DRV2603_14 Datasheet, PDF (6/19 Pages) Texas Instruments – Haptic Drive with Auto-Resonance Detection for Linear Resonance Actuators (LRA)

DRV2603
SLOS754A – JUNE 2012 – REVISED JANUARY 2014
www.ti.com
TYPICAL CHARACTERISTICS (continued)
ALTERNATE TEST SETUP
If a digital oscilloscope with digital filtering is not available, a 1^st order, low-pass, RC filter network can be used
instead. Care must be taken not to use a filter impedance that is too low. This can interfere with the back-EMF
behavior of the actuator and corrupt the operation of the auto resonance function. A recommended circuit is
shown in Figure 8.
OUT+
100kΩ
OUT–
ERM
Or
LRA
100kΩ
470 pF
470 pF
Ch1
Ch1-Ch2
Ch2 ^{(Differential)}
Oscilloscope
SYSTEM DIAGRAMS
Application
Processor
GPIO
PWM
VDD
Figure 8. Alternate Test Setup
DRV2603
EN
PWM
LRA / ERM
OUT+
GND
VDD
OUT-
2.5 V to 5.2 V
C_VDD
Figure 9. System Diagram for LRA
Application
Processor
GPIO
PWM
GND
DRV2603
EN
PWM
LRA / ERM
OUT+
GND
VDD
OUT-
2.5 V to 5.2 V
C_VDD
Figure 10. System Diagram for ERM
Linear Vibrator
(LRA)
DC Motor
(ERM)
6
Submit Documentation Feedback
Product Folder Links :DRV2603
Copyright © 2012–2014, Texas Instruments Incorporated