IN1

IN2

ULQ2003A-Q1

IN3

IN4

OUT1

OUT2

OUT3

OUT4

IN5

IN6

IN7

GND

OUT5

OUT6

OUT7

COM

3.3-V Logic

3.3-V Logic

3.3-V Logic

ULQ2003A-Q1, ULQ2004A-Q1

www.ti.com

SGLS148E – DECEMBER 2002 – REVISED DECEMBER 2015

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

Typically, the ULQ200xA-Q1 device drives a high-voltage or high-current (or both) peripheral from an MCU or

logic device that cannot tolerate these conditions. This design is a common application of ULQ200xA-Q1 device,

driving inductive loads. This includes motors, solenoids and relays. Figure 15 shows an example of driving

multiple inductive loads.

9.2 Typical Application

Figure 15. ULQ2003A-Q1 Device as Inductive Load Driver

9.2.1 Design Requirements

For this design example, use the parameters listed in Table 1 as the input parameters.

Table 1. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

GPIO voltage

3.3 V or 5 V

Coil supply voltage

12 V to 48 V

Number of channels

7

20 mA to 300 mA per channel

Duty cycle

100%

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