Datasheet

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AC to DC

Voltage

Conditioning

Controller

RectificationDrivers Load

Controller

V/I

Sense

Power

Transmitter Receiver

bq5101x

bq500210

Communication

bq51013B

www.ti.com

SLUSB62A –MARCH 2013–REVISED OCTOBER 2013

Highly Integrated Wireless Receiver Qi (WPC V1.1) Compliant Power Supply

Check for Samples: bq51013B

FEATURES

• Supports 20-V Maximum Input

• Low-power Dissipative Rectifier Overvoltage

• Integrated Wireless Power Supply Receiver

Clamp (V

OVP

= 15V)

Solution

• Thermal Shutdown

– 93% Overall Peak AC-DC Efficiency

• Multifunction NTC and Control Pin for

– Full Synchronous Rectifier

Temperature Monitoring, Charge Complete and

– WPC v1.1 Compliant Communication

Fault Host Control

Control

• 1.9 x 3mm DSBGA or 4.5 x 3.5mm QFN

– Output Voltage Conditioning

Package

– Only IC Required Between RX coil and

Output

APPLICATIONS

• WPC v1.1 Compliant (FOD Enabled) Highly

• WPC Compliant Receivers

Accurate Current Sense

• Cell Phones, Smart Phones

• Dynamic Rectifier Control for Improved Load

• Headsets

Transient Response

• Digital Cameras

• Dynamic Efficiency Scaling for Optimized

Performance Over wide Range of Output • Portable Media Players

Power

• Hand-held Devices

• Adaptive Communication Limit for Robust

Communication

DESCRIPTION

The bq5101xB is a family of advanced, flexible, secondary-side devices for wireless power transfer in portable

applications. The bq5101xB devices provide the AC/DC power conversion and regulation while integrating the

digital control required to comply with the Qi v1.1 communication protocol. Together with the bq50xxx primary-

side controller, the bq5101xB enables a complete contact-less power transfer system for a wireless power supply

solution. Global feedback is established from the secondary to the primary in order to control the power transfer

process utilizing the Qi v1.1 protocol.

The bq5101xB devices integrate a low resistance synchronous rectifier, low-dropout regulator, digital control, and

accurate voltage and current loops to ensure high efficiency and low power dissipation.

The bq5101xB also includes a digital controller that can calculate the amount of power received by the mobile

device within the limits set by the WPC v1.1 standard. The controller will then communicate this information to

the transmitter in order to allow the transmitter to determine if a foreign object is present within the magnetic

interface and introduces a higher level of safety within magnetic field. This Foreign Object Detection (FOD)

method is part of the new requirements under the WPC v1.1 specification.

Figure 1. Wireless Power Consortium (WPC or Qi) Inductive Power System

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 (43 pages)

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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 Highly Integrated Wireless Receiver Qi (WPC V1.1) Compliant Power Supply Check for Samples: bq51013B FEATURES • • 1 • • • • • Integrated Wireless Power Supply Receiver Solution – 93% Overall Peak AC-DC Efficiency – Full Synchronous Rectifier – WPC v1.1 Compliant Communication Control – Output Voltage Conditioning – Only IC Required Between RX coil and Output WPC v1.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com ORDERING INFORMATION Part NO Marking Function Package Ordering Number (Tape and Reel) Quantity bq51013BYFPR 3000 DSBGA-YFP bq51013B bq51013B 5V Regulated Power Supply QFN-RHL bq51013BYFPT 250 bq51013BRHLR 3000 bq51013BRHLT 250 AVAILABLE OPTIONS Function WPC Version VRECT-OVP VOUT-(REG) Over Current Shutdown AD-OVP 5V Power Supply v1.1 15V 5V Disabled Disabled Disabled Adaptive + 1s HoldOff v1.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 THERMAL INFORMATION THERMAL METRIC (1) RHL YFP 20 PiNS 28 PINS θJA Junction-to-ambient thermal resistance 37.7 58.9 θJCtop Junction-to-case (top) thermal resistance 35.5 0.2 θJB Junction-to-board thermal resistance 13.6 9.1 ψJT Junction-to-top characterization parameter 0.5 1.4 ψJB Junction-to-board characterization parameter 13.5 8.9 θJCbot Junction-to-case (bottom) thermal resistance 2.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com System Load Q1 USB or AC Adapter Input /AD-EN AD OUT CCOMM1 C5 COMM1 C4 BOOT1 ROS2 ROS1 CBOOT1 RECT C1 AC1 COIL R4 C3 bq5101xB D1 C2 TS-CTRL AC2 NTC BOOT2 CBOOT2 HOST COMM2 /WPG CCOMM2 CCLAMP2 CCLAMP1 Tri-State CLAMP2 EN1 / TERM Bi-State CLAMP1 EN2 Bi-State FOD ILIM PGND RTERM (bq51014) R1 RFOD Figure 3.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 ELECTRICAL CHARACTERISTICS over operating free-air temperature range, –40°C to 125°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX 2.7 2.8 Undervoltage lock-out VRECT: 0V → 3V Hysteresis on UVLO VRECT: 3V → 2V Hysteresis on OVP VRECT: 16V → 5V Input overvoltage threshold VRECT: 5V → 16V Dynamic VRECT Threshold 1 ILOAD < 0.1 x IIMAX (ILOAD rising) 7.08 Dynamic VRECT Threshold 2 0.1 x IIMAX < ILOAD < 0.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range, –40°C to 125°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX 2 2.2 2.4 56.5 58.7 60.8 18.5 19.
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bq51013B www.ti.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.
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bq51013B www.ti.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com PIN FUNCTIONS (continued) NAME YFP RHL I/O DESCRIPTION Programming pin for the over current limit. Connect external resistor to VSS. Size RILIM with the following equation: RILIM = 250 / IMAX where IMAX is the expected maximum output current of the wireless power supply. The hardware current limit (IILIM) will be 20% greater than IMAX or 1.2 x I/O 1 MAX.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 TYPICAL CHARACTERISTICS (continued) 80 7.5 70 VRECT_RISING 7.0 VRECT_FALLING 60 VRECT (V) Efficiency (%) 50 40 30 6.5 6.0 20 5.5 RILIM = 250 Ω 10 RILIM = 500 Ω 0 0 1 2 3 Power (mW) 4 5.0 5 0 40 60 80 100 120 Iout (mA) Figure 7. Light Load System Efficiency Improvement due to Dynamic Efficiency Scaling Feature(1) Figure 8. VRECT vs. ILOADat RILIM = 220Ω 7.5 1.2 1.1 RILIM = 250 Ω 7.0 1.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com TYPICAL CHARACTERISTICS (continued) 4.99 100.0 4.985 90.0 4.98 80.0 Output Ripple (mV) Vout(V) 4.975 4.97 4.965 4.96 70.0 60.0 50.0 4.955 40.0 4.95 4.945 0.0 0.2 0.4 0.6 0.8 1.0 1.2 30.0 0.0 0.2 Output Current (A) Figure 11. ILOAD Sweep (I-V Curve) 0.4 0.6 Load Current (A) 0.8 1.0 Figure 12. Output Ripple vs. ILOAD (COUT = 1µF) without communication 5.004 Vout (V) 5.002 5.000 4.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 TYPICAL CHARACTERISTICS (continued) VRECT VRECT VOUT VOUT Figure 15. 1A Load Step Full System Response Figure 16. 1A Load Dump Full System Response VRECT VTS/CTRL VRECT VOUT Figure 17. Rectifier Overvoltage Clamp (fop = 110kHz) Figure 18. TS Fault VRECT VRECT VOUT VOUT Figure 19. Adapter Insertion (VAD = 10V) Figure 20.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com TYPICAL CHARACTERISTICS (continued) IOUT VAD VRECT VRECT Figure 21. On the Go Enabled (VOTG = 3.5V)(4) VOUT Figure 22. bq51013B Typical Startup with a 1A System Load IOUT IOUT VRECT VRECT VOUT VOUT Figure 23. Adaptive Communication Limit Event Where the 400 mA Current Limit is Enabled (IOUT-DC < 300 mA) 14 Figure 24.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 TYPICAL CHARACTERISTICS (continued) Figure 25. Rx Communication Packet Structure (1) Efficiency measured from DC input to the transmitter to DC output of the receiver. Transmitter was the bq500210 EVM. Measurement subject to change if an alternate transmitter is used. (2) Curves illustrates the resulting ILIM current by sweeping the output voltage at different RILIM settings.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com A Brief Description of the Wireless System: A wireless system consists of a charging pad (transmitter or primary) and the secondary-side equipment (receiver or secondary). There is a coil in the charging pad and in the secondary equipment which are magnetically coupled to each other when the secondary is placed on the primary. Power is then transferred from the transmitter to the receiver via coupled inductors (e.g. an air-core transformer).
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 Using the bq5101xB as a Wireless Power Supply: (See Figure 3) Figure 3 is the schematic of a system which uses the bq51013B as power supply while power multiplexing the wired (adapter) port. When the system shown in Figure 3 is placed on the charging pad, the receiver coil is inductively coupled to the magnetic flux generated by the coil in the charging pad which consequently induces a voltage in the receiver coil.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com Tx Powered without Rx Active Tx Extended Digital Ping EN1/EN2/AD/TS-CTRL EPT Condition? Yes Send EPT packet with reason value No Identification and Configuration and SS, Received by Tx? No Yes Power Contract Established. All proceeding control is dictated by the Rx. Yes VRECT < 7V? Send control error packet to increase VRECT No Startup operating point established. Enable the Rx output. Rx Active Power Transfer Stage Figure 27.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 Rx Active Power Transfer Stage Rx Shutdown conditions per the EPT Table? Yes Tx Powered without Rx Active Send EPT packet with reason value No IOUT < 10% of IMAX? Yes VRECT target = 7V. Send control error packets to converge. No Yes VRECT target = 6.3V. Send control error packets to converge. Yes VRECT target = 5.5V. Send control error packets to converge. IOUT < 20% of IMAX? No IOUT < 40% of IMAX? No VRECT target= 5.1V.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com Dynamic Efficiency Scaling The Dynamic Efficiency Scaling feature allows for the loss characteristics of the bq5101xB to be scaled based on the maximum expected output power in the end application. This effectively optimizes the efficiency for each application. This feature is achieved by scaling the loss of the internal LDO based on a percentage of the maximum output current.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 Adapter Enable Functionality and EN1/EN2 Control Figure 3 is an example application that shows the bq5101xB used as a wireless power receiver that can power mutliplex between wired or wireless power for the down-system electronics. In the default operating mode pins EN1 and EN2 are low, which activates the adapter enable functionality.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com Table 4. Message Value Condition Unknown 0x00 AD > 3.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 Power AC to DC bq5101x Drivers Rectification Voltage Conditioning Communication Controller V/I Sense Controller bq500210 Transmitter 0 Receiver 1 0 1 0 TX COIL VOLTAGE / CURRENT Figure 31. The WPC protocol uses a differential bi-phase encoding scheme to modulate the data bits onto the Tx coil voltage/current. Each data bit is aligned at a full period of 0.5 ms (tCLK) or 2 kHz.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com Each packet format is organized as shown in Figure 34. Preamble Header Message Checksum Figure 34. Packet Format (WPC volume 1: Low Power, Part 1 Interface Definition) Figure 25 above shows an example waveform of the receiver sending a rectified power packet (header 0x04). Communication Modulator The bq5101xB provides two identical, integrated communication FETs which are connected to the pins COM1 and COM2.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 Figure 36. Capacitive Load Modulation Adaptive Communication Limit The Qi communication channel is established via backscatter modulation as described in the previous sections. This type of modulation takes advantage of the loosely coupled inductor relationship between the Rx and Tx coil.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com Synchronous Rectification The bq5101xB provides an integrated, self-driven synchronous rectifier that enables high-efficiency AC to DC power conversion. The rectifier consists of an all NMOS H-Bridge driver where the backgates of the diodes are configured to be the rectifier when the synchronous rectifier is disabled. During the initial startup of the WPC system the synchronous rectifier is not enabled.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 Where: R NTC TCOLD R NTC THOT bæçç 1TCOLD-1To ö÷÷ ø = R oe è bæçç 1 -1To ö÷÷ ø = R oe è THOT (4) where, TCOLD and THOT are the desired temperature thresholds in degrees Kelvin. RO is the nominal resistance and β is the temperature coefficient of the NTC resistor. RO is fixed at 20 kΩ. An example solution is provided: • R1 = 4.23kΩ • R3 = 66.8kΩ where the chosen parameters are: • %VHOT = 19.6% • %VCOLD = 58.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com 240 ms ms 240 Figure 39. Timing Diagram for TS Detection Circuit 3-state Driver Recommendations for the TS-CTRL Pin The TS-CTRL pin offers three functions with one 3-state driver interface 1. NTC temperature monitoring, 2. Fault indication, 3. Charge done indication A 3-state driver can be implemented with the circuit in Figure 40 and the use of two GPIO connections. BATT M3 TERM TS-CTRL FAULT M4 Figure 40.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 WPC 1.1 Compliance – Foreign Object Detection The bq5101xB is a WPC 1.1 compatible device. In order to enable a Power Transmitter to monitor the power loss across the interface as one of the possible methods to limit the temperature rise of Foreign Objects, the bq5101xB reports its Received Power to the Power Transmitter.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com Figure 42. WPC v1.1 Receiver Coil Test Fixture for the Inductance Measurement Ls’ (copied from System Description Wireless Power Transfer, volume 1: Low Power, Part 1 Interface Definition, Version 1.1) The primary shield is to be 50 mm x 50 mm x 1 mm of Ferrite material PC44 from TDK Corp. The gap dZ is to be 3.4 mm. The receiver coil, as it will be placed in the final system (e.g.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 A CS VIN LS CD CB RL V Figure 43. Load-Line Analysis Test Bench Where: • VIN is a square-wave power source that should have a peak-to-peak operation of 19V. • CP is the primary series resonant capacitor (i.e. 100 nF for Type A1 coil). • LP is the primary coil of interest (i.e. Type A1). • LS is the secondary coil of interest. • CS is the series resonant capacitor chosen for the receiver coil under test.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com What this plot conveys about the operating point is that a specific load and rectifier target condition consequently results in a specific operating frequency (for the type A1 TX). For example, at 1 A the dynamic rectifier target is 5.15 V. Therefore, the operating frequency will be between 150kHz and 160kHz in the above example. This is an acceptable operating point.
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bq51013B www.ti.com SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 It is recommended that all inductance measurements are repeated in the designers specific system as there are many influence on the final measurements.
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bq51013B SLUSB62A – MARCH 2013 – REVISED OCTOBER 2013 www.ti.com REVISION HISTORY NOTE: Page numbers of current version may differ from previous versions. Changes from Original (March 2013) to Revision A Page • Changed UVLO spec MIN value from 2.6 to 2.5 .................................................................................................................. 5 • Changed ILIM_SC spec MIN value from 120 to 116 ....................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 3-Aug-2013 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.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Aug-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device BQ51013BRHLR Package Package Pins Type Drawing VQFN RHL 20 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 3000 330.0 12.4 3.8 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 4.8 1.6 8.0 12.0 Q1 BQ51013BRHLT VQFN RHL 20 250 180.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1 BQ51013BYFPR DSBGA YFP 28 3000 180.0 8.4 2.0 3.13 0.6 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 24-Aug-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ51013BRHLR VQFN RHL 20 3000 367.0 367.0 35.0 BQ51013BRHLT VQFN RHL 20 250 210.0 185.0 35.0 BQ51013BYFPR DSBGA YFP 28 3000 182.0 182.0 17.0 BQ51013BYFPT DSBGA YFP 28 250 182.0 182.0 17.
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