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ULN2803ADW
+StücklisteTRANS 8NPN DARL 50V 0.5A 18SOIC
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HerstellerTexas Instruments
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Herstellerteil #ULN2803ADW
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Auf Lager6328
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Spezifikationen
| Attribut | Wert |
| Part Status | Obsolete |
| Base Product Number | ULN2803 |
| Transistor Type | 8 NPN Darlington |
| Current - Collector (Ic) (Max) | 500mA |
| Voltage - Collector Emitter Breakdown (Max) | 50V |
| Vce Saturation (Max) @ Ib, Ic | 1.6V @ 500µA, 350mA |
| Current - Collector Cutoff (Max) | 50µA |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
| Package | 18-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 18-SOIC |
| Packaging | Tube |
Übersicht
Description
### Key Features:
- 8 Darlington pairs (50V, 500mA per channel).
- High-voltage, high-current switching.
- Inputs compatible with TTL, CMOS, and 5V logic.
- Common-cathode clamp diodes for inductive kickback protection.
### Applications:
- Relay/stepper motor drivers.
- LED displays.
- Logic buffering.
### Package:
- SOIC-18 (DW) surface-mount package.
The ULN2803ADW simplifies interfacing low-power logic with high-power devices, making it a popular choice for embedded systems.
Equivalent
- ULN2803A (same series, different package)
- ULN2804A (similar, with built-in clamp diodes)
- MC1413 (Motorola/NXP equivalent)
- TD62083AP (Toshiba equivalent)
- KA2803 (Samsung equivalent)
These are all 8-channel Darlington transistor arrays with similar specs (50V, 500mA per channel). Check datasheets for exact compatibility.
Pinout
Key Functions:
- Contains eight NPN Darlington pairs (each rated for 500mA, 50V) with common emitters.
- Integrated clamp diodes for inductive load protection.
- Inputs are TTL/CMOS compatible (5V logic).
- Outputs can sink current (suitable for relays, LEDs, motors).
Pinout Highlights:
- Pins 1–8: Inputs (IN1–IN8).
- Pins 10–17: Outputs (OUT1–OUT8).
- Pin 9: Common ground for clamp diodes.
- Pin 18: Common emitter (ground for Darlington pairs).
Package: SOIC-18 (surface-mount).
Typical Use: Relay/motor drivers, LED displays, or logic buffering.
Manufacturer
Application
1. Relay and Solenoid Control – Acts as an interface between low-power logic (e.g., microcontrollers) and inductive loads.
2. Stepper Motor Driving – Provides the necessary current for unipolar stepper motors.
3. LED Displays – Drives multiple LEDs or LED matrices requiring higher current.
4. Industrial Automation – Controls actuators, lamps, and other peripherals in automated systems.
5. Consumer Electronics – Used in printers, appliances, and other devices needing load switching.
Its built-in clamp diodes protect against back EMF, making it ideal for inductive loads.
Package
Frequently Asked Questions
Q: What is the maximum current each Darlington pair can handle?
A: Each of the 8 NPN Darlington transistors can handle a maximum collector current (Ic) of 500mA.
Q: What is the maximum voltage this IC can switch?
A: The maximum collector-emitter breakdown voltage is 50V, allowing it to drive 5V, 12V, or 24V loads.
Q: Can this device work with TTL or 5V logic inputs?
A: Yes, it features TTL-compatible inputs, making it ideal for direct interface with microcontrollers or 5V logic.
Q: What is the typical saturation voltage for driving a load?
A: At 350mA load current and 500μA base current, the Vce saturation voltage is typically 1.6V max.
Q: Is this component suitable for harsh environments?
A: Yes, its operating temperature range is -40°C to 125°C, ensuring reliable performance in industrial applications.
Q: What is the leakage current when the transistor is off?
A: The maximum collector cutoff current is 50μA, ensuring minimal power loss when the output is disabled.
Q: Can this IC drive inductive loads like relays or solenoids?
A: Yes, it includes built-in clamping diodes for inductive load protection, ideal for relays and motors.
