Overview
The ULN2003APWRG4, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device is part of the ULN2003A series and is widely recognized for its versatility and ubiquity across various applications. It consists of seven NPN Darlington transistor pairs, each capable of sinking up to 500 mA of current. The device features common emitter and open collector outputs, along with suppression diodes for inductive loads, making it highly effective in managing high-current and high-voltage requirements.
Key Specifications
| Parameter | Test Conditions | Unit | Min | Max | |
|---|---|---|---|---|---|
| Collector Current (IC) | Single output | mA | - | - | 500 |
| High-Level Output Voltage (VOH) | VS = 50 V, IO ≈ 300 mA | V | - | - | VS – 20 mV |
| Collector-Emitter Saturation Voltage (VCE(sat)) | II = 250 μA, IC = 100 mA | V | 0.9 | 1.2 | - |
| Propagation Delay Time (tPLH) | Low- to high-level output | μs | 0.25 | 1 | - |
| Propagation Delay Time (tPHL) | High- to low-level output | μs | 0.25 | 1 | - |
| Operating Temperature Range | - | °C | -40 | - | 70 |
| Package Type | - | - | - | - | TSSOP (PW) |
| Package Size | - | mm | - | - | 5.00 × 4.40 |
Key Features
- High-voltage outputs: up to 50 V
- High-current capability: up to 500 mA per output
- Inputs compatible with various types of logic (TTL, 5V CMOS, 3.3V CMOS)
- Series base resistor for each Darlington pair (2.7 kΩ for ULN2003A)
- Suppression diodes for inductive loads
- Common emitter and open collector outputs
- Low input current requirements due to high-current gain (β2) of Darlington transistors
Applications
The ULN2003APWRG4 is versatile and can be used in a variety of applications, including:
- Driving solenoids and relays
- Controlling lamps and small motors
- Driving LEDs and other high-current loads
- Interface circuits for microcontrollers and other logic devices
- Industrial control systems requiring high-current and high-voltage outputs
Q & A
- What is the maximum collector current per output of the ULN2003APWRG4?
The maximum collector current per output is 500 mA.
- What is the operating temperature range of the ULN2003APWRG4?
The operating temperature range is -40°C to 70°C.
- What types of logic are the inputs of the ULN2003APWRG4 compatible with?
The inputs are compatible with TTL, 5V CMOS, and 3.3V CMOS logic.
- What is the purpose of the suppression diodes in the ULN2003APWRG4?
The suppression diodes are used to suppress the kick-back voltage from inductive loads when the NPN drivers are turned off.
- What is the package type and size of the ULN2003APWRG4?
The package type is TSSOP (PW) and the size is 5.00 mm × 4.40 mm.
- What is the high-voltage output capability of the ULN2003APWRG4?
The device can handle high-voltage outputs up to 50 V.
- How many Darlington transistor pairs are in the ULN2003APWRG4?
The device consists of seven NPN Darlington transistor pairs.
- What is the typical propagation delay time for the ULN2003APWRG4?
The typical propagation delay time is around 1 μs for both low- to high-level and high- to low-level outputs.
- Can the ULN2003APWRG4 be used to drive LEDs and small motors?
- What is the role of the series base resistor in the ULN2003APWRG4?
The series base resistor (2.7 kΩ) allows the device to operate directly with TTL or CMOS logic.
