IDCHIP ULN2803 High Current Darlington Transistor Array Designed for Stepper Motor and Relay Driving
Key Attributes
Model Number:
ULN2803
Product Custom Attributes
Current - Collector(Ic):
500mA
Collector - Emitter Voltage VCEO:
-
Mfr. Part #:
ULN2803
Package:
SSOP-24
Product Description
Product Overview
The ULN2803 is a high-current Darlington transistor array designed for low-voltage systems. It comprises eight Darlington pairs, each with a free-wheeling diode, suitable for driving inductive loads such as relays and stepper motors. Each Darlington pair supports an output current of 200mA at an input voltage as low as 1.8V. Connecting Darlington pairs in parallel increases the output current capability. Each Darlington pair in the ULN2803 includes a base resistor, allowing direct connection to TTL/CMOS circuits with operating voltages below 5V, eliminating the need for standard logic buffers. Additionally, each input pin has an internal 4.7K ohm pull-down resistor to ground, preventing unstable states of the Darlington transistors during MCU power-up.
Product Features
- Supports 1.8V low-voltage input
- Each channel collector output current: 500mA
- Input compatible with TTL/CMOS logic signals
- SSOP-24 package
Product Applications
- Display driver
- Relay driver
- Indicator light driver
- Stepper motor driver
Ordering Information
| Product Model | Package | Packaging |
| ULN2803 | SSOP-24 | 2500/ |
Technical Specifications
| Parameter | Symbol | Test Conditions | Min | Typical | Max | Unit |
| Absolute Maximum Ratings | ||||||
| Input Voltage | VIN | -0.5 | 7 | V | ||
| Collector-Emitter Voltage | VCE | -0.5 | 15 | V | ||
| COM Terminal Voltage | VCOM | 15 | V | |||
| Collector Peak Current | ICP | /ch | 500 | mA | ||
| Output Clamp Diode Forward Peak Current | IOK | 500 | mA | |||
| Total Emitter Max Peak Current | IET | -2.0 | A | |||
| Storage Temperature | TS | -60 | 150 | |||
| Junction Temperature | TJ | 150 | ||||
| Soldering Temperature | TL | (within 10 seconds) | 260 | |||
| Recommended Operating Conditions (TA=25 unless otherwise specified) | ||||||
| Operating Temperature | Topr | -40 | 85 | |||
| Input Voltage (Output ON) | VIN(ON) | 2 | 7 | V | ||
| Input Voltage (Output OFF) | VIN(OFF) | 0 | 0.6 | V | ||
| Input Voltage (Control Signal) | VIN | 0 | 7 | V | ||
| Collector-Emitter Voltage | VCE | 0 | 12 | V | ||
| Clamp Diode Reverse Voltage | VR | 18 | V | |||
| Clamp Diode Forward Peak Current | IF | 350 | mA | |||
| Output Current | IOUT | TPW=25ms,TA=85,TJ=120,Duty=10% | 350 | mA/ch | ||
| TPW=25ms,TA=85,TJ=120,Duty=50% | 70 | |||||
| Electrical Characteristics (TA=25 unless otherwise specified) | ||||||
| Input Voltage (Output ON) | VIN(ON) | VCE=1.5V,IC=250mA | 1.75 | 1.85 | V | |
| VCE=1.5V,IC=350mA | 1.85 | 2.0 | ||||
| Input Current | IIN | VIN=3.3V,IC=250mA | 2.2 | 2.8 | mA | |
| VIN=3.3V,IC=250mA | 1.5 | 2.0 | ||||
| VIN=3.3V,IC=250mA | 0.6 | 1.2 | ||||
| Collector-Emitter Saturation Voltage | VCE(sat) | VIN=1.8V,IC=250mA | 1.0 | 1.2 | V | |
| VIN=1.8V,IC=350mA | 1.15 | 1.3 | ||||
| VIN=3.3V,IC=500mA | 1.3 | 1.6 | ||||
| Clamp Diode Forward Voltage | VF | IF=350mA | 1.4 | 1.6 | V | |
| Clamp Diode Reverse Current | IR | VR=12V | 100 | A | ||
| Collector Cutoff Leakage Current | ICEX | VCE=12V,IIN=0 | 50 | A | ||
| VCE=12V,VIN=0V | 100 | |||||
| Input Capacitance | CIN | 15 | pF | |||
| Propagation Delay (Low-to-High) | tPLH | VL=5V,RL=45 | 0.15 | 1 | s | |
| Propagation Delay (High-to-Low) | tPHL | VL=5V,RL=45 | 0.15 | 1 | s | |
2303010930_IDCHIP-ULN2803_C5359735.pdf
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