Overview
The ULN2003B, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device is designed to handle demanding applications requiring high current and voltage capabilities. It consists of seven NPN Darlington pairs, each capable of sinking up to 500 mA of collector current, with peak currents reaching 600 mA. The ULN2003B is compatible with various logic families, including TTL and CMOS, and features integrated suppression diodes for driving inductive loads. It is widely used in applications such as relay drivers, lamp drivers, display drivers, and line drivers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 50 | V |
| Continuous Collector Current | 500 | mA |
| Peak Collector Current | 600 | mA |
| Input Voltage Compatibility | TTL, CMOS | |
| Operating Ambient Temperature Range | -40 to +105 | °C |
| Junction Temperature | 150 | °C |
| Clamping Diode Continuous Current | 350 | mA |
| Clamping Diode Reverse Voltage | 50 | V |
| Package Types | PDIP (16), SOIC (16), TSSOP (16) |
Key Features
- Seven NPN Darlington pairs with high-voltage outputs and common-cathode clamp diodes for inductive load switching.
- Each Darlington pair can sink up to 500 mA of collector current, with peak currents of 600 mA.
- Inputs compatible with TTL and CMOS logic families.
- Integrated suppression diodes for inductive load driving.
- Outputs can be paralleled for higher current capability.
- Series base resistor for direct operation with TTL or CMOS devices.
- Wide operating temperature range from -40°C to +105°C.
Applications
- Relay drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
- Solenoids and small motors
- High-power buffers
Q & A
- What is the ULN2003B? The ULN2003B is a high-voltage, high-current Darlington transistor array produced by Texas Instruments.
- How many Darlington pairs does the ULN2003B contain? The ULN2003B contains seven NPN Darlington pairs.
- What is the maximum collector current per Darlington pair? Each Darlington pair can sink up to 500 mA of collector current.
- What is the peak collector current capability? The peak collector current is 600 mA.
- Is the ULN2003B compatible with TTL and CMOS logic? Yes, the ULN2003B is compatible with TTL and CMOS logic families.
- What type of loads can the ULN2003B drive? The ULN2003B can drive inductive loads, resistive loads, relays, lamps, and other high-current devices.
- What is the purpose of the integrated suppression diodes? The integrated suppression diodes are used to suppress the kick-back voltage from inductive loads.
- Can the outputs of the ULN2003B be paralleled? Yes, the outputs can be paralleled to achieve higher current capability.
- What are the available package types for the ULN2003B? The ULN2003B is available in PDIP (16), SOIC (16), and TSSOP (16) packages.
- What is the operating temperature range of the ULN2003B? The operating temperature range is from -40°C to +105°C.
