THIS INFORMATION EMBARGOED UNTIL JULY 20 Industry’s Most Highly Integrated Piezo Haptic Driver Eric Siegel Product Marketing Engineer, Touch Screen Controllers and Haptics THIS INFORMATION EMBARGOED UNTIL JULY 20

Cell Phones & Handhelds Portable Gaming Devices What is Haptics? Touch screens are replacing traditional user interfaces Touch screens have one major disadvantage No physical or mechanical feedback when the screen is pressed or an event occurs Loss of tactile or haptic feedback The solution is haptics…. Haptics refers to the sense of touch and is a technology that provides mechanical feedback through the use of vibrations to simulate specific events or effects. Benefits of Haptics Improves task performance Increases user satisfaction Provides a more realistic experience Cell Phones & Handhelds Tablets Laptops & Desktops Portable Gaming Devices Touch Screen Markets Cell phones and handhelds Tablets Laptops and desktops Portable gaming devices Advantages of Touch screens over traditional hardware (ie – keyboard and mouse) Direct interaction with on-screen content In game controls Directly highlight and edit documents Rich input and gesture vocabulary Improved mechanical durability over traditional keyboard No moving parts No more replacing track balls, keys, or the like Flexibility provided by a dynamic display Manufacturer and user customizations Application specific customizations Touch screens have one major disadvantage No physical or mechanical feedback when the screen is pressed. Increased errors with text entry 2

Touch Panel and Display Touch ecosystem Touch Panel and Display Applications Processor/ Chipset reference design Haptics SW TSC Haptics Driver Touch Location Haptics effects Haptics actuators Touch Screen Controller Haptics Driver Talking Points Here we can see the typical touch ecosystem. It starts at the touch screen when a touch is detected. The coordinates of the touch are deciphered and sent to the applications processors. The Apps processor then does whatever operation is necessary in reaction to the touch. If haptics is part of the equation, a haptics acknowledgement command is sent to the haptics driver. The driver in turn drives the haptics actuators. Note: The software for the waveform can be stored on the apps processor or the driver depending on topology. Note: Haptics Software stored in only one of two locations THIS INFORMATION EMBARGOED UNTIL JULY 20

Piezo actuator-based haptics Enables high-definition and localized Haptics effect generation Piezo actuators are very thin (<1mm) Piezo actuators are either single-layer or multi-layer Single Layer Need up to 200 Vp-p to drive More cost effective Have low capacitance and can be driven with lower current Multi-layer Need up to 50Vp-p to drive multi-layer piezos Cost scales linearly with the number of piezo layers Have high capacitance and needs higher current drive Talking Points Piezo-based actuators offer many improved benefits over motor-based actuators. In general, single layer haptics are a more cost-effective solution; however, you’ll have a higher Peak-to-Peak Voltage (VP-P) vs. the multilayer piezo modules, which due to the higher density of layers, lowers the drive voltage but drives up the cost. It should be noted that there are some differences in operation for piezo beams vs. disks: Only one bender is necessary for most touch screen devices up to around 7-8 inches. Disks require four disks for uniform screen displacement. Bender displacement of the screen is parallel to the screen Disk displacement is perpendicular in the z direction.

Introducing the DRV8662 Industry’s most integrated single-chip piezo haptic driver High analog integration (boost converter, diode) 50% smaller solution size than leading competition Does not need an external transformer 40% lower system solution cost than leading competition Analog input Can be driven by DAC or filtered pulse width modulation (PWM) GPIO gain control Supports wide range of piezo actuator voltages 50-200 - volt peak to peak (Vpp) differential outputs Drive high-definition inaudible haptics effects Haptics frequencies up to 500-Hz Enables wide variety of high-resolution haptics effects Talking Points The DRV8662 offers a refreshed and innovative solution to driving piezo actuators vs. the leading competitors solution. Highlights include: Read bullets. THIS INFORMATION EMBARGOED UNTIL JULY 20

Feel the difference Localized responses on the screen Pluck a string on your guitar app and feel the frequency associated with that string, in the exact spot you’re touching Get haptic feedback from the smallest actions onscreen Feel each time your “bird missile” ruffles its feathers or slams into the wooden blocks Talking Points How exactly do piezo-based actuators make a difference? Imagine playing your guitar app on your android phone and instead of just hearing the tone associated with each string, you feel the exact frequency associated with it as well. Or think about the next time you play Angry Birds. You can feel each bird’s impact as it crashes through to defeat the evil pigs. Outside of the consumer realm, think about a worker in an industrial setting working with dangerous machinery. With localized haptics feedback, he can reach back to a touch screen, get a vibration acknowledging his touch, and never have to look away from the machine. THIS INFORMATION EMBARGOED UNTIL JULY 20

Applications Talking Points The DRV8662 is targeted toward a number of applications, including: Laptops Digital cameras Portable gaming consoles E-books Home Appliances Industrial Equipment Joysticks Mp3 players Cell phones and smartphones

Actuator response Inertial Piezo Response and accuracy of haptics effects Inertial Low bandwidth Start-up and response times are slower Lower bandwidth limits types of effects Motor (ERM) or linear actuator (LRA) DRV8601 Piezo High bandwidth Fastest response time and largest bandwidth Wider range of effects Piezo bender or piezo module DRV8662 Talking Points Let’s take a look at the response of two types of actuators. For practical purposes, let’s group them into two categories, inertial-based (or ERMs and LRAs) and Piezo. Inertial-based solutions tend to be bandwidth limited, with slower start-up and response times. As a result, they provide lower-resolution haptics effects. Piezo-based modules do not suffer from the same limits as inertial-based actuators, and have an extremely fast response time and wide range amplitude outputs, contributing to the ability to create a wide range of detailed high resolution effects. These are the effects that you can find in applications with the DRV8662. THIS INFORMATION EMBARGOED UNTIL JULY 20

Bandwidth profiles ERM ERM/ LRA Piezo direct drive Piezo pulsing Piezo actuators offer higher bandwidth than inertial actuators Frequency Strength Piezo direct drive Piezo pulsing ERM spinning ERM/ LRA pulsing LRA direct drive ERM – can either be driven using pulses or continuously driven at a specific voltage; however, when the ERM is driven with a single voltage the amplitude and frequency cannot be varied independently. LRA – the LRA can be driven using pulses or amplitude modulate; however, the carrier frequency must always be the resonant frequency (175 Hz) Piezo – can be driven using pulses or directly driven with a specific frequency, giving it the largest bandwidth. 50Hz 175Hz 300Hz

Response time of the DRV8662 Inertial Actuators vs. Piezo Actuators <1ms ~30-60ms Faster response time Piezo (DRV8662) ERM, LRA Strength Talking Points Here you can see the response time of each type of actuator. The inertial-based ERMs and LRAs have a more delayed response time of 30-60ms The piezo-based actuators, driven by the DRV8662, have < 1ms response time, making them very suitable for typing applications in tablets and portable devices such as handsets or gaming systems. Time THIS INFORMATION EMBARGOED UNTIL JULY 20

TI DRV8662 Integrated, high-voltage process solution Competition vs. DRV8662 Competition’s flyback solution TI DRV8662 Integrated, high-voltage process solution Low voltage process Transformer – bulky, expensive External FET External eiode Difficult charge/discharge control schemes that are separated Total board space ~200mm2 High voltage process Transformer-less Integrated FET Integrated diode Simple Op-Amp voltage controlled feedback allowing adjustable gain Total Board Space ~100mm2 Talking Points The leading competing solution for piezo-based haptics is what is known as a “flyback” solution. It is constructed using a low-voltage process, which requires a bulky transformer. Furthermore, the FET and diode are not integrated and the total board space is significantly large (~120mm2) Due to TI’s high-voltage process, the DRV8662 does not require an external transformer, and contains an integrated FET and diode, vastly reducing system cost and creating a footprint of almost half the area of the flyback solution.

DRV8662 evaluation kit Complete Haptics Evaluation Touch panel glass with Piezo Actuator assembly MSP430G2253 DRV8662 Complete Haptics Evaluation I2C Interface through MSP430 Analog / PWM input option to the DRV8662 with I2C bypass Programmable MSP430 with sample code DRV8662 EVMs will be available at time of launch as well as a reference design that can be incorporated into any current design with schematics and design files available on ti.com. The EVM will also come with a Piezo module that allows you to evaluate and see the benefits of the piezo experience. THIS INFORMATION EMBARGOED UNTIL JULY 26

Flexible architecture Summary Small solution size 50% smaller with no external transformer Low solution cost 40% lower cost with no expensive external transformer 50 to 200-Vpp differential drive High-definition haptics effects Flexible architecture Can drive single or multi-layer piezo actuators Talking Points The DRV8662 opens the doors for great innovation and user experience by enabling piezo-based haptics effects.

For your readers DRV8662 Product Folder “What is haptics?” video www.ti.com/drv8662-pr “What is haptics?” video www.ti.com/drv8662video-pr Technical support for touch products www.ti.com/touchforum-pr

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