Overview
The ULN2003AING4, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This integrated circuit consists of seven NPN Darlington transistor pairs, each capable of sinking up to 500 mA and handling output voltages of up to 50 V. The device is designed to be versatile and widely applicable, featuring common-cathode flyback diodes for safely switching inductive loads such as servomotors, relays, and solenoids. It is compatible with various logic families, including TTL and 5-V CMOS, making it a robust solution for a variety of interface needs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Collector Current (Single Output) | - | - | 500 | mA |
| Output Voltage | - | - | 50 | V |
| Collector-Emitter Saturation Voltage | 0.9 | 1.1 | 1.6 | V |
| Propagation Delay Time (Low to High Level Output) | - | 0.25 | 1 | µs |
| Propagation Delay Time (High to Low Level Output) | - | 0.25 | 1 | µs |
| Input Capacitance | 15 | - | 25 | pF |
| On-State Input Voltage | - | - | 5 | V |
Key Features
- Seven high-voltage, high-current NPN Darlington transistor pairs with a collector current rating of 500 mA each.
- High-voltage outputs up to 50 V, with versions supporting up to 100 V available.
- Includes output clamp diodes for inductive load protection.
- Inputs compatible with TTL and 5-V CMOS logic, allowing direct operation with these logic families.
- Series base resistors (2.7 kΩ) for each Darlington pair, enabling operation with low GPIO voltages.
- Common emitter and open collector outputs, with a common cathode node for flyback diodes).
Applications
- Driver circuits for relays, solenoids, and other inductive loads).
- Lamp and LED display drivers).
- Stepper motor drivers, where high current and voltage ratings are necessary).
- Logic buffers and line drivers).
- Hammer drivers and other high-current applications).
Q & A
- What is the ULN2003AING4 used for?
The ULN2003AING4 is used in various applications requiring high-current and high-voltage driver capabilities, such as driving relays, solenoids, lamps, LEDs, and stepper motors).
- What is the collector current rating of the ULN2003AING4?
The collector current rating of the ULN2003AING4 is 500 mA per Darlington pair).
- What is the maximum output voltage of the ULN2003AING4?
The maximum output voltage of the ULN2003AING4 is 50 V, with some versions supporting up to 100 V).
- Does the ULN2003AING4 include protection for inductive loads?
- Is the ULN2003AING4 compatible with TTL and CMOS logic?
- What types of packaging are available for the ULN2003AING4?
The ULN2003AING4 is available in PDIP, SOIC, SOP, and TSSOP packaging).
- Can the Darlington pairs in the ULN2003AING4 be paralleled for higher current output?
- What is the purpose of the series base resistors in the ULN2003AING4?
The series base resistors (2.7 kΩ) allow the device to operate directly with TTL or 5-V CMOS devices).
- What are some common applications of the ULN2003AING4?
- How does the Darlington transistor configuration in the ULN2003AING4 enhance current gain?
