Eight channel Darlington transistor array BL ULN2803 designed for driving relays solenoids and LED displays

Product Overview

The ULN2803 is a high-voltage, high-current Darlington transistor array featuring eight open-collector common-emitter pairs, each rated at 500mA. Designed for driving a wide range of inductive loads, it includes output clamp diodes and inputs compatible with various logic types. Its pinout opposition simplifies board layout, making it suitable for applications such as relay drivers, solenoids, DC motors, LED displays, filament lamps, thermal print-heads, and high-power buffers. Available in SOP18 and QFN20(4x4) packages.

Product Attributes

• Brand: Belling
• Model Series: ULN2803

Technical Specifications

Model	Package	Collector Current (Single Output)	High-Voltage Outputs	Input Compatibility	Output Clamp Diodes	Ordering Information
ULN2803	SOP18	500 mA	50 V	Various Types of Logic	Included	ULN2803 (Tape and Reel, 1500)
ULN2803QN	QFN20(4x4)	500 mA	50 V	Various Types of Logic	Included	ULN2803QN (Tape and Reel, 3000)

Electrical Characteristics

Parameter	Test Conditions	Min	Typ	Max	Unit
VCE(sat) (Collector-emitter saturation voltage)	II = 250 A, IC = 100 mA	--	0.9	1.1	V
VCE(sat) (Collector-emitter saturation voltage)	II = 350 A, IC = 200 mA	--	1	1.3	V
VCE(sat) (Collector-emitter saturation voltage)	II = 500 A, IC = 350 mA	--	1.2	1.6	V
ICEX (Collector cutoff current)	VCE = 50 V, II = 0	--	--	50	A
ICEX (Collector cutoff current)	VCE = 50 V, TA = +105C, II = 0	--	--	100	A
VF (Clamp forward voltage)	IF = 350 mA	--	1.7	2	V
II (Input current)	VI = 3.85 V	--	0.93	1.35	mA
IR (Clamp reverse current)	VR = 50 V	--	--	50	A
Ci (Input capacitance)	VI = 0, f = 1 MHz	--	15	25	pF

Switching Characteristics

Parameter	Test Conditions	Min	Typ	Max	Unit
tPLH (Propagation delay time, low- to high-level output)	See Figure 9	0.25	--	1	s
tPHL (Propagation delay time, high- to low-level output)	See Figure 9	0.25	--	1	s
VOH (High-level output voltage after switching)	VS = 50 V, IO = 300 mA, See Figure 9	VS20	--	--	mV

Absolute Maximum Ratings

Symbol	Parameter	Min	Max	Unit
VCC	Collector to emitter voltage	--	50	V
VR	Clamp diode reverse voltage	--	50	V
VI	Input voltage	--	30	V
ICP	Peak collector current	--	500	mA
IOK	Output clamp current	--	500	mA
ITE	Total emitter-terminal current	-2.5	--	A
TA	Operating free-air temperature range	-30	+105	C
TJ	Operating virtual junction temperature	--	150	C
TSTG	Storage temperature range	-40	150	C

2509291745_BL-ULN2803_C2690548.pdf