Overview
The ULQ2003AN, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device is part of the ULN200x and ULQ200x family, known for its versatility and wide range of applications. The ULQ2003AN consists of seven NPN Darlington transistor pairs, each featuring a common emitter and open collector outputs. It is designed to operate directly with TTL or 5V CMOS devices, making it suitable for various interface needs such as driving solenoids, relays, lamps, small motors, and LEDs.
Key Specifications
| Parameter | Test Conditions | Unit | Min | Max | |
|---|---|---|---|---|---|
| Input Capacitance (Ci) | VI = 0, f = 1 MHz | pF | 15 | 25 | 25 |
| ON-state Input Voltage (VI(on)) | VCE = 2 V, IC = 200 mA | V | 2.4 | 2.7 | 3 |
| Collector-Emitter Saturation Voltage (VCE(sat)) | II = 250 μA, IC = 100 mA | V | 0.9 | 1.2 | 1.4 |
| High-Level Output Voltage after Switching (VOH) | VS = 50 V, IO = 300 mA | mV | VS - 50 | VS - 50 | VS - 50 |
| Propagation Delay Time, Low- to High-Level Output (tPLH) | See Figure 6-9 | μs | 1 | 10 | 10 |
| Propagation Delay Time, High- to Low-Level Output (tPHL) | See Figure 6-9 | μs | 1 | 10 | 10 |
| Operating Temperature Range | °C | -40 | 105 |
Key Features
- High-Current Drive Capability: Each Darlington pair can sink up to 500 mA, making it suitable for driving high-current loads such as solenoids, relays, and small motors.
- Compatibility with TTL and CMOS: The device includes a 2.7kΩ series base resistor for each Darlington pair, allowing direct operation with TTL or 5V CMOS devices.
- Inductive Load Protection: Internal free-wheeling diodes suppress kick-back voltage from inductive loads, ensuring reliable operation.
- Wide Temperature Range: The device operates over a temperature range of -40°C to 105°C, enhancing its reliability in various environmental conditions.
- Multiple Package Options: Available in various packages including SOIC, PDIP, SOP, TSSOP, and SOT, providing flexibility in design and application.
Applications
- Relay and Solenoid Drivers: Ideal for driving relays and solenoids in industrial control systems.
- Motor Control: Suitable for controlling small motors and other high-current devices.
- Lamp and LED Drivers: Can be used to drive lamps and LEDs in various lighting applications.
- Automotive Systems: Used in automotive systems for controlling various actuators and loads.
- Industrial Automation: Commonly used in industrial automation for interfacing with high-current devices.
Q & A
- What is the ULQ2003AN device?
The ULQ2003AN is a high-voltage, high-current Darlington transistor array produced by Texas Instruments.
- How many Darlington transistor pairs does the ULQ2003AN contain?
The device contains seven NPN Darlington transistor pairs.
- What is the maximum current each Darlington pair can sink?
Each Darlington pair can sink up to 500 mA.
- Is the ULQ2003AN compatible with TTL and CMOS devices?
Yes, it is compatible with TTL and 5V CMOS devices due to the 2.7kΩ series base resistor for each Darlington pair.
- What protection does the ULQ2003AN offer for inductive loads?
The device includes internal free-wheeling diodes to suppress kick-back voltage from inductive loads.
- What is the operating temperature range of the ULQ2003AN?
The device operates over a temperature range of -40°C to 105°C.
- In what packages is the ULQ2003AN available?
The device is available in SOIC, PDIP, SOP, TSSOP, and SOT packages.
- What types of loads can the ULQ2003AN drive?
The device can drive solenoids, relays, lamps, small motors, and LEDs.
- How do you calculate the coil current when using the ULQ2003AN to drive a coil?
The coil current can be calculated using the formula: ICOIL = (VSUP – VCE(SAT)) / RCOIL.
- What is the significance of the propagation delay times (tPLH and tPHL) in the ULQ2003AN?
The propagation delay times indicate the time it takes for the output to switch from low to high (tPLH) and from high to low (tPHL), which are typically 1 to 10 μs.
