Datasheet

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

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

Output Power (W)

Efficiency (%)

G000

Power

Stage

AC-DC

BQ500211 A

Feedback

Transmitter Receiver

Rectification

Voltage

Conditioning

Load

Controller

bq51013

Communication

Power

bq500211A

www.ti.com

SLUSBB1A – DECEMBER 2012–REVISED SEPTEMBER 2013

5-V, WPC1.1 Compliant Wireless Power Transmitter Manager

Check for Samples: bq500211A

FEATURES

DESCRIPTION

The bq500211A is a second generation digital

• Intelligent Control of Wireless Power Transfer

wireless power controller that integrates all functions

• 5-V Operation Conforms to Wireless Power

required to control wireless power transfer to a single

Consortium (WPC) Type A5 and Type A11

WPC compliant receiver. It is WPC1.1 compliant and

Transmitter Specifications

designed for 5-V systems as either a WPC type A5

transmitter with a magnetic positioning guide or as a

• WPC1.1 Compliant, Including Foreign Object

WPC type A11 transmitter without the magnetic

Detection (FOD)

guide. The bq500211A pings the surrounding

• Enhanced Parasitic Metal Detection (PMOD)

environment for WPC compliant devices to be

Assures Safety

powered, safely engages the device, receives packet

• Dynamic Power Limiting™ for USB and

communication from the powered device and

Limited Source Operation

manages the power transfer. To maximize flexibility in

wireless power applications, Dynamic Power

• Digital Demodulation Reduces Components

Limiting™ (DPL) is featured on the bq500211A. DPL

• LED Indication of Charging State and Fault

enhances user experience by seamlessly optimizing

Status

the usage of power available from limited input

supplies. The bq500211A supports both Foreign

APPLICATIONS

Object Detection (FOD) and Parasitic Metal Object

Detection (PMOD) by continuously monitoring the

• WPC 1.1 Compliant Wireless Chargers For:

efficiency of the established power transfer,

– Qi-Certified Smart Phones and other

protecting from power lost due to metal objects

Handhelds

misplaced in the wireless power transfer bath. Should

any abnormal condition develop during power

– Hermetically Sealed Devices and Tools

transfer, the bq500211A handles it and provides

– Cars and Other Vehicles

indicator outputs. Comprehensive status and fault

– Tabletop Charge Surfaces

monitoring features enable a robust system design.

• See www.ti.com/wirelesspower for More

The bq500211A is available in a 48-pin, 7 mm x 7

Information on TI's Wireless Charging

mm QFN package and operates over a temperature

Solutions

range from –40°C to 110°C.

Functional Diagram and Efficiency Versus System Output Power

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.

2Dynamic 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.

Summary of content (27 pages)

PAGE 1
bq500211A www.ti.com SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 5-V, WPC1.1 Compliant Wireless Power Transmitter Manager Check for Samples: bq500211A FEATURES DESCRIPTION • • The bq500211A is a second generation digital wireless power controller that integrates all functions required to control wireless power transfer to a single WPC compliant receiver. It is WPC1.
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bq500211A SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 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.
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bq500211A www.ti.com SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 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 bq500211A THERMAL METRIC (1) RGZ UNITS 48 PINS θJA Junction-to-ambient thermal resistance (2) 28.
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bq500211A SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 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.
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bq500211A www.ti.
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bq500211A SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 www.ti.
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bq500211A www.ti.com SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 PIN FUNCTIONS PIN NO. 3 1 45 NAME I/O DESCRIPTION AIN3 I This pin can be either connected to GND or left open. Connecting to GND can improve layout grounding. AIN5 I This pin can be either connected to GND or left open. Connecting to GND can improve layout grounding. AIN7 I This pin can be either connected to GND or left open. Connecting to GND can improve layout grounding. 35 BPCAP — Bypass capacitor for internal 1.
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bq500211A SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 www.ti.com PIN FUNCTIONS (continued) PIN NO. NAME I/O DESCRIPTION 19 RESERVED O Reserved, leave this pin open. 20 RESERVED I Reserved, connect to GND. 48 RESERVED I External Reference Voltage Input. Connect this input to GND. 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.
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bq500211A www.ti.com SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 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.
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bq500211A SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 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.
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bq500211A www.ti.com SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 Application Information Coils and Matching Capacitors The coil and matching capacitor selection for the transmitter has been established by WPC standard. This is fixed and cannot be changed on the transmitter side. An up to date list of available and compatible A5 and A11 transmitter coils can be found here (Texas Instruments Literature Number SLUA649): Capacitor selection is critical to proper system operation.
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bq500211A SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 www.ti.com Option Select Pin Two pins (pin 43 and pin 44) on the bq500211A 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 2.
PAGE 13
bq500211A www.ti.com SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 Parasitic Metal Object Detect (PMOD) and Foreign Object Detection (FOD) The bq500211A is WPC1.1 compliant and supports both enhanced PMOD and the new FOD features by continuously monitoring the input voltage and current to calculate input power.
PAGE 14
bq500211A SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 www.ti.com Shut Down via External Thermal Sensor or Trigger Typical applications of the bq500211A 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 causes the device to shutdown.
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bq500211A www.ti.com SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 Fault Handling and Indication The following is a table of End Power Transfer (EPT) packet responses, fault conditions, the duration how long the condition lasts until a retry in attempted. The LED mode selected determines how the LED indicates the condition or fault.
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bq500211A SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 www.ti.com Current Monitoring Requirements The bq500211A is WPC1.1 ready. In order to enable the PMOD or FOD features, current monitoring must be provided in the design. Current monitoring is optional however, it is used for the foreign metal protection features and over current protection. The system designer can choose not to include the current monitor and remain WPC1.0 compliant.
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bq500211A www.ti.com SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 APPLICATION INFORMATION Overview The application schematic for the transmitter with reduced standby power is shown in Figure 7. CAUTION Please check the bq500211A product page for the most up-to-date application schematic and list of materials package before starting a new design. Input Regulator The bq500211A 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.
PAGE 18
bq500211A SLUSBB1A – DECEMBER 2012 – REVISED SEPTEMBER 2013 www.ti.com 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.
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R11 10K R10 76k8 VIN AGND C4 4.7nF 50V AGND C24 4.7nF 50V IN R37 10K0 3V3_VCC 5 Vin D1 500mA Full COMM+ COMM- MSP_CLK MSP_RST MSP_MISO MSP_TEST I_SENSE DPL 3V3_VCC R25 10K 3V3_VCC AGND R4 470R BLUE_LED AGND C6 4.7uF 10V R15 10.0k R26 37 38 39 40 18 21 22 6 7 8 9 46 45 42 4 3 2 1 5 41 48 C1 1.
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3V3_VCC R25 10K 3V3_VCC 5 Vin IN COMM+ COMM- 3.3V AGND C6 4.7uF 10V 37 38 39 40 18 21 22 6 7 8 9 46 45 42 4 3 2 1 5 C1 1.0uF 16V 3V3_VCC U1 AGND COMM_A+ COMM_ACOMM_B+ COMM_B- MSP_CLK DOUT_TX DOUT_RX SLEEP MSP_RST/LED_A MSP_MISO/LED_B MSP_TEST V_SENSE AD_7 I_SENSE LOPWR AD_3 T_SENSE AD_5 RESET RESERVED RESERVED AGND 41 48 C43 4.7uF 10V AGND GND-TIE C3 1.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 10-Sep-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 BQ500211ARGZR VQFN RGZ 48 2500 330.0 16.4 7.3 7.3 1.5 12.0 16.0 Q2 BQ500211ARGZT VQFN RGZ 48 250 180.0 16.4 7.3 7.3 1.5 12.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 10-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ500211ARGZR VQFN RGZ 48 2500 367.0 367.0 38.0 BQ500211ARGZT VQFN RGZ 48 250 210.0 185.0 35.
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