DRV2624 Datasheet, PDF (62/79 Pages) Texas Instruments – DRV2624 Ultra Low Power Closed-Loop LRA/ERM Haptic Driver with Internal Memory

DRV2624
SLOS893A – DECEMBER 2015 – REVISED DECEMBER 2015
9 Application and Implementation
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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
The typical application for a haptic driver is in a touch-enabled system that already has an application processor
which makes the decision on when to execute haptic effects.
The DRV2624 device can be used fully with I²C communications (either using RTP or the memory interface). A
system designer can chose to use external triggers to play low-latency effects (such as from a physical button).
Figure 95 and Figure 96 show typical haptic system implementations. The system designer should not use the
internal regulator (REG) to power any external load.
Application
Processor
SCL
SDA
GPIO
GPIO
R_(PU) R_(PU)
SCL
DRV2624
OUT+
REG
SDA
OUT±
NRST
TRIG/INTZ
V_DD
GND
C_(REG)
M
LRA or
ERM
2.7 V ± 5.5 V
C_(VDD)
Figure 95. I²C Control with Optional External Trigger
COMPONENT
C_(VDD)
C_(REG)
R_(PU)
Application
Processor
SCL
SDA
GPIO
GPIO
R_(PU) R_(PU) R_(PU)
SCL
DRV2624
OUT+
REG
SDA
OUT±
NRST
TRIG/INTZ
V_DD
GND
C_(REG)
M
LRA or
ERM
2.7 V ± 5.5 V
C_(VDD)
Figure 96. I²C Control with Optional Interrupt Pin
Table 52. Recommended External Components
DESCRIPTION
Input capacitor
Regulator capacitor
Pull-up resistor
SPECIFICATION
Capacitance
Capacitance
Resistance
TYPICAL VALUE
0.1 µF
0.1 µF
2.2 kΩ
62
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