Overview
The ULQ2003A-Q1 is a high-voltage, high-current Darlington transistor array produced by Texas Instruments. This device is part of the ULQ200xA-Q1 family and is designed for a wide range of applications, particularly in automotive and industrial settings. It consists of seven npn Darlington pairs, each capable of sinking up to 500 mA of current and handling high-voltage outputs up to 50V. The device features common-cathode clamp diodes for effective switching of inductive loads, making it suitable for driving relays, solenoids, motors, and other high-current peripherals.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| On-state input voltage (VI(on)) | VCE = 2 V, IC = 200 mA | 2.7 | - | - | V |
| Collector-emitter saturation voltage (VCE(sat)) | II = 250 μA, IC = 100 mA | 0.9 | 1.2 | 1.3 | V |
| Collector current rating (single output) | - | - | - | 500 | mA |
| High-voltage output | - | - | - | 50 | V |
| Operating temperature range | - | -40 | - | 125 | °C |
| Package types | - | SOIC (16), TSSOP (16), SOT (16) | - | - | - |
Key Features
- Qualified for automotive applications
- ESD protection exceeds 200V using machine model (C = 200pF, R = 0)
- 500mA-rated collector current (single output)
- High-voltage outputs: 50V
- Output clamp diodes for switching inductive loads
- Inputs compatible with various types of logic (TTL, 5V CMOS, 3.3V CMOS)
- Relay-driver applications
- Series base resistor for direct operation with logic devices (2.7kΩ for ULQ2003A-Q1, 10.5kΩ for ULQ2004A-Q1)
Applications
- Relay drivers
- Stepper and DC brushed motor drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
- Driving high-voltage or high-current peripherals from MCUs or logic devices
Q & A
- What is the ULQ2003A-Q1 device?
The ULQ2003A-Q1 is a high-voltage, high-current Darlington transistor array consisting of seven npn Darlington pairs.
- What is the collector current rating of a single Darlington pair?
The collector current rating of a single Darlington pair is 500 mA.
- What are the high-voltage output capabilities of the ULQ2003A-Q1?
The device can handle high-voltage outputs up to 50V.
- What types of logic are the inputs compatible with?
The inputs are compatible with various types of logic, including TTL, 5V CMOS, and 3.3V CMOS.
- What is the purpose of the output clamp diodes?
The output clamp diodes are used to suppress the kick-back voltage from inductive loads.
- Can the Darlington pairs be paralleled for higher current capability?
Yes, the Darlington pairs can be paralleled to achieve higher current capability.
- What is the operating temperature range of the ULQ2003A-Q1?
The operating temperature range is from -40°C to 125°C.
- What are some common applications of the ULQ2003A-Q1?
Common applications include relay drivers, motor drivers, lamp drivers, and display drivers.
- Does the ULQ2003A-Q1 require a power supply?
No, the device does not need a power supply, but the COM pin is typically tied to the system power supply.
- How do you determine the number of coils that can be driven by the ULQ2003A-Q1?
The number of coils can be determined based on the coil current and on-chip power dissipation, using the provided equations and figures in the datasheet.
