Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - power management - special purpose 52 mA VQFN 48 (7x7)

0 1 2 3 4 5

Output Power (W)

Efficiency (%)

G000

Power

Stage

AC-DC

BQ500410 A

Feedback

Transmitter Receiver

Rectification

Voltage

Conditioning

Load

Controller

bq51k

Communication

Power

bq500410A

www.ti.com

SLUSB96 – NOVEMBER 2012

Free Positioning, Qi Compliant Wireless Power Transmitter Manager

Check for Samples: bq500410A

FEATURES

DESCRIPTION

The bq500410A is a free-positioning digital wireless

• Expanded Free Positioning Using Three Coil

power controller that integrates all functions required

Transmit Array

to control wireless power transfer to a WPC compliant

• Intelligent Control of Wireless Power Transfer

receiver. It is WPC 1.1 ready and designed for 12-V

• Conforms to Wireless Power Consortium

systems but applicable to other supply voltages. The

bq500410A pings the surrounding environment for

(WPC) A6 Transmitter Specification

WPC compliant devices to be powered, safely

• Digital Demodulation Reduces Components

engages the device, reads the packet feedback from

• WPC1.1 Ready, Including Foreign Object

the powered device, and manages the power

Detection (FOD)

transfer. A charging area of at least 70 mm x 20 mm

provides flexible receiver placement on a transmitter

• Enhanced Parasitic Metal Detection (PMOD)

pad. The bq500410A supports both Parasitic Metal

Assures Safety

Detection (PMOD) and Foreign Object Detection

• Over-Current Protection

(FOD) by continuously monitoring the efficiency of the

• LED Indication of Charging State and Fault

established power transfer, protecting from power lost

Status

due to metal objects misplaced in the wireless power

transfer path. Should any abnormal condition develop

during power transfer, the bq500410A handles it and

APPLICATIONS

provides fault indicator outputs. Comprehensive

• WPC 1.1 Ready Wireless Chargers for:

protection features provide a robust design to protect

– Smart Phones and other Handhelds

the system in all receiver placements.

– Hermetically Sealed Devices and Tools

The bq500410A is available in an area saving 48-pin,

– Cars and Other Vehicles

7 mm x 7 mm QFN package and operates over a

temperature range from –40°C to 110°C.

– Tabletop Charge Surfaces

• See www.ti.com/wirelesspower for More

Information on TI's Wireless Charging

Solutions

Functional Diagram and Efficiency Versus System Output Current

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.

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.

Summary of content (30 pages)

PAGE 1
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 Free Positioning, Qi Compliant Wireless Power Transmitter Manager Check for Samples: bq500410A FEATURES DESCRIPTION • The bq500410A is a free-positioning digital wireless power controller that integrates all functions required to control wireless power transfer to a WPC compliant receiver. It is WPC 1.1 ready and designed for 12-V systems but applicable to other supply voltages.
PAGE 2
bq500410A SLUSB96 – NOVEMBER 2012 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.
PAGE 3
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range (unless otherwise noted) MIN NOM 3.3 V Supply voltage during operation, V33D, V33A 3.0 TA Operating free-air temperature range –40 TJ Junction temperature MAX UNIT 3.6 V 110 °C 110 THERMAL INFORMATION bq500410A THERMAL METRIC (1) RGZ UNITS 48 PINS θJA Junction-to-ambient thermal resistance (2) 27.1 θJCtop Junction-to-case (top) thermal resistance (3) 12.
PAGE 4
bq500410A SLUSB96 – NOVEMBER 2012 www.ti.com ELECTRICAL CHARACTERISTICS over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN NOM MAX V33A = 3.3 V 8 15 V33D = 3.3 V 42 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.
PAGE 5
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 DEVICE INFORMATION Functional Block Diagram bq500410A LED Control / Low Power Supervisor Interface COMM _A+ 37 COMM_A- 38 COMM _B+ 39 7 MSP_RST/LED1 8 MSP_MISO/LED2 9 MSP_TEST 14 MSP_SYNC 18 MSP_CLK Digital Demodulation 25 MSP_MOSI/LPWR_EN 26 MSP_RDY COMM_B- 40 12 DPWM_A FOD 6 Controller PMOD 13 PWM/ Coil_Select V_IN 46 15 Coil 1.1 16 Coil 1.2 17 Coil 1.
PAGE 6
bq500410A SLUSB96 – NOVEMBER 2012 www.ti.
PAGE 7
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 Table 1. bq500410A Pin Description PIN NO. NAME 1 COIL_PEAK 2 T_SENSE 3 AD03 4 5 6 FOD 7 MSP_RST/LED1 8 I/O DESCRIPTION I Input from peak detect circuit I Sensor input. Device shuts down when below 1 V. If not used, keep above 1 V by simply connecting to 3.3-V supply I This pin can be either connected to GND or left open. Connecting to GND can improve layout grounding AD08 I Reserved. Connect to 3.3-V supply RESET I Device reset.
PAGE 8
bq500410A SLUSB96 – NOVEMBER 2012 www.ti.com Table 1. bq500410A Pin Description (continued) PIN NO. 8 NAME I/O DESCRIPTION 32 GND — GND 33 V33D — Digital Core 3.3-V supply. Be sure to decouple with bypass capacitors as close to the part as possible. 34 V33A — Analog 3.3-V supply. This pin can be derived from V33D supply, decouple with 22-Ω resistor and additional bypass capacitors 35 BPCAP — Bypass capacitor for internal 1.8-V core regulator.
PAGE 9
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 Principles of Operation Fundamentals The principle of wireless power transfer is simply an open cored transformer consisting of a transmitter and receiver coils. The transmitter coil and electronics are typically built into a charger pad and 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 once the transmitter coil is driven.
PAGE 10
bq500410A SLUSB96 – NOVEMBER 2012 www.ti.com Principles of Operation (continued) 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.
PAGE 11
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 The bq500410A Description of Operation The bq500410A pings the surroundings in 400-ms intervals by sequentially firing the three coils in the array. The COMM feedback signal is multiplexed through analog switches and is synchronized to the coil being driven. To select the best coil match, the bq500410A looks for the strongest COMM signal. The coil is engaged and driven, note that only one coil is driven at a time.
PAGE 12
bq500410A SLUSB96 – NOVEMBER 2012 www.ti.com A6 Coil Specification The coil and matching capacitor specification for the A6 transmitter has been established by WPC Standard. This is fixed and cannot be changed on the transmitter side. The bq500410A is primarily intended to drive a 3 coil array but it can also be used to drive a single coil. For single coil operation the two outer coils and associated electronics are simply omitted.
PAGE 13
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 Option Select Pins Two pins (pin 43 and pin 44) on the bq500410A are allocated to program the 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 4.
PAGE 14
bq500410A SLUSB96 – NOVEMBER 2012 www.ti.com Parasitic Metal Object Detect (PMOD) and Foreign Object Detection (FOD) The bq500410A is WPC1.1 ready and supports both enhanced PMOD and FOD features by continuously monitoring the input voltage and current to calculate input power.
PAGE 15
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 Table 4. Option Select Bins 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 SEE_NOTE SEE_NOTE R22 R39 Q8-A FOD R24 Q8-B AGND PMOD Figure 5. LOSS_THR Connection Circuits NOTE Either one of these circuits is connected to LOSS_THR, but not both.
PAGE 16
bq500410A SLUSB96 – NOVEMBER 2012 www.ti.com Shut Down by Thermal Sensor or Trigger Typical applications of the bq500410A does not require additional thermal protection. This shutdown feature is provided for enhanced applications and is not limited to thermal shutdown. The key parameter is the 1.0-V threshold on pin 2. Voltage below 1.0 V on pin 2 causes the device to shut down. The application of thermal monitoring via a Negative Temperature Coefficient (NTC) sensor, for example, is straightforward.
PAGE 17
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 Power Transfer Start Signal The bq500410A 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.
PAGE 18
bq500410A SLUSB96 – NOVEMBER 2012 www.ti.com Over-Current Protection The bq500410A has an integrated current protection feature which monitors the input current reported by the current sense resistor and amplifier. If the input current exceeds a safety threshold, a fault is indicated and power transfer is halted for one minute. If this feature is desired, the sense resistor and amplifier are required. If this feature is not desired, the I_SENSE input pin to the bq500410A (pin 42) should be grounded.
PAGE 19
bq500410A www.ti.com SLUSB96 – NOVEMBER 2012 APPLICATION INFORMATION Overview The application schematic for the transmitter with reduced standby power is shown in Figure 7. CAUTION Please check the bq500410A product page for the most up-to-date schematic and list of materials reference design package before starting a new project. Input Regulator The bq500410A requires 3.3 VDC to operate. A buck regulator or a linear regulator can be used to step down from the 12-V system input.
PAGE 20
bq500410A SLUSB96 – NOVEMBER 2012 www.ti.com Input Power Requirements For full wireless power system capability and WPC compliance, the AC power adapter selected for the application should have a minimum rating of 12 V at 750 mA. PCB Layout Careful PCB layout practice is critical to proper system operation. There are many references on proper PCB layout techniques. A few good tips are repeated here: The TX layout requires a 4-layer PCB layout for best ground plane technique.
PAGE 21
Copyright © 2012, Texas Instruments Incorporated Product Folder Links: bq500410A 2 1 12V-IN DC in J2 N/C D7 C28 D3 BAT54SW D2 4 7 N/C C4 C26 C32 R37 76.8k 6 5 8 1 7 6 5 4 3 2 1 COMM+ R10 NoPop R33 76.8K R31 10.0K P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 VCC 2700pF R40 100K 330pF MSP_MISO MSP_CLK 475 475 475 R9 R32 R3 NoPop C29 COMP VSENS PH BOOT U5 TPS54231D GND SS EN 0.01uF GND ties JP1 JP2 JP3 0.
PAGE 22
DC in J2 2 1 12V-IN D7 C28 D3 BAT54SW D2 7 VIN GND SS EN 0.01uF GND ties JP1 JP2 JP3 0.1uF 10uF 4 2 N/C 3 C25 STATUS C6 1 PILOT 475 R32 N/C C4 C26 C32 R37 76.8k 6 5 7 6 5 4 3 2 1 R33 76.8K R4 3.16k C31 4.7nF R5 10.0K FOD NTC 3V3_VCC C11 4.7uF MSP_TEST MSP_SYNC MSP_TEST MSP_MISO Q8-A COMM+ COMM- 4.7nF MSP_RST FOD I_SENSE 0.1uF C22 10.0K R25 R39 MSP_CLK DOUT_TX DOUT_RX R13 10.
PAGE 23
D3 BAT54SW N/C DC in R10 NoPop COMM+ 330pF C4 R40 100K J2 2 1 R33 76.8K N/C R31 10.0K C31 4.7nF D2 4 7 COMM+ COMM- R32 1 C32 R37 76.8k 6 5 8 RESET 37 38 39 40 COMM_A+ COMM_ACOMM_B+ COMM_B- 18 MSP_CLK 21 DOUT_TX 22 DOUT_RX 6 FOD 7 MSP_RST/LED1 8 MSP_MISO/LED2 9 MSP_TEST 46 V_IN 45 V_SENSE 42 I_SENSE 4 AD08 3 AD03 2 T_SENSE 1 COIL_PEAK 5 41 RESERVED 48 ADCREF 4.7uF 1.0uF C1 DPWM_A PMOD MSP_SYNC COIL1.1 COIL1.2 COIL1.
PAGE 24
PACKAGE OPTION ADDENDUM www.ti.
PAGE 25
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-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 BQ500410ARGZR VQFN RGZ 48 2500 330.0 16.4 7.3 7.3 1.5 12.0 16.0 Q2 BQ500410ARGZT VQFN RGZ 48 250 180.0 16.4 7.3 7.3 1.5 12.0 16.0 Q2 BQ500410ARGZT VQFN RGZ 48 250 180.0 16.4 7.3 7.3 1.5 12.0 16.
PAGE 26
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ500410ARGZR VQFN RGZ 48 2500 367.0 367.0 38.0 BQ500410ARGZT VQFN RGZ 48 250 210.0 185.0 35.0 BQ500410ARGZT VQFN RGZ 48 250 210.0 185.0 35.
PAGE 27
PAGE 28
PAGE 29
PAGE 30
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.