Datasheet

ERM

LRA

OUT+

OUT–

Ch1-Ch2

(Differential)

with Digital

Low-Pass Filter

Oscilloscope

Ch1

Ch2

t − Time − s

Voltage − (2V/div)

0 40m 80m 120m 160m 200m

PWM (Filtered)

[OUT+] − [OUT−] (Filtered)

VDD = 3.6 V

LRA Mode

PWM Sequence =

{100%, 87.5%, 75%, 62.5%, 0%}

t − Time − s

Voltage − (2V/div)

0 40m 80m 120m 160m 200m

PWM (Filtered)

[OUT+] − [OUT−] (Filtered)

VDD = 3.6 V

ERM Mode

PWM Sequence =

{100%, 87.5%, 75%, 62.5%, 0%}

DRV2603

www.ti.com

SLOS754A –JUNE 2012–REVISED JANUARY 2014

TYPICAL CHARACTERISTICS (continued)

EXTRA LINES FOR SPACING

LRA PWM Modulation ERM PWM Modulation

Figure 5. Figure 6.

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TEST SETUP FOR GRAPHS

With no output filter, the output waveform from the DRV2603 looks similar to Figure 1. The output signal contains

both a high frequency PWM component and a fundamental drive component which causes motion in the

actuator. To measure or observe the fundamental drive component, a low-pass filter must be used to eliminate

the PWM component. The digital filter function on a digital oscilloscope was utilized in the rest of the Typical

Characteristic figures. A 1

order, low-pass filter corner between 1 kHz and 3.5 kHz is recommended.

Figure 7. Test Setup for Graphs

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Product Folder Links :DRV2603