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IDCHIP ULN2803 High Current Darlington Transistor Array Designed for Stepper Motor and Relay Driving

Categories	Bipolar Transistor Arrays
Current - Collector(Ic):	500mA
Collector - Emitter Voltage VCEO:	-
Description:	500mA SSOP-24 Bipolar Transistor Arrays RoHS
Mfr. Part #:	ULN2803
Model Number:	ULN2803
Package:	SSOP-24

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IDCHIP ULN2803 High Current Darlington Transistor Array Designed for Stepper Motor and Relay Driving

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
Output Current	IOUT	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

IDCHIP ULN2803 High Current Darlington Transistor Array Designed for Stepper Motor and Relay Driving

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