Eight channel Darlington array GR ULN2803Q designed for relay lighting and display screen LED driving
Product Overview
The ULN2803 is a monolithic integrated high-voltage, high-current Darlington array. It internally contains eight independent Darlington driver circuits, each with a clamp diode for driving inductive loads such as relays and stepping motors. By paralleling the Darlington transistors, higher output current capability can be achieved. This circuit is widely applicable in relay driving, lighting driving, display screen driving (LED), stepping motor driving, and as logic buffers. Each Darlington driver in the ULN2803 has a 2.7K base resistor, allowing direct connection to TTL/CMOS circuits at a 5V operating voltage, enabling it to directly process data handled by standard logic buffers.
Product Attributes
- Brand: ULN2803
- Origin:
Technical Specifications
| Parameter | Symbol | Limit Value | Unit | Notes |
| Input Voltage | VIN | 30 | V | |
| Output Off-State Voltage | VCE | 50 | V | Ta=25 |
| Maximum Output Current | IC | 500 | mA | Ta=25 |
| Input Compatibility | TTL/CMOS logic signals | |||
| Operating Temperature | TA | -4085 | ||
| Storage Temperature | TS | -65150 | ||
| Soldering Temperature | TW | 260,10s | ||
| Output Leakage Current | ICEX | 0~50 | A | VCE =50V, Ta=25 |
| Output Low Level Voltage | VCE(SAT) | 1.0~1.6 | V | IOUT =350mA, IIN=500A |
| Input Current (ON) | IIN(ON) | 0.7~1.35 | mA | VIN=3.85V, IOUT =350mA |
| Input Current (OFF) | IIN(OFF) | 50~63 | A | IOUT =500A, Ta=85 |
| Input Voltage (ON) | VIN(ON) | 1.8~2.4 | V | VCE =2V, IOUT =200mA |
| Clamp Diode Reverse Leakage Current | IR | 0~50 | A | VR=50V, Ta=25 |
| Clamp Diode Voltage Drop | VF | 1.7~2.0 | V | IF=350mA, Ta=25 |
| Turn-on Delay Time | tON | 0.1~1 | s | VOUT=50V,RL=125,CL=15pF |
| Turn-off Delay Time | tOFF | 0.2~1 | s | VOUT=50V,RL=125,CL=15pF |
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