems.
- LED Drivers: Suitable for driving high-current LED arrays.
- General Purpose Switching: Used in general-purpose switching applications where high current drive is required.
Q & A
- What is the ULN2003AIPW used for?
The ULN2003AIPW is used to drive high-current loads such as relays, solenoids, and other inductive loads.
- How many Darlington pairs does the ULN2003AIPW contain?
The ULN2003AIPW contains seven Darlington pairs.
- What is the typical collector-emitter saturation voltage (VCE(sat)) of the ULN2003AIPW?
The typical VCE(sat) is between 0.9 V and 1.7 V depending on the input current.
- What is the operating temperature range of the ULN2003AIPW?
The operating temperature range is from -40°C to 105°C.
- How does the ULN2003AIPW protect against kick-back voltage?
The device includes diodes connected between the output and COM pin to suppress kick-back voltage from inductive loads.
- What is the input capacitance (Ci) of the ULN2003AIPW?
The input capacitance is between 15 pF and 25 pF.
- Can the ULN2003AIPW be used to drive stepper motors?
- What is the maximum collector cutoff current (ICEX) of the ULN2003AIPW?
The maximum ICEX is 100 μA.
- How is the on-chip power dissipation calculated for the ULN2003AIPW?
The on-chip power dissipation can be calculated using the equation provided in the datasheet, considering the number of active channels and load currents.
- Is the ULN2003AIPW suitable for general-purpose switching applications?
