8 Application and Implementation

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 must 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

that makes the decision on when to execute haptic effects.

The DRV2665 device is configured and can be used fully with I2C communication to stream or launch haptic

effects. Additionally, the system designer may decide to use the analog input to stream the desired haptic

effects.

VDD

REG

SDA

SCL

IN+

IN-

PUMP

GND

SW

BST

PVDD

FB

OUT+

OUT-

REXT

L1

RPU

RPU

3.3 V to 5.5 V

Piezo

Actuator

C(VDD)

Cbulk

C(REG)

R1

R2

C(BST)

R(EXT)

C(PUMP)

C(IN)

C(IN)

Application

Processor

DAC

SDA

SCL

Optional

Figure 8-1. Typical Application Configuration

Table 8-1. Recommended External Components

COMPONENT

DESCRIPTION

SPECIFICATION

TYPICAL VALUE

C(VDD)

Input capacitor

Capacitance

1 µF

C(REG)

Regulator capacitor

Capacitance

0.1 µF

C(BST)

Boost capacitor

Capacitance

0.1 µF

CBULK

Bulk capacitor

Capacitance

10 µF

C(PUMP)

Internal charge pump capacitor

Capacitance

0.1 µF

C(IN)

AC coupling capacitor (optional)

Capacitance

1 µF

R1

Boost feedback resistor

(see Section 7.5.1)

Resistance

768 kΩ

R2

Boost feedback resistor

(see Section 7.5.1)

Resistance

9.76 kΩ

R2

Current limit resistor

(see Section 7.5.2)

Resistance

13 kΩ

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DRV2665

SLOS740C – MAY 2012 – REVISED JANUARY 2023

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