Introduction to IDT Wireless Power IC Solutions (Inductive Charging)

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Information about Introduction to IDT Wireless Power IC Solutions (Inductive Charging)

Published on February 19, 2014

Author: idt



Introduction to inductive wireless power and IDT's new best-in-class wireless power transmitter and receiver IC solutions designed for Wireless Power Consortium (WPC) Qi compliance. IDT's ICs facilitate inductive charging between charging station (power mat) and mobile battery (smartphone). Covered topics include technology overview, potential applications, and an overview of IDT's offerings and comparisons to other competitive offerings. Presented by Eric Itakura, Product Marketing Director, Integrated Device Technology, Inc. Learn more at

IDT Wireless Power Solution March 2012 ©2012 Integrated Device Technology, Inc.

Wireless Power Overview PAGE 2

Why Wireless Power? ● Charging Anywhere and Everywhere, without Cords and Wires for Laptops, Mobile Phones, Tablets, e-Readers, and Media Players ● Simply place device on charging mat or wireless power enabled surface ● Alternative to Carrying Collection of Device-Specific Chargers ● >800 Million wireless power transmitters and Receivers Forecast for 2015 (iSuppli) ● $24B market size in 2015 (iSuppli) ● Samsung, Motorola, LG, HTC, Fujitsu, NEC and Sharp All Have Qi-Compatible Mobile Phones PAGE 3

Industry-Accepted Standardization • Standardization increases consumer confidence and demand • Qi “ 气” (Chee: “Vital Energy” in Asian Philosophy - An Intangible Flow of Power 无形的能量 ) ● Industry standard developed by Wireless Power Consortium (WPC) • Rapid industry-wide adoption (100+ Members by Oct. 2011) PAGE 4

Wide Range of Applications Wide Range of Mobile Devices Mobile Phone ● Tablet ● Camera ● MP3 Player ● MID (Mobile Intelligent Device) ● Battery charging, or other suitable loads ● Wide Range of Locations Office ● Residential (bedroom, kitchen, family area, bathroom…) ● Hotels ● Coffee Shops ● Public Waiting Areas ● Educational (schools, universities, libraries….) ● Airports ● Aircraft Seats ● Medical ● Automotive ● Theaters ● Restaurants ● PAGE 5

Application Solution Examples PAGE 6

Technology Overview and System Operation PAGE 7

Inductive Wireless Power Transfer dB/dt • • • • • Power Transfer via Inductive Coupling at Short Distances (mm) Transmitter (Tx) and Receiver (Rx) Coils are Inductively Coupled Coils o AC current in Tx coil generates magnetic field, which induces a voltage in Rx coil. Rx voltage may be used to power a mobile device or charge a battery Magnetic Field Concentrated in Small Volume Between Tx/Rx User Exposed to Leakage Fields Only, which are Minimized by Shielding Improve Coupling between Coils by  Matching coil sizes  Flat interface surface to keep the distance small.  Shielding and aligning coils PAGE 8 I Rx Coil Shielding Rx Surface Tx Surface Distance Tx Coil Shielding

Wireless Power System Transmitter (Tx) ● Receives ● ● ● ● Sends Digital Messages From the Receiver chip Through AC load modulation ● Adjusts ● ● Recovers Coil with AC current ● ● Messages to Transmitter Identification, Up/Down Power By modulating Load impedance ● Controls Power Output Level At request of the Receiver Maintains a stable system ● ● Received Power Matching mobile device needs To maintain an efficient system Base Station Mobile Device System Transmitter Transmitter Transmitter Control Receiver Comm DeMod Messages Reflected Load Power AC current from Coil PAGE 9 Comm Mod Control Load ● Drives Receiver (Rx)

IDTP9030 Wireless Power Transmitter (Tx) PAGE 10

IDTP9030 Wireless Power Transmitter ● Industry’s First Single Chip Solution for Wireless Power Consortium (WPC) compliant power transmitters High Eff. Synchronous Half Bridge Inverter 2 Way Secure Authentication ● Up to 7.5W Power in Proprietary Mode ● 10V to 20V Operating Input Voltage ● Programmable option for added security and encryption up to 64 bit Modulation/ Demodulation Thermal Loop Control OTP, UVLO OVP, OCP ● Advanced Foreign Object Detection (FOD) for safety Status & Power Good Indicator ● Proprietary Base to Mobile Communication for 2-Way Secure Authentication GPIO ● Highest Total System Efficiency (~73%) when used with IDTP9020 Power Receiver IC ● I2C Packages: ● 6x6-48 VFQFN RAM Proprietary Back Channel Communication High Eff. Buck Converter ADC Over Temperature/Voltage/Current Protection ● Embedded Micro Controller FOD Foreign Object Detection PAGE 11 ROM Clock

Competitive Analysis: Transmitter IC Feature IDTP9030 Leading Competitor (2 nd Gen) Single Chip Tx Yes No Power Transmission Up to 7.5W* Up to 5W Embedded uC Yes Yes Multilingual Operation Yes No Multi-Layered FOD Yes Not as many levels Back Channel Comm Yes No 2-way Authentication Yes No External BOM 30 91 Total IC’s Req’d 1 9 Board Space 360mm2 1800mm2 *Proprietary Mode PAGE 12

IDTP9030 Tx vs Competitor 2 nd Gen Tx Application Area ● Competitor: ~1800 mm2 ● IDT: 360 mm2 ● ~80% reduction in area No. of Components • Competitor: 91 w/9 IC’s • IDT: 30 (1 IC) • 67% Reduction in Component Count • 8 fewer ICs than competitor 50% Savings in Solution BOM Cost! PAGE 13

IDTP9020 Wireless Power Receiver PAGE 14

IDTP9020 Wireless Power Receiver Fully integrated single chip solution for Wireless Power Consortium (WPC) receiver with 5V regulated output up to 7.5W ● Highest total system efficiency (~73%) when used with IDTP9030 power transmitter IC ● ● Status & Power Good Indicator Embedded micro controller ● Security authentication (Optional) USB/Adaptor Control ● Advanced Foreign Object Detection (FOD) ● Programmable option for added security and encryption up to 64 bit ● Supports proprietary back channel Communication ● Over Temperature/Voltage/Current Protection ● Packages: • • 7x7-56 TQFN WLCSP Option Thermal Loop Control OTP, UVLO OVP, OCP Integrated USB adaptor switches ● Modulation/ Demodulation 2 Ways Secure Authentication Integrated high efficiency synchronous buck converter ● High Effi Synchronous Full Bridge Rectifier PAGE 15 Embedded Micro Controller RAM Proprietary Back Channel Communication High Effi Buck Converter ADC GPIO I2C Multi Layer Foreign Object Detection ROM Clock

Competitive Analysis: Receiver IC Feature IDTP9020 Leading Competitor (2 nd Gen) Single Chip Rx Yes Yes Embedded uC Yes No Power Capability Up to 7.5W* 5W Multilingual Operation Yes No Multi-Layered (4 levels) FOD Yes No High Eff. Buck Converter Yes No Back Channel Comm Yes No 2-way Authentication Yes No Integr. Current Limiter Yes No Integrated USB Switches Yes No *Proprietary Mode PAGE 16

IDT Wireless Power Industry’s First True Single Chip Tx (IDTP9030) ● Up to 7.5W power delivery (Proprietary Mode) ● One IC vs. leading competitor’s nine ICs ● 80% reduction in board size • 67% reduction in component cost ● 50% solution BOM cost savings ● Multilingual capability ● >90% DC/AC efficiency High-Power, Multilingual Single Chip Rx (IDTP9020) ● Up to 7.5W power delivery (Proprietary Mode) ● Multilingual capability ● Industry-leading efficiency (>90% AC/DC, >90% DC/DC) ● Integrated USB switches PAGE 17

IDT Wireless Power IDTP9020/IDTP9030 Synergy ● 50% more power (7.5W) for faster recharging time ● Four levels of Foreign Object Detection (FOD) for maximum safety ● Back channel/Two-way communication ● Secure authentication options PAGE 18

Questions? PAGE 19

Transcript ● Hi, my name is Eric Itakura, I'm the Director of Marketing for IDT's Analog and Power Division. Today we're going to be taking a look at IDT's offerings in the area of wireless power. ● We'll start off by taking a look at the market. We'll then look into a high-level view of the technology, and then we'll get into IDT's offerings in this area. ● Wireless power offers the promise of charging anywhere and everywhere without the need for cords, wires, or device specific chargers, simply by placing your device onto a charging mat or charging surface. This is a relatively new technology to the market. It's forecasted to grow very quickly, with iSuppli forecasting over 800 million transmitters and receivers shipped in 2015 with a value of over $24 billion. Today, you can find products supporting wireless power from such manufacturers as Motorola, Samsung, and LG, just to name a few companies.  ● Now, standardization is very critical in the early stages of technology to ensure a great user experience. The wireless power consortium, or WPC, has created a Qi standard to ensure interoperability between different devices bearing the Qi logo. There over a double hundred members of the WPC today. ● The types of products that benefit from wireless power include mobile handsets, tablets, portable media players, digital still cameras, and on the transmitter, or charging surface side, there's a huge number of applications from aftermarket charging pads to charging surfaces that get implemented in places such as hotels, coffee shops, airports, or your automobile. ● On this slide, we see a variety of different application examples. Some of these products are already out on the market, such as the iPhone chargers you see there. On the lower left, you can see a charging table in an airport, and on the upper left, you see charging coming to automobiles. So you have a charging surface in the middle of your console, and you'll be able to place your devices there to be charged. ● Now, let's take a look at a high level at some of the technology and technology components. ● Now, to start out, to be clear, the wireless power consortium, and the Qi standard and IDT are focusing on a type of wireless power called inductive charging. This involves power transfer over short distances using a transmitter coil and a receiver coil that then get coupled together. ● There are two elements to a wireless power system on the charging side. We start out with the wireless power transmitter. What the wireless part transmitter does is convert a DC input voltage into an AC power that gets then transmitted through a transmitter coil to a compatible coil on the receiver side. On the receiver side, the AC power gets converted to a DC voltage, and then gets stepped down to a lower DC voltage for inputting into a battery charger IC or charge management IC. There's oneway communication supported in the Qi standard from the receiver to the transmitter to communicate messages such as increase power, decrease power, or stop transmitting power if it's fully charged. ● Now, let's take a look at IDT's offerings starting with the IDTP9030 wireless power transmitter. ● On the slide, you see a block diagram of the different major blocks within our transmitter solution. What we're bringing to market is a few really big innovations that set ourselves apart from today's existing offerings. The first significant thing is that we are the industry's first true single-chip transmitter solution. That means that we don't require any other ICs, just a set of asset components that then enable the transmitting solution. Now, we are designed to support the WPC Qi standard, which is a 5 watt standard, but we also have options to transmit power above that to up to 7.5 watts in proprietary modes. We also support a wider voltage range than the Qi standard requires. Instead of 18 to 20 volts, you can see in the table, we offer 10 to 20 volts, so an application such as the automobile where you have 12 or 16 volt supply, and we can also support the lower voltage input. We also have other options that are enabled in our device when you use our transmitter and receiver together, including such features as programmable security, 64-bit encryption and two-way communication. So in addition to the communication channel going from receiver to transmitter, we also offer an option for the transmitter to communicate with the receiver. This can be used for authentication purposes, to name one application. We also offer multilevel foreign object detection. Foreign object detection is used to detect metallic objects that should not be on the transmitter, and that you don't want to transmit power to. On the transmitter by itself, if you use it with any other Qi-compatible device, we offer two levels of foreign object detection: Smaller objects and larger object detection. Depending upon how you want to configure our transmitter, you can either choose to still transfer power, if you have a small object on the transmitter, or you can choose to completely stop power or not initiate power transfer if you have a larger device on the transmitter. We focus on high efficiency on both the transmitter and the receiver side. On our transmitter side, the DC to AC conversion happens at an efficiency of over 90 percent. ● If we look at IDT’s solution compared to one of the leading competitors, second-generation solution, we can see that IDT offers a true single-chip transmitter, and the ability to offer, again, over the 5 watts required by Qi, up to 7.5 watts. Now, if we take a look at the fourth item in the table, this is what we call multilingual, or multimode support. And what this means is that in addition to the Qi standard, we can support proprietary protocols. One example of a proprietary protocol that's out there in the market today would be power map. We can also support other standards that are defined by end customers where they want to add unique features that the Qi standard isn't currently define in their specifications. I mentioned the multilayer FOD, back channel communication and authentication, and on the next slide, I'm going to get into the implications and the positive benefits of having a true single-layer, single-chip transmitter. ● If we look on this slide, you can see actual pictures of the evaluation kits for both IDT as well as a leading competitor. And you can see that by having a true single-chip solution, we're able to reduce the application area from 1800 mm 2 to 360 mm2, so there's a big reduction, 80 percent reduction in your board footprint, your solution area. If we look at the number of components, we’ve reduced the number of components from the competitors 91 down to 30 components. So this also helps you reduce area, it helps you reduce cost. And the competitor's solution uses nine different ICs to enable the solution. IDT, again, requires a single-chip. All this results in a total solution BoM cost, this includes coil, transmitter IC, and all these different components. We can cut that system BoM in half. ● Now let's take a look at our wireless power receiver, the IDTP9020. ● The IDTP9020, you can see the block diagram there on the right. So this is again, designed to meet the Qi standard, but we also, again, support proprietary modes to enable power delivery up to 7.5 watts. This higher power means that you can support more power-hungry devices, or you can enable faster charging modes. Again, we focused on efficiency on a receiver side as well, so we have high efficiency synchronous buck to do that final DC to DC conversion. This results in a total efficiency if you use the IDT transmitter and IDT receiver of over 70 percent. We estimate 73 to 75 percent, when you use our solutions together. We also offer the option for integrated USB adapter switches, so for the USB charging path, you can eliminate some external components by using the integrated USB switches within our device. If you use our receiver along with our transmitter, we enable two different, two additional levels of foreign object detection, FOD3 and FOD4. It gives you additional levels of protection for cases where you have a valid receiver on your transmitter, but there's still a piece of stray metal or a parasitic metal that either is there to begin with when you put your device on your transmitter, or in the case where you're already transferring power, but that device gets inserted between the transmitter and the receiver. As with the transmitter, we also have options for security, encryption and two-way communication. ● Again, looking at IDT's solution against leading competitor’s second-generation solution, we offer an embedded micro control. This allows us to offer a lot of the value of features that I mentioned. Again, on the receiver side, we support multiple modes, and with our solution, you can dynamically switch between the modes. So if you program your transmitter and your receiver to recognize the Qi standard as well as two additional proprietary modes, when a device supporting these different modes is applied onto our transmitter, we can recognize what type of protocol is involved, and we can then transfer in that particular protocol. So if you put a Qi device on our transmitter, it will recognize the Qi standard and transmit power using that protocol, as well as other proprietary protocols that are designed into the transmitter. I mentioned about the additional levels of foreign object detection, high-efficiency buck converter, and looking at the second to the last item in the table, we also support integrated current loading functions. So instead of having an external resistor to depend upon your current being limited that way, we offer that function internal to our chip. ● To wrap things up, we offer a huge amount of innovation in this new and exciting area. On the transmitter side, once again, we offer the industry's first true single-chip transmitter, with the ability to support not only the Qi standard, but other proprietary protocols to be able to deliver higher power, 50 percent more power, 7.5 watts, as well as significantly reducing board space, the number of components, and total solution BoM costs. On the receiver side once again, we deliver the option for higher power, up to 7.5 watts, the ability to support multiple modes using a single receiver, as well as the ultrahigh efficiency which gives you 73 to 75 percent efficiency using our Qi devices together. ● Again, you get additional synergies by using our transmitter and receiver together, including the option for a back channel communication, two-way authentication, and 64-bit encryption. So this is just an overview of our devices. We're very excited to be bringing these to the market. ● If you have any questions, or want to see more about our solutions, please visit us at, or our URL Thank you. PAGE 20

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