DRV2605L Datasheet, PDF (52/69 Pages) Texas Instruments – DRV2605L 2 to 5.2 V Haptic Driver for LRA and ERM With Effect Library and Smart-Loop Architecture

DRV2605L
SLOS854C – MAY 2014 – REVISED SEPTEMBER 2014
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 DRV2605L 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) or
can decide to use the PWM interface. Figure 58 shows a typical haptic system implementation. The system
designer should not use the internal regulator (REG) to power any external load.
A system designer can also implement audio-to-vibe. Figure 59 shows a typical haptic system implementation
supporting audio-to-vibe.
Application
Processor
SCL
SDA
GPIO
PWM/GPIO
R_(PU) R_(PU)
SCL
DRV2605L
OUT+
REG
SDA
OUT±
EN
IN/TRIG
V_DD
GND
C_(REG)
M
LRA or
ERM
2 V ± 5.2 V
C_(VDD)
Figure 58. I²C Control with Optional PWM Input or External Trigger
Application
Processor
SCL
SDA
GPIO
ANALOG
R_(PU) R_(PU)
SCL
DRV2605L
OUT+
REG
SDA
OUT±
C_(IN)
(optional)
EN
IN/TRIG
V_DD
GND
C_(REG)
M
LRA or
ERM
2 V ± 5.2 V
C_(VDD)
Figure 59. I²C Control With Audio-to-Vibe Input and Optional AC Coupling
COMPONENT
C_(VDD)
C_(REG)
C_(IN)
R_(PU)
Table 32. Recommended External Components
DESCRIPTION
Input capacitor
Regulator capacitor
AC coupling capacitor (optional)
Pullup resistor
SPECIFICATION
Capacitance
Capacitance
Capacitance
Resistance
TYPICAL VALUE
0.1 µF
1 µF
1 µF
2.2 kΩ
52
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