DRV2605L-Q1 Datasheet, PDF (51/67 Pages) Texas Instruments – Automotive Haptic Driver for LRA and ERM

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8 Application and Implementation
DRV2605L-Q1
SLOS874A – OCTOBER 2015 – REVISED OCTOBER 2015
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.
8.1 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-Q1 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 57 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 58 shows a typical haptic system implementation
supporting audio-to-vibe.
Application
Processor
SCL
SDA
GPIO
PWM/GPIO
DRV2605L-Q1
R_(PU) R_(PU)
OUT+
SCL
REG
SDA
OUT±
EN
IN/TRIG
V_DD
GND
C_(REG)
M
LRA or
ERM
Li-ion or Boost
C_(VDD)
Figure 57. I²C Control with Optional PWM Input or External Trigger
DRV2605L-Q1
Application
Processor ^{Rpu Rpu}
SCL
SDA
GPIO
ANALOG
C_IN
optional
SCL
SDA
EN
IN/TRIG
OUT+
REG
OUT-
VDD
GND
C_reg
LRA
M or
ERM
2 V ± 5.2 V
C_VDD
Figure 58. 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
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