bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 Low System Cost, Wireless Power Controller for WPC TX A5 or A11 Check for Samples: bq500212A FEATURES DESCRIPTION • The bq500212A is a Qi-certified value solution that integrates all functions required to control wireless power delivery to a single WPC1.1 compliant receiver. It is WPC1.1 compliant and designed for 5-V systems as a wireless power consortium type A5 or A11 transmitter. The bq500212A pings the surrounding environment for WPC compliant devices to be powered, safely engages the device, receives packet communication from the powered device and manages the power transfer according to WPC1.1 specification. To maximize flexibility in wireless power control applications, Dynamic Power Limiting™ (DPL) is featured on the bq500212A. Dynamic Power Limiting™ enhances user experience by seamlessly optimizing the usage of power available from limited input supplies. The bq500212A supports both Foreign Object Detection (FOD) and enhanced Parasitic Metal Object Detection (PMOD) for legacy product by continuously monitoring the efficiency of the established power transfer, protecting from power lost due to metal objects misplaced in the wireless power transfer field. Should any abnormal condition develop during power transfer, the bq500212A handles it and provides indicator outputs. Comprehensive status and fault monitoring features enable a low cost yet robust, Qi-certified wireless power system design. 1 Proven, Qi-Certified Value Solution for Transmit-Side Application Lowest Device Count for Full WPC1.1 5-V Solution 5-V Operation Conforms to Wireless Power Consortium (WPC1.1) Type A5 or A11 Transmitter Specification Fully WPC Compliant, Including Improved Foreign Object Detection (FOD) Method Permits X7R Type Resonant Capacitors for Reduced Cost Dynamic Power Limiting™ for USB and Limited Source Operation Digital Demodulation Reduces Components LED Indication of Charging State and Fault Status Low Standby and High Efficiency 2 • • • • • • • • APPLICATIONS • Wireless Power Consortium (WPC1.1) Compliant Wireless Chargers For: – Qi-Certified Smart Phones and other Handhelds – Car and Other Vehicle Accessories See www.ti.com/wirelesspower for More Information on TI's Wireless Charging Solutions • The bq500212A is available in a 48-pin, 7-mm x 7mm QFN package. System Diagram and Efficiency Versus System Output Power 80 Current Sense 5V VIN 70 LDO bq500212 A Wireless Power Controller PWM ½ Bridge Driver Tank /Coil Assembly Communication ½ Bridge Driver Efficiency (%) LED 60 50 40 30 20 10 0 0 0.5 1 1.5 2 2.5 3 3.5 4 Power (W) 4.5 5 C001 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Dynamic Power Limiting is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2013, Texas Instruments Incorporated bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ORDERING INFORMATION (1) OPERATING TEMPERATURE RANGE, TA ORDERABLE PART NUMBER PIN COUNT SUPPLY PACKAGE TOP SIDE MARKING BQ500212ARGZR 48 pin Reel of 2500 QFN BQ500212A BQ500212ARGZT 48 pin Reel of 250 QFN BQ500212A -40°C to 110°C (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) VALUE MIN MAX Voltage applied at V33D to GND –0.3 3.6 Voltage applied at V33A to GND –0.3 3.6 –0.3 3.6 –40 150 Voltage applied to any pin (2) Storage temperature,TSTG (1) (2) 2 UNIT V °C Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltages referenced to GND. Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range (unless otherwise noted) MIN V Supply voltage during operation, V33D, V33A 3.0 TA Operating free-air temperature range –40 TJ Junction temperature TYP MAX 3.3 UNIT 3.6 110 110 V °C THERMAL INFORMATION bq500212A THERMAL METRIC (1) RGZ UNITS 48 PINS θJA Junction-to-ambient thermal resistance (2) 28.4 θJCtop Junction-to-case (top) thermal resistance (3) 14.2 (4) θJB Junction-to-board thermal resistance ψJT Junction-to-top characterization parameter (5) 0.2 ψJB Junction-to-board characterization parameter (6) 5.3 θJCbot Junction-to-case (bottom) thermal resistance (7) 1.4 (1) (2) (3) (4) (5) (6) (7) 5.4 °C/W For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as specified in JESD51-7, in an environment described in JESD51-2a. The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDECstandard test exists, but a close description can be found in the ANSI SEMI standard G30-88. The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB temperature, as described in JESD51-8. The junction-to-top characterization parameter, ψJT, estimates the junction temperature of a device in a real system and is extracted from the simulation data for obtaining θJA, using a procedure described in JESD51-2a (sections 6 and 7). The junction-to-board characterization parameter, ψJB, estimates the junction temperature of a device in a real system and is extracted from the simulation data for obtaining θJA , using a procedure described in JESD51-2a (sections 6 and 7). The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88. Spacer Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A 3 bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com ELECTRICAL CHARACTERISTICS over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX V33A = 3.3 V 8 15 V33D = 3.3 V 44 55 V33D = V33A = 3.3 V 52 60 3.3 3.6 4 4.6 UNIT SUPPLY CURRENT IV33A IV33D Supply current ITOTAL mA INTERNAL REGULATOR CONTROLLER INPUTS/OUTPUTS V33 3.3-V linear regulator V33FB 3.3-V linear regulator feedback IV33FB Series pass base drive Beta Series NPN pass device Emitter of NPN transistor 3.25 VIN = 12 V; current into V33FB pin 10 V mA 40 EXTERNALLY SUPPLIED 3.3 V POWER V33D Digital 3.3-V power TA = 25°C 3 3.6 V33A Analog 3.3-V power TA = 25°C 3 3.6 V33Slew V33 slew rate V33 slew rate between 2.3 V and 2.9 V, V33A = V33D 0.25 V V/ms DIGITAL DEMODULATION INPUTS COMM_A+, COMM_A-, COMM_B+, COMM_BVbias COMM+ Bias Voltage COMM+, COMM- 1.5 Modulation voltage digital resolution REA Input impedance Ground reference 0.5 IOFFSET Input offset current 1-kΩ source impedance –5 V 1 1.5 mV 3 MΩ 5 µA 0.36 V ANALOG INPUTS V_SENSE, I_SENSE, T_SENSE, LED_MODE, LOSS_THR, SNOOZE_CAP, PWR_UP VADDR_OPEN Voltage indicating open pin LED_MODE open VADDR_SHORT Voltage indicating pin shorted to GND LED_MODE shorted to ground VADC_RANGE Measurement range for voltage monitoring ALL ANALOG INPUTS INL ADC integral nonlinearity RIN Input impedance CIN Input capacitance Ground reference 2.37 0 2.5 -2.5 2.5 8 mV MΩ 10 pF DIGITAL INPUTS/OUTPUTS DGND1 + 0.25 VOL Low-level output voltage IOL = 6 mA , V33D = 3 V VOH High-level output voltage IOH = -6 mA , V33D = 3 V VIH High-level input voltage V33D = 3V VIL Low-level input voltage V33D = 3.5 V IOH(MAX) Output high source current 4 IOL(MAX) Output low sink current 4 V33D - 0.6V 2.1 V 3.6 1.4 mA SYSTEM PERFORMANCE VRESET Voltage where device comes out of reset V33D Pin tRESET Pulse width needed for reset RESET pin fSW Switching Frequency 4 2.4 2 112 Submit Documentation Feedback V µs 205 kHz Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 DEVICE INFORMATION Functional Block Diagram bq500212A LED Control / Low Power Interface COMM_A+ 37 COMM_A- 38 COMM_B+ 39 6 SLEEP 7 LED_A 8 LED_B 9 SNOOZE 15 FOD_CAL 18 LED_C Digital Demodulation 16 PMOD 17 FOD COMM_B- 40 12 PWM-A Controller PWM 13 PWM-B PEAK_DET 1 V_SENSE 46 I_SENSE 42 T_SENSE 2 12-bit ADC 23 BUZ_AC Buzzer Control 24 BUZ_DC LOSS_THR 43 LED_MODE 44 SNOOZE_CAP POR 11 DATA I2C 3 10 CLK 5 RESET UDG-13118 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A 5 bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com COMM_A+ COMM_B- I_SENSE PWR_UP V_SENSE 37 36 GND 48 47 46 45 44 43 42 41 40 39 38 ADCREF COMM_A- COMM_B+ RESERVED LOSS_THR LED_MODE RGZ Package (Top View) GND PEAK_DET 1 T_SENSE 2 35 BPCAP SNOOZE_CAP 3 34 V33A N/C 4 33 V33D RESET 5 32 GND SLEEP 6 31 GND bq500212A RESERVED CLK 10 27 RESERVED DATA 11 26 RESERVED 25 12 13 14 15 16 17 18 19 20 21 22 23 24 RESERVED PWM_B PWM_A 6 Submit Documentation Feedback BUZ_DC 28 BUZ_AC 9 SNOOZE_CHG SNOOZE DOUT_TX RESERVED RESERVED 29 RESERVED 8 LED_C LED_B FOD RESERVED PMOD 30 FOD_CAL 7 RESERVED LED_A Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 PIN FUNCTIONS PIN NO. 1 2 3 4 NAME I/O DESCRIPTION PEAK_DET I Connected to peak detect circuit. Protects from coil overvoltage event. T_SENSE I Sensor Input. Device shuts down when below 1 V for longer than 150ms. If not used, keep above 1 V by connecting to the 3.3-V supply. SNOOZE_CAP I Connected to interval timing capacitor N/C I Not used. Can be left open. Can also be tied to GND and flooded with copper to improve GND plane. 5 RESET I Device reset. Use a 10-kΩ to 100-kΩ pull-up resistor to the 3.3-V supply. 6 SLEEP O Connected to 5 s interval circuit 7 LED_A I Connect to an LED via 470-Ω resistor for status indication. 8 LED_B I Connect to an LED via 470-Ω resistor for status indication. 9 SNOOZE O Connected to 500ms ping interval circuit 10 CLK I/O 10-kΩ pull-up resistor to 3.3-V supply. For factory use only. 11 DATA I/O 10-kΩ pull-up resistor to 3.3-V supply. For factory use only. PWM_A O PWM Output A, controls one half of the full bridge in a phase-shifted full bridge. Switching deadtimes must be externally generated. PWM_B O PWM Output B, controls other half of the full bridge in a phase-shifted full bridge. Switching deadtimes must be externally generated. 14 RESERVED O Reserved. Leave open. 15 FOD_CAL O FOD Calibration pin. It controls the FOD calibration setting at startup. PMOD O Set the threshold used to detect a PMOD condition by connecting, via resistor, to pin 43. Leave open to disable PMOD. FOD O Set the threshold used to detect an FOD condition by connecting, via resistor, to pin 43. Leave open to disable FOD. 18 LED_C O Connect to an LED via 470-Ω resistor for status indication. 19 RESERVED O Reserved, leave this pin open. 20 RESERVED I Reserved, connect to GND. 21 DOUT_TX I Not used. Leave this pin open. 22 SNOOZE_CHG I Connected to interval timing capacitor. 23 BUZ_AC O AC Buzzer Output. Outputs a 400-ms, 4-kHz AC pulse when charging begins. BUZ_DC O DC Buzzer Output. Outputs a 400-ms DC pulse when charging begins. This could also be connected to an LED via 470-Ω resistor. 25 RESERVED I/O Not used, leave this pin open. 26 RESERVED I/O Not used, leave this pin open. 27 RESERVED I/O Reserved, leave this pin open. 28 RESERVED I/O Reserved, leave this pin open. 29 RESERVED I/O Reserved, leave this pin open. 30 RESERVED I/O Reserved, leave this pin open. 31 GND I/O Reserved, connect to GND. 12 13 16 17 24 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A 7 bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com PIN FUNCTIONS (continued) PIN NO. 32 33 34 GND V33D V33A I/O DESCRIPTION — GND. — Digital core 3.3-V supply. Be sure to decouple with bypass capacitors as close to the part as possible. — Analog 3.3-V Supply. This pin can be derived from V33D supply, decouple with 10-Ω resistor and additional bypass capacitors 35 BPCAP — Bypass capacitor for internal 1.8-V core regulator. Connect bypass capacitor to GND. 36 GND — GND. 37 COMM_A+ I Digital demodulation non-inverting input A, connect parallel to input B+. 38 COMM_A- I Digital demodulation inverting input A, connect parallel to input B-. 39 COMM_B+ I Digital demodulation non-inverting input B, connect parallel to input A+. 40 COMM_B- I Digital demodulation inverting input B, connect parallel to input A-. 41 RESERVED O Reserved, leave this pin open. I Transmitter input current, used for efficiency calculations. Use 20-mΩ sense resistor and A=50 gain current sense amplifier. 42 I_SENSE 43 LOSS_THR I Input to program FOD/PMOD thresholds and FOD_CAL correction. 44 LED_MODE I Input to select from four LED modes. 45 PWR_UP I Connected to external test circuit or LED drive circuit. I Transmitter input voltage, used for efficiency calculations. Use 76.8-kΩ to 10-kΩ divider to minimize quiescent current. 46 8 NAME V_SENSE 47 GND 48 ADCREF 49 EPAD — I — GND. External Reference Voltage Input. Connect this input to GND. Flood with copper GND plane and stitch vias to PCB internal GND plane. Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 Principles of Operation Fundamentals The principle of wireless power transfer is simply an open cored transformer consisting of primary and secondary coils and associated electronics. The primary coil and electronics are also referred to as the transmitter, and the secondary side the receiver. The transmitter coil and electronics are typically built into a charger pad. The receiver coil and electronics are typically built into a portable device, such as a cell-phone. When the receiver coil is positioned on the transmitter coil, magnetic coupling occurs when the transmitter coil is driven. The flux is coupled into the secondary coil which induces a voltage, current flows, it is rectified and power can be transferred quite effectively to a load - wirelessly. Power transfer can be managed via any of various familiar closed-loop control schemes. Wireless Power Consortium (WPC) The Wireless Power Consortium (WPC) is an international group of companies from diverse industries. The WPC standard was developed to facilitate cross compatibility of compliant transmitters and receivers. The standard defines the physical parameters and the communication protocol to be used in wireless power. For more information, go to www.wirelesspowerconsortium.com. Power Transfer Power transfer depends on coil coupling. Coupling is dependant on the distance between coils, alignment, coil dimensions, coil materials, number of turns, magnetic shielding, impedance matching, frequency and duty cycle. Most importantly, the receiver and transmitter coils must be aligned for best coupling and efficient power transfer. The closer the space between the coils, the better the coupling, but the practical distance is set to be less than 5 mm (as defined within the WPC Specification) to account for housing and interface surfaces. Shielding is added as a backing to both the transmitter and receiver coils to direct the magnetic field to the coupled zone. Magnetic fields outside the coupled zone do not transfer power. Thus, shielding also serves to contain the fields to avoid coupling to other adjacent system components. Regulation can be achieved by controlling any one of the coil coupling parameters. For WPC compatibility, the transmitter coils and capacitance are specified and the resonant frequency point is fixed at 100 kHz. Power transfer is regulated by changing the operating frequency between 110 kHz to 205 kHz. The higher the frequency, the further from resonance and the lower the power. Duty cycle remains constant at 50% throughout the power band and is reduced only once 205 kHz is reached. The WPC standard describes the dimension and materials of the coils. It also has information on tuning the coils to resonance. The value of the inductor and resonant capacitor are critical to proper operation and system efficiency. Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A 9 bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com Communication Communication within the WPC is from the receiver to the transmitter, where the receiver tells the transmitter to send power and how much. In order to regulate, the receiver must communicate with the transmitter whether to increase or decrease frequency. The receiver monitors the rectifier output and using Amplitude Modulation (AM), sends packets of information to the transmitter. A packet is comprised of a preamble, a header, the actual message and a checksum, as defined by the WPC standard. The receiver sends a packet by modulating an impedance network. This AM signal reflects back as a change in the voltage amplitude on the transmitter coil. The signal is demodulated and decoded by the transmitter side electronics and the frequency of its coil drive output is adjusted to close the regulation loop. The bq500212A features internal digital demodulation circuitry. The modulated impedance network on the receiver can either be resistive or capacitive. Figure 1 shows the resistive modulation approach, where a resistor is periodically added to the load and also shows the resulting change in resonant curve which causes the amplitude change in the transmitter voltage indicated by the two operating points at the same frequency. Figure 2 shows the capacitive modulation approach, where a capacitor is periodically added to the load and also shows the resulting amplitude change in the transmitter voltage. Rectifier Receiver Coil Receiver Capacitor Amax Modulation Resitor Operating state at logic “0” A(0) Operating state at logic “1” A(1) Comm Fsw a) F, kHz b) Figure 1. Receiver Resistive Modulation Circuit Rectifier Receiver Coil Receiver Capacitor Modulation Capacitors Amax Comm A(0) Operating state at logic “ 0” A(1) Operating state at logic “ 1” Fsw F, kHz Fo(1) < Fo(0) a) b) Figure 2. Receiver Capacitive Modulation Circuit 10 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 Application Information Coils and Matching Capacitors The coil and matching capacitor selection for the transmitter has been established by WPC standard. These values are fixed and cannot be changed on the transmitter side. An up to date list of available and compatible A5 or A11 transmitter coils can be found here (Texas Instruments Literature Number SLUA649): Capacitor selection is critical to proper system operation. A total capacitance value of 400 nF is required in the resonant tank. A 400-nF capacitor is not a standard value and therefore several must be combined in parallel. It is recommended to use 4 x 100nF, as these are very commonly available. NOTE A total capacitance value of 400 nF/50 V is required in the resonant tank to achieve a 100kHz resonance frequency. To achieve the 400nF total capacitance in the resonant tank, the bq500212A sensitive demodulation circuitry allows the use of three (3) lower cost 100nF/X7R type capacitors in parallel with one (1) high quality 100nF/C0G type, thereby reducing system cost from competitive solutions requiring four C0G types. The capacitors chosen must be rated for 50 V operation. Use quality capacitors from reputable vendors such as KEMET, MURATA or TDK. Dynamic Power Limiting™ Dynamic Power Limiting™ (DPL) allows operation from a 5-V supply with limited current capability (such as a USB port). When the input voltage is observed drooping, the output power is dynamically limited to reduce the load and provides margin relative to the supply’s capability. Anytime the DPL control loop is regulating the operating point of the transmitter, the LED will indicate that DPL is active. The LED color and flashing pattern are determined by the LED Table. If the receiver sends a Control Error Packet (CEP) with a negative value, (for example, to reduce power to the load), the WPTX in DPL mode will respond to this CEP via the normal WPC control loop. NOTE The power limit indication depends on the LED_MODE selected. Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A 11 bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com Option Select Pins Several pins on the bq500212A are allocated to programming the FOD and PMOD Loss Threshold and the LED mode of the device. At power up, a bias current is applied to pins LED_MODE and LOSS_THR and the resulting voltage measured in order to identify the value of the attached programming resistor. The values of the operating parameters set by these pins are determined using Table 2. For LED_MODE, the selected bin determines the LED behavior based on Table 1; for the LOSS_THR, the selected bin sets a threshold used for parasitic metal object detection (see Parasitic Metal Detection (PMOD) and Foreign Object Detection (FOD) section). Table 1. bq500212A LED_MODE 44 Resistors to set options LOSS_THR To 12-bit ADC 43 FOD PMOD FOD_CAL 17 16 15 UDG-13119 Figure 3. Option Select Pin Programming LED Indication Modes The bq500212A can directly drive up to three (3) LED outputs (pin 7, pin 8 and pin 18) through a simple current limit resistor (typically 470 Ω), based on the mode selected. The current limit resistors can be individually adjusted to tune or match the brightness of the LEDs. Do not exceed the maximum output current rating of the device. The resistor in Figure 3 connected to pin 44 and GND selects the desired LED indication scheme in Table 1. • LED modes permit the use of one to three indicator LED's. Amber in the 2-LED mode is obtained by turning on both the green and red. • LEDs can be turned on solid or configured to blink either slow (approx. 1.6s period) or fast (approx. 400ms period). • Except in modes 2 and 9, the charge complete state is only maintained for 5 seconds after which it reverts to idle. This permits the processor to sleep in order to reduce standby power consumption. In other modes, external logic, such as a flip-flop, may be implemented to maintain the charge complete indication if desired. 12 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 Table 1. LED Modes OPERATIONAL STATES LED CONTROL OPTION LED SELECTION RESISTOR X < 36.5 kΩ DESCRIPTION STANDBY POWER TRANSFER CHARGE COMPLETE FAULT DYNAMIC POWER LIMITING™ FOD Warning - - - - - - LED1, green Off Blink slow On Off Blink slow Off LED2, red Off Off Off On Blink slow Blink fast LED LED1, green Reserved, do not use LED2, red LED3, amber 1 2 3 4 5 6 7 8 9 10 42.2 kΩ 48.7 kΩ 56.2 kΩ 64.9 kΩ 75 kΩ 86.6 kΩ 100 kΩ 115 kΩ 133 kΩ 154 kΩ Choice number 1 Choice number 2 Choice number 3 Choice number 4 Choice number 5 Choice number 6 Choice number 7 Choice number 8 Choice number 9 Choice number 10 LED3, amber - - - - - - LED1, green On Blink slow On Off Blink slow Off Blink fast LED2, red On Off Off On Blink slow LED3, amber - - - - - - LED1, green Off On Off Blink fast On On - LED2, red - - - - - LED3, amber - - - - - - LED1, green Off On Off Off Off Off Blink fast LED2, red Off Off Off On Blink slow LED3, amber - - - - - - LED1, green Off Off On Off Off Off LED2, red Off On Off Off On On LED3, amber Off Off Off Blink slow Off Off LED1, green Off Blink slow On Off Off Off LED2, red Off Off Off On Off Blink fast LED3, amber Off Off Off Off Blink Slow Off LED1, green Off Blink slow Off Off Off Off LED2, red Off Off On Off Off Off LED3, amber Off Off Off On Blink slow Blink fast LED1, green Off Off On Blink slow Off Off LED2, red Off On Off Blink slow On On LED3, amber - - - - - - LED1, green Off Blink slow On Off Blink slow Off Blink fast LED2, red Off Off Off On Blink slow LED3, amber - - - - - - LED1, green Off On Off Blink fast Blink slow On LED2, red Off Off On Off Off Off LED3, amber - - - - - - Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A 13 bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com Parasitic Metal Object Detect (PMOD), Foreign Object Detection (FOD) and FOD Calibration The bq500212A supports improved FOD (WPC1.1) and enhanced PMOD (WPC 1.0) features. Continuously monitoring input power, known losses, and the value of power reported by the RX device being charged, the bq500212A can estimate how much power is unaccounted for and presumed lost due to metal objects placed in the wireless power transfer path. If this unexpected loss exceeds the threshold set by the FOD or PMOD resistors, a fault is indicated and power transfer is halted. Whether the FOD or the PMOD algorithm is used is determined by the ID packet of the receiver being charged. As the default, both PMOD and FOD resistors should set a threshold of 400 mW (selected by 56.2-kΩ resistors from FOD (pin 17) and PMOD(pin16) to LOSS_THR (pin43)). 400 mW has been empirically determined using standard WPC FOD test objects (disc, ring and foil). Some tuning might be required as every system will be slightly different. This tuning is best done by trial and error, use the set resistor values given in the table to increase or decrease the loss threshold and retry the system with the standard test objects. The ultimate goal of the FOD feature is safety; to protect misplaced metal objects from becoming hot. Reducing the loss threshold and making the system too sensitive will lead to false trips and a bad user experience. Find the balance which best suits the application. If the application requires disabling one function or the other (or both), it is possible by leaving the respective FOD/PMOD pin open. For example, to selectively disable the PMOD function, PMOD (pin16) should be left open. NOTE Disabling FOD results in a TX solution that is not WPC compliant. Resistors of 1% tolerance should be used for a reliable selection of the desired threshold. The FOD and PMOD resistors (pin17 and pin16) program the permitted power loss for the FOD and PMOD algorithms respectively. The FOD_CAL resistor (pin15), can be used to compensate for any load dependent effect on the power loss. Using a calibrated test receiver with no foreign objects present, the FOD_CAL resistor should be selected such that the calculated loss across the load range is substantially constant (within ~100 mW). After correcting for the load dependence, the FOD and PMOD thresholds should be re-set above the resulting average by approximately 400 mW in order for the transmitter to satisfy the WPC requirements on tolerated heating. Please contact TI for more information about setting appropriate FOD, PMOD, and FOD_CAL resistor values for your design. Table 2. Option Select Bins 14 BIN NUMBER RESISTANCE (kΩ) LOSS THRESHOLD (mW) 0 <36.5 250 1 42.2 300 2 48.7 350 3 56.2 400 4 64.9 450 5 75.0 500 6 86.6 550 7 100 600 8 115 650 9 133 700 10 154 750 11 178 800 12 205 850 13 >237 Feature Disabled Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 Shut Down via External Thermal Sensor or Trigger Typical applications of the bq500212A will not require additional thermal protection. This shutdown feature is provided for enhanced applications and is not only limited to thermal shutdown. The key parameter is the 1.0 V threshold on pin 2. Voltage below 1.0 V on pin 2 for longer than 150ms causes the device to shutdown. The application of thermal monitoring via a Negative Temperature Coefficient (NTC) sensor, for example, is straightforward. The NTC forms the lower leg of a temperature dependant voltage divider. The NTC leads are connected to the bq500212A device, pin 2 and GND. The threshold on pin 2 is set to 1.0 V, below which the system shuts down and a fault is indicated (depending on LED mode chosen). To implement this feature follow these steps: 1) Consult the NTC datasheet and find the resistence vs temperature curve. 2) Determine the actual temperature where the NTC will be placed by using a thermal probe. 3) Read the NTC resistance at that temperature in the NTC datasheet, that is R_NTC. 4) Use the following formula to determine the upper leg resistor (R_Setpoint): R _ Setpoint = 2.3 ´ R _ NTC (1) The system will restore normal operation after approximately five minutes or if the receiver is removed. If the feature is not used, this pin must be pulled high. NOTE Pin 2 must always be terminated, else erratic behavior may result. 3V3_VCC Optional Temperature Sensor R_Setpoint T_SENSE NTC 2 AGND AGND Figure 4. Negative Temperature Coefficient (NTC) Application Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A 15 bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com Fault Handling and Indication The following table provides approximate durations for the time before a retry is attempted for End Power Transfer (EPT) packets and fault events. Precise timing may be affected by external components, or shortened by receiver removal. The LED mode selected determines how the LED indicates the condition or fault. CONDITION DURATION (before retry) EPT-00 Immediate Unknown EPT-01 5 seconds Charge complete HANDLING EPT-02 Infinite Internal fault EPT-03 5 minutes Over temperature EPT-04 Immediate Over voltage EPT-05 Immediate Over current EPT-06 Infinite Battery failure EPT-07 Not applicable Reconfiguration EPT-08 Immediate No response OC (over current) 1 minute NTC (external sensor) 5 minutes PMOD/FOD warning 12 seconds PMOD/FOD 5 minutes 10 seconds LED only, 2 seconds LED + buzzer Power Transfer Start Signal The bq500212A features two signal outputs to indicate that power transfer has begun. Pin 23 outputs a 400-ms duration, 4-kHz square wave for driving low cost AC type ceramic buzzers. Pin 24 outputs logic high, also for 400 ms, which is suitable for DC type buzzers with built-in tone generators, or as a trigger for any type of customized indication scheme. If not used, these pins can be left open. Power-On Reset The bq500212A has an integrated Power-On Reset (POR) circuit which monitors the supply voltage and handles the correct device startup sequence. Additional supply voltage supervisor or reset circuits are not needed. External Reset, RESET Pin The bq500212A can be forced into a reset state by an external circuit connected to the RESET pin. A logic low voltage on this pin holds the device in reset. For normal operation, this pin is pulled up to 3.3 VCC with a 10-kΩ pull-up resistor. Low Power Mode During standby, when nothing is on the transmitter pad, the bq500212A pings the surrounding environment at fixed intervals. The ping interval can be adjusted; the component values selected for the SNOOZE circuit determine this interval between pings. The choice of the ping interval effects two quantities: the idle efficiency of the system, and the time required to detect the presence of a receiver when it is placed on the pad. A trade off should be made which balances low power (longest ping interval) with good user experience (quick detection through short ping interval) while still meeting the WPC requirement for detection within 0.5 seconds. The system power consumption is approximately 300 mW during an active ping, which lasts approximately 90 ms, and 40 mW for the balance of the cycle. A weighted average can thus be used to estimate the overall system’s idle consumption: If T_ping is the interval between pings in ms, P_idle in mW is approximately: (40 x (T_ping – 90) + 300 x 90)/T_ping 16 (2) Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 Trickle Charge and CS100 The WPC specification provides an End-of-Power Transfer message (EPT–01) to indicate charge complete. Upon receipt of the charge complete message, the bq500212A will change the LED indication. The exact indication depends on the LED_MODE chosen. In some battery charging applications there is a benefit to continue the charging process in trickle-charge mode to top off the battery. There are several information packets in the WPC specification related to the levels of battery charge (Charge Status). The bq500212A uses these commands to enable top-off charging. The bq500212A changes the LED indication to reflect charge complete when a Charge Status message is 100% received, but unlike the response to an EPT, it will not halt power transfer while the LED is solid green. The mobile device can use a CS100 packet to enable trickle charge mode. If the reported charge status drops below 90% normal, charging indication will be resumed. Current Monitoring Requirements The bq500212A is WPC1.1 ready. In order to enable the FOD or PMOD features, current monitoring circuitry must be provided in the application design. For proper scaling of the current monitor signal, the current sense resistor should be 20 mΩ and the current shunt amplifier should have a gain of 50, such as the INA199A1. For FOD accuracy, the current sense resistor must be a quality component with 1% tolerance, at least 1/4-Watt rating, and a temperature stability of ±200 PPM. Proper current sensing techniques in the application hardware should also be observed. If WPC compliance is not required current monitoring can be omitted. Connect the I_SENSE pin (pin 42) to GND. All Unused Pins All unused pins can be left open unless otherwise indicated. Pin 4 can be tied to GND and flooded with copper to improve ground shielding. Please refer to the pin definition table for further explanations. Design Checklist for WPC1.1 Compliance with the bq500212A • • • • Coil and capacitor selection matches the A5/A11 specification. Total 400-nF resonant capacitor requirement is composed of: (3 x 100nF/X7R) + (1 x 100nF/C0G) types. Precision current sense amp used, such as the INA199A1. This is required for accurate FOD operation. Current shunt resistor 1% and <200 PPM. This is required for accurate FOD operation. Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A 17 Submit Documentation Feedback Product Folder Links: bq500212A D4 R12 NoPop COMM+ N/C C11 D5-A A K NoPop K A D5-B R16 475 R8 10k 15.4k R10 C24 4.7nF K A D9-A R50 475 LED_B LED_A VIN JP1 D7 10uF 10K R5 C4 1 523k RESET 37 COMM_A+ 38 COMM_A39 COMM_B+ 40 COMM_B- 18 LED_C 21 UNUSED 22 SNOOZE_CHG 46 V_SENSE 45 PWR_UP 42 I_SENSE 6 7 SLEEP 8 LED_A LED_B 9 SNOOZE 4 3 AIN8 2 SNOOZE_CAP 1 T_SENSE PEAK_DET 5 41 RESERVED 48 ADCREF AGND Q4 R6 22 R18 10.0k 3 EN 1.0uF C3 JP3 56.2k R2 LED_MODE44 43 LOSS_THR UNUSED 26 UNUSED 25 BUZ_DC 24 BUZ_AC 23 12 PWM_A PMB_B 13 LOAD_FET 14 UNUSED 15 FOD 16 PMOD 17 U1 BQ500212A RESERVED20 RESERVED19 DATA 11 10 CLK BPCAP 35 ~RESERVED31 RESERVED30 RESERVED29 RESERVED28 RESERVED27 4.7uF C5 3V3_ADC C10 R23 56.2k TP25 TP26 TP23 TP24 TP12 JP2 R24 NoPop TMS TDI R43 TDO TCK 10.0k R27 NoPop TP1 R47 10.0 R3 10.0 10.0k 10.0k R40 R41 C27 0.01uF 3V3_VCC R26 1.00 3V3_VCC C78 0.1uF /TRST 3V3_VCC R71 1.00k REF GND V+ C69 0.1uF R20 1.00 R69 0.020 VIN U17 INA199A1 I_SENSE C9 4.7uF 1.0uF C20 2.2uF SNOOZE NC 4 OUT 5 U5 TLV71333 2 GND 1 IN SNOOZE_CAP TP10 523k R30 C22 BSS138 2.2uF Parts with no values are not installed COMM+ COMM- SNOOZE_CHG LED_C TP18 SLEEP LED_A LED_B SNOOZE PWR_UP I_SENSE 4.7uF C1 1.0uF C19 R25 1.0MEG R28 3V3_VCC 4.7uF C12 C32X 10uF SNOOZE_CAP R19 10.0k D6 BAT54SW 5.1MEG R53 C32 BAT54SW R52 10.0k Q7 BSS138 4700pF LED_C 2.00k R11 475 R33 SLEEP Temp Sensor SNOOZE_CHG GND AGND C6 4.7uF 10V GND-TIE IN R15 475 AGND 5 Vin V33A 34 DC Jack or USB C13 4.7uF V33D 33 47 GND 36 GND 32 GND 49 PAD 18 IN+ OUT IN- VIN DPWM-1A DATA CLK DPWM-1B R48 3.6k TP17 AGND R4 3.6k TP16 5 VIN VDD 2 COMM- COMM+ VSW 4 PGND 3 GND PGND 9 6 BOOT_R C29 7 BOOT 3V3_VCC GND C21 10uF 25V 50V 0.1uF SKIP# 1 U2 CSD97376CQ4M 8 PWM DPWM-1A R13 10R R29 10R C2 1.0uF 16V GND VIN C14 33pF 50V R14 12.1K 3V3 C17 100nF C15 100nF C7 100nF C16 100nF AGND AGND R9 10K R1 100K C18 4.7nF 50V COIL AGND D1 BAT54SW GND C23 1.0uF 16V VIN 4 VSW BOOT 7 PGND 9 VIN 5 BOOT_R 6 GND 3 PGND 2 VDD PWM 8 C28 GND C31 10uF 25V 50V 0.1uF DPWM-1B U3 CSD97376CQ4M 1 SKIP# bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com APPLICATION INFORMATION Overview The application schematic for the transmitter with reduced standby power is shown in Figure 5. CAUTION Please check the bq500212A product page for the most up-to-date application schematic and list of materials package before starting a new design. Figure 5. bq500121A Schematic Copyright © 2013, Texas Instruments Incorporated bq500212A www.ti.com SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 Input Regulator The bq500212A requires 3.3 VDC to operate. A buck regulator or a linear regulator can be used to step down from the 5-V system input. Either choice is fully WPC compatible, the decision lies in the user's requirements with respect to cost or efficiency. For lowest cost the TLV70033 linear regulator is recommended. Power Train The bq500212A drives a phase-shifted full bridge. This is essentially twin half bridges and the choice of driver devices is quite simple; a pair of CSD97376 Integrated Power Stages are used. Other combinations using discrete driver and MOSFETs can work and system performance with regards to efficiency and EMI emissions will vary. Any alternate MOSFETs chosen must be fully saturated at the 5-V system gate drive voltage available and be sure to pay attention whether or not to use gate resistors; some tuning might be required. PCB Layout A good PCB layout is critical to proper system operation and due care should be taken. There are many references on proper PCB layout techniques. Generally speaking, the system layout will require a 4-layer PCB layout, although a 2-layer PCB layout can be achieved. A proven and recommended approach to the layer stack-up has been: • Layer 1, component placement and as much ground plane as possible. • Layer 2, clean ground. • Layer 3, finish routing. • Layer 4, clean ground. Thus, the circuitry is virtually sandwiched between grounds. This minimizes EMI noise emissions and also provides a noise free voltage reference plane for device operation. Keep as much copper as possible. Make sure the bq500212A GND pins and the power pad have a continuous flood connection to the ground plane. The power pad should also be stitched to the ground plane, which also acts as a heat sink for the bq500212A. A good GND reference is necessary for proper bq500212A operation, such as analog-digital conversion, clock stability and best overall EMI performance. Separate the analog ground plane from the power ground plane and use only one tie point to connect grounds. Having several tie points defeats the purpose of separating the grounds. The COMM return signal from the resonant tank should be routed as a differential pair. This is intended to reduce stray noise induction. The frequencies of concern warrant low-noise analog signaling techniques, such as differential routing and shielding, but the COMM signal lines do not need to be impedance matched. Typically a single chip controller solution with integrated power FET and synchronous rectifier will be used. To create a tight loop, pull in the buck inductor and power loop as close as possible. Likewise, the power-train, fullbridge components should be pulled together as tight as possible. See the bq500212AEVM-550, bqTESLA Wireless Power TX EVM User's Guide (Texas Instruments Literature Number SLVU536) for layout examples. Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A 19 bq500212A SLUSBD6B – JULY 2013 – REVISED NOVEMBER 2013 www.ti.com References 1. Building a Wireless Power Transmitter, Application Report, (Texas Instruments Literature Number, SLUA635) 2. Technology, Wireless Power Consortium, www.wirelesspowerconsortium.com 3. An Introduction to the Wireless Power Consortium Standard and TI’s Compliant Solutions, (Johns Bill, Texas Instruments) 4. Integrated Wireless Power Supply Receiver, Qi (Wireless Power Consortium), BQ51013 Datasheet, (Texas Instruments Literature Number, SLUSAY6) REVISION HISTORY Changes from Original (July) to Revision A • Page Changed marketing status from Product Preview to Production Data. ................................................................................ 1 Changes from Revision A (August, 2013) to Revision B • 20 Page Changed WPC1 to WPC1.1 throughout the document. ....................................................................................................... 1 Submit Documentation Feedback Copyright © 2013, Texas Instruments Incorporated Product Folder Links: bq500212A PACKAGE OPTION ADDENDUM www.ti.com 4-Nov-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) BQ500212ARGZR ACTIVE VQFN RGZ 48 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 110 BQ500212A BQ500212ARGZT ACTIVE VQFN RGZ 48 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 110 BQ500212A (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 4-Nov-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 4-Nov-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant BQ500212ARGZR VQFN RGZ 48 2500 330.0 16.4 7.3 7.3 1.5 12.0 16.0 Q2 BQ500212ARGZT VQFN RGZ 48 250 180.0 16.4 7.3 7.3 1.5 12.0 16.0 Q2 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 4-Nov-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ500212ARGZR VQFN RGZ 48 2500 367.0 367.0 38.0 BQ500212ARGZT VQFN RGZ 48 250 210.0 185.0 35.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use of any TI components in safety-critical applications. In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and requirements. Nonetheless, such components are subject to these terms. No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties have executed a special agreement specifically governing such use. Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of non-designated products, TI will not be responsible for any failure to meet ISO/TS16949. Products Applications Audio www.ti.com/audio Automotive and Transportation www.ti.com/automotive Amplifiers amplifier.ti.com Communications and Telecom www.ti.com/communications Data Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computers DLP® Products www.dlp.com Consumer Electronics www.ti.com/consumer-apps DSP dsp.ti.com Energy and Lighting www.ti.com/energy Clocks and Timers www.ti.com/clocks Industrial www.ti.com/industrial Interface interface.ti.com Medical www.ti.com/medical Logic logic.ti.com Security www.ti.com/security Power Mgmt power.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video RFID www.ti-rfid.com OMAP Applications Processors www.ti.com/omap TI E2E Community e2e.ti.com Wireless Connectivity www.ti.com/wirelessconnectivity Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2013, Texas Instruments Incorporated