DRV2604L Datasheet, PDF (57/73 Pages) Texas Instruments – DRV2604L 2- to 5.2-V Haptic Driver for LRA and ERM with Internal Memory and Smart-Loop Architecture

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9 Application and Implementation
DRV2604L
SLOS866D – MAY 2014 – REVISED JUNE 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.
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 DRV2604L 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 59 shows a typical haptic system implementation. The system
designer should not use the internal regulator (REG) to power any external load.
Application
Processor
SCL
SDA
GPIO
PWM/GPIO
DRV2604L
OUT+
SCL
REG
SDA
OUT±
EN
IN/TRIG
V_DD
GND
C_(REG)
M
LRA or
ERM
2 V ± 5.2 V
C_(VDD)
Figure 59. I²C Control with Optional PWM Input or External Trigger
COMPONENT
C_(VDD)
C_(REG)
R_(PU)
Table 29. Recommended External Components
DESCRIPTION
Input capacitor
Regulator capacitor
Pullup resistor
SPECIFICATION
Capacitance
Capacitance
Resistance
TYPICAL VALUE
0.1 µF
1 µF
2.2 kΩ
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