relay and indicator light driver DOWO ULN2003 DW Darlington transistor array with TTL CMOS compatibility
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Product Description
ULN2003 Darlington Transistor Array
The ULN2003 is a monolithic high-voltage, high-current Darlington transistor array. It internally contains seven independent Darlington drive channels, each with a freewheeling diode for inductive loads like relays and stepper motors. Each Darlington pair can output up to 500mA, with parallel channels offering higher current capability. This array is widely used for relay driving, lighting, LED displays, stepper motors, and as logic buffers. Each channel includes a 2.7K base resistor, allowing direct connection to TTL/CMOS circuits at 5V, simplifying signal processing.
Key Features
- 500mA rated collector current (per channel)
- High operating voltage (40V)
- Input compatible with TTL/CMOS logic signals
- Wide application in relay driving
- Available in SOP16 and DIP16 packages
Main Application Fields
- Relay Drivers
- Indicator Light Drivers
- Display Drivers (LED)
Technical Specifications
| Parameter | Symbol | Condition | Min | Typical | Max | Unit |
| Absolute Maximum Ratings (TA=25 unless otherwise specified) | ||||||
| Collector-Emitter Voltage | VCE | 40 | V | |||
| COM Terminal Voltage | VCOM | 40 | V | |||
| Input Voltage | VI | 30 | V | |||
| Single Channel Peak Collector Current | ICP | 500 | mA | |||
| Output Clamp Diode Peak Forward Current | IOK | 500 | mA | |||
| Total Emitter Peak Current | IET | -2.5 | A | |||
| Package Thermal Resistance | JA | SOP16 | 63 | /W | ||
| Package Thermal Resistance | JA | DIP16 | 50 | /W | ||
| Maximum Operating Junction Temperature | TJ | 150 | ||||
| Soldering Temperature (10s) | TW | 260 | ||||
| Storage Temperature Range | TS | -65 | +150 | |||
| Recommended Operating Conditions (TA=25 unless otherwise specified) | ||||||
| Collector-Emitter Voltage | VCE | 0 | 40 | V | ||
| Output Current | IOUT | Continuous output, TA=+85, TJ=120 | 100 | mA/ch | ||
| Input Voltage | VIN | 0 | 24 | V | ||
| Input Voltage (Output ON) | VIN(ON) | IOUT=400mA | 2.8 | 24 | V | |
| Input Voltage (Output OFF) | VIN(OFF) | 0 | 0.7 | V | ||
| Clamp Diode Reverse Voltage | VR | 40 | V | |||
| Clamp Diode Peak Forward Current | IF | 350 | mA | |||
| Operating Temperature Range | TA | -20 | +85 | |||
| Operating Junction Temperature | TJ | -20 | +125 | |||
| Power Dissipation | PD | SOP16, TA=+25 | 1.25 | W | ||
| Power Dissipation | PD | SOP16, TA=+85 | 0.65 | W | ||
| Power Dissipation | PD | DIP16, TA=+25 | 1.47 | W | ||
| Power Dissipation | PD | DIP16, TA=+85 | 0.76 | W | ||
| Electrical Characteristics (TA=25 unless otherwise specified) | ||||||
| Turn-on Input Voltage | VIN(ON) | VCE=2V, IC=200mA | 1.9 | 2.4 | V | |
| Turn-on Input Voltage | VIN(ON) | VCE=2V, IC=250mA | 2 | 2.7 | V | |
| Turn-on Input Voltage | VIN(ON) | VCE=2V, IC=300mA | 2.1 | 3 | V | |
| Collector-Emitter Saturation Voltage | VCE(SAT) | VI=2.4V, IC=30mA | 0.8 | 1 | V | |
| Collector-Emitter Saturation Voltage | VCE(SAT) | VI=2.4V, IC=60mA | 0.9 | 1.1 | V | |
| Collector-Emitter Saturation Voltage | VCE(SAT) | VI=2.4V, IC=120mA | 1.0 | 1.2 | V | |
| Collector-Emitter Saturation Voltage | VCE(SAT) | VI=2.4V, IC=240mA | 1.1 | 1.4 | V | |
| Collector-Emitter Saturation Voltage | VCE(SAT) | VI=2.4V, IC=350mA | 1.3 | 1.6 | V | |
| Input Current | II | IC=60mA, VI=12V | 4 | 5.3 | mA | |
| Input Current | II | IC=60mA, VI=6V | 1.7 | 2.2 | mA | |
| Input Current | II | IC=60mA, VI=4.5V | 1.1 | 1.6 | mA | |
| Input Current | II | IC=60mA, VI=2.4V | 0.35 | 0.7 | mA | |
| Clamp Diode Forward Voltage | VF | IF=350mA | 1.6 | 2 | V | |
| Collector Cut-off Leakage Current | ICEX | VCE=40V, II=0 | - | 50 | uA | |
| Collector Breakdown Voltage | VCE | VCE=40V, II=0 | 40 | V | ||
| Clamp Diode Reverse Leakage Current | IR | VR=40V | - | 50 | uA | |
| Clamp Diode Reverse Breakdown Voltage | VR | VR=40V | 40 | V | ||
| Propagation Delay Low-to-High | tPLH | VL=12V, RL=45 | 0.15 | 1 | us | |
| Propagation Delay High-to-Low | tPHL | VL=12V, RL=45 | 0.15 | 1 | us | |
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