Rainbow-electronics MAX11835 Manual do Utilizador descarregar pdf (Página 1)

PRELIMINARY

_______________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX11835

Haptic Piezo Controller with I

C Interface

19-xxxx; Rev 0; 1/10

General Description

The MAX11835 haptic (tactile) piezo controller provides

a complete solution to drive ceramic piezo actuators

to create haptic feedback for products featuring user

touch interfaces. The MAX11835 can drive single-layer

or multilayer piezo actuators over a wide range of volt-

ages up to 250V. It efficiently generates any type of user-

programmable waveforms including sine, trapezoidal,

square, and pulse to drive the piezo loads to create cus-

tom haptic sensations. The low-power MAX11835 direct-

ly interfaces with an application processor/host controller

through a standard serial interface and integrates vari-

ous blocks including a boost regulator, pattern storage

memory, and waveform generator block in one package,

thus providing a complete piezo driver solution.

The MAX11835 contains a boost regulator that uses

an external flyback to efficiently generate high-voltage

waveforms up to 250V to drive piezo actuators while lim-

iting current drain. The boost regulator features an inter-

nal n-channel MOSFET to set current limit and control the

drain from the battery or power supply.

The MAX11835 features user-programmable touch feed-

back pattern storage memory that drives the waveform

generator with piecewise linear data using 8-bit resolu-

tion. The device also offers a trigger feature that makes

it possible to use multiple haptic piezo controllers in

parallel to provide haptic sensations for larger displays.

Its smart, low-power, and standby modes reduce power

consumption before, during, and after waveform genera-

tion. The MAX11835 goes into low-power mode after a

haptic event to save power automatically.

The MAX11835 offers a fast 400kHz, I

C serial interface

to allow programming of various modes of operation,

status checking, and haptic waveforms. The operating

supply range includes 1.7V to 3.6V for digital supply and

2.7V to 5.25V for V

BATT

and A

VDD

Applications

Features

• DrivesSingle-LayerPiezoorMultilayerActuators

withWaveformPeakVoltagesupto250V

• CreatesCustom,User-ProgrammableWaveforms

withUpto8-BitResolution

• AutomaticHapticsCreationWithouttheNeedfor

ApplicationProcessorIntervention

• AudioInputMode

• On-Chip,DCBoostRegulator

On-Chip,33V,High-VoltageBoostSwitchwith

ProgrammableMaximumPeakCurrent

 FlybackConverterGeneratesPiezoHigh-

VoltageSupply

 UndervoltageLockoutFeature

 EfficientDesigntoMinimizeDrainonBattery

Applications

• On-ChipMultipleHapticWaveformStorageUpto

192Bytes

• TRIGbtoOptionallyStartaPreprogrammed

Waveform

• DISbtoDisableorEnterLowerPowerBoost

OperationDuringPABurst

• 1.7Vto3.6VDigitalSupply

• Boost/Flybackand2.7Vto5.25VAnalogPower

Supply(V

BATT

)

• ProgrammableLow-PowerModes

 1µADeepSleepShutdownCurrent

• ThermalShutdown

• Availablein400kHzI

CInterface

S ESDProtection:±1kVHBM,±1kVCDM,±200VMM

S Lead(Pb)-Free/RoHS-CompliantPackage(0.4mm

Pitch)

Mobile Communication

Devices

PDA, GPS

Media Players,

Handheld Games

Portable Instruments

Resistive Touch-Enabled

Equipment

Capacitive Touch-Enabled

Equipment

Ordering Information



PART TEMPRANGE PIN-PACKAGE

MAX11835EWA+ -40NC to +85NC 25 WLP

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