Texas Instruments bq51013xEVM User manual

User's Guide
SLUUA44A–December 2012–Revised August 2013
bq51013xEVM-764 Evaluation Module (WCSP Package)
The bq51013xEVM (HPA764-001 and HPA764-003) wireless power receiver evaluation kit from TI is a
high-performance, easy-to-use development kit for the design of wireless power solutions. It helps
designers to evaluate the operation and performance of the bq51013A and bq51013B, 5-V power supply
for wireless power transfer. The bq51013A and bq51013B devices provide the AC/DC power conversion
and regulation while integrating the digital control required to comply with the Qi communication protocol.
The kit speeds up the development of end-use applications.
Contents
1 Considerations with this EVM ............................................................................................. 2
2 Modifications ................................................................................................................. 2
3 Recommended Operation Condition ..................................................................................... 2
4 Equipment and EVM setup ................................................................................................ 3
4.1 Schematic ........................................................................................................... 3
4.2 Connector and Test Point Descriptions ......................................................................... 3
4.3 Jumpers and Switches ............................................................................................ 4
4.4 Test Point Descriptions ............................................................................................ 4
4.5 Pin Description of the IC .......................................................................................... 5
5 Test Procedure .............................................................................................................. 6
5.1 Definition ............................................................................................................ 6
5.2 Recommended Test Equipment ................................................................................. 6
5.3 Equipment Setup ................................................................................................... 7
5.4 Procedure ........................................................................................................... 8
6 Test Results ................................................................................................................. 9
6.1 Load Step ........................................................................................................... 9
6.2 Load Dump ......................................................................................................... 9
6.3 Start-Up ............................................................................................................ 10
6.4 Efficiency .......................................................................................................... 11
6.5 Thermal Performance ............................................................................................ 11
6.6 WPC 1.1 certification ............................................................................................. 12
7 Layout and Bill of Material ................................................................................................ 13
7.1 Layout .............................................................................................................. 13
7.2 Bill of Materials (BOM) ........................................................................................... 16
List of Figures
1 HPA764 Schematic......................................................................................................... 3
2 Test Set up .................................................................................................................. 7
3 Load Step, 0 mA to 500 mA .............................................................................................. 9
4 Load Dump, 500 mA to 0 mA ........................................................................................... 10
5 Start-Up .................................................................................................................... 10
6 Efficiency for the bq51013A vs. IBAT .................................................................................. 11
7 Thermal Image............................................................................................................. 11
8 WPC 1.1 Certification for the bq51013BEVM-764 ................................................................... 12
9 bq51013BEVM Layout Example ........................................................................................ 13
10 bq51050BEVM-764 Top Assembly ..................................................................................... 14
bqTESLA is a trademark of Texas Instruments, Inc..
1
SLUUA44A–December 2012–Revised August 2013 bq51013xEVM-764 Evaluation Module (WCSP Package)
Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated

Considerations with this EVM www.ti.com
11 bq51050BEVM-764 Top Layer .......................................................................................... 14
12 bq51050BEVM-764 Bottom Copper Layer ............................................................................ 15
13 bq51050BEVM-764 Bottom Assembly ................................................................................. 15
List of Tables
1 Table 1. bq51013AEVM-764 Electrical Performance Specifications................................................. 2
2 Pin Description .............................................................................................................. 5
3 bq51013BEVM-764 Bill of Materials ................................................................................... 16
1 Considerations with this EVM
The bq51013xEVM-764 evaluation module (HPA764-001 and 003) demonstrates the receiver portion of
the bqTESLA™ wireless power system. This receiver EVM is a complete receiver-side solution that
produces 5-V output at up to 1-A load.
• The bqTESLA receiver is used in any number of low-power battery portable devices such as a direct
battery charger. With contact-free charging capability, no connections to the device are needed.
• Output voltage of 5 V up to 1-A charge current
• External adapter switchover
• Low-profile, external pick-up coil
• Frame is configured to provide correct receiver to transmitter spacing
• Room above coil for testing with battery, key for tuning
• Option to adjust the max output current using variable resistor R16
2 Modifications
Refer to the datasheet when changing components (SLUSAY6 for bq51013A and SLUSB62 for the
bq51013B). To aid in such customization of the EVM, the board was designed with devices having 0603
or larger footprints. A real implementation likely occupies less total board space.
Note that changing components can improve or degrade EVM performance.
3 Recommended Operation Condition
Table 1 provides a summary of the bq51013xEVM-764 performance specifications. All specifications are
given for an ambient temperature of 25°C.
Table 1. Table 1. bq51013AEVM-764 Electrical Performance Specifications
Parameter Test Condition MIN TYP MAX UNIT
VIN Input voltage Typical Vrect Voltage at TP12 4.0 5.5 8 V
range
Vadapter Adapter input 4.0 7 20 V
voltage
OVP Input Voltage at V-rectified 1.5 A
overvoltage
protection
IOUT Output current Current limit programming range 1.5 A
range
VOUT Output voltage ILOAD = 1000 mA 5 V
Fs Switching 110 205 kHz
frequency
Efficiency AC-DC 1-A Fast charge current, VBAT = 4.2 V 74 %
efficiency
2bq51013xEVM-764 Evaluation Module (WCSP Package) SLUUA44A–December 2012–Revised August 2013
Submit Documentation Feedback
Copyright © 2012–2013, Texas Instruments Incorporated

1
1
1
1
1
www.ti.com Equipment and EVM setup
4 Equipment and EVM setup
4.1 Schematic
Figure 1. HPA764 Schematic
4.2 Connector and Test Point Descriptions
The connection points are described in the following paragraphs.
4.2.1 J1 – AD External Adapter Input, J2-GND
Power cannot be provided to simulate an external adapter applied to the receiver in this bq51013xEVM-
764 (HPA764).
4.2.2 J3 – Output Voltage, J4-GND
Output voltage is 5 V in wireless power mode up to 1 A; the adapter option is not supported in this
HPA764-002.
4.2.3 J5 – TS and Return Connector
External connection for temperature sense resistor, see the datasheet for additional information.
4.2.4 J6 – Programming Connector
This connector is populated and is only useful at the factory level for programming the IC.
3
SLUUA44A–December 2012–Revised August 2013 bq51013xEVM-764 Evaluation Module (WCSP Package)
Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated

Equipment and EVM setup www.ti.com
4.3 Jumpers and Switches
The control jumpers are described in the following paragraphs.
4.3.1 JP1 – EN1 Enable 1
Not populated in this EVM (HPA764-001 and 003).
4.3.2 JP2 – EN2 Enable 2
Enable signal input that allows the system to assert wireless charging. If EN2 is set to low, wireless
charging is enabled unless AD voltage > 3.6 V. If EN2 is set to High, AD mode disabled, wireless charging
always enabled. Used when OTG plus wireless charging is active.
4.3.3 JP3 – TS Enable or Disable
This jumper enables the TS adjustment feature using R3. The disable position sets voltage at the TS pin
to a safe value. The default shorting jumper setting is disabled.
4.3.4 JP4 – Pull-Up to Out or Vz
EN2 pull-up can be powered from OUT or RECT. Vz is derived from RECT through a resistor and Zener
diode D2.
4.3.5 JP5 – Termination
This jumper along with R14 and R13 are not installed in HPA764 - 001-003.
4.3.6 JP6 – ILIM Fix or ADJ
Max output current is set by ILIM pin. In the FIX position, the current is set to a fixed value. In the ADJ
position the current is set by R16.
4.4 Test Point Descriptions
The test points are described in the following paragraphs.
4.4.1 TP1 – AD-EN
This push-pull driver for the external PFET connects the adapter and the output from the bq5101x. This is
not useful for the bq5105x.
4.4.2 TP2 – AC Input 2
This is the test point for measuring AC voltage applied to the EVM from the receiver coil.
4.4.3 TP3 – COM2 Communication 2 Drive
Communication driver signal, open-drain output connected to communication capacitor.
4.4.4 TP4 – AC Input 1
This is the test point for measuring AC voltage applied to the EVM from the receiver coil.
4.4.5 TP5 – CLMP 1
Overvoltage clamp driver signal, open-drain output is connected to OVP capacitor.
4.4.6 TP6 – CLMP 2
Overvoltage clamp drive signal, open-drain output is connected to OVP capacitor.
4bq51013xEVM-764 Evaluation Module (WCSP Package) SLUUA44A–December 2012–Revised August 2013
Submit Documentation Feedback
Copyright © 2012–2013, Texas Instruments Incorporated

www.ti.com Equipment and EVM setup
4.4.7 TP7 – OUT Output Voltage
This test point is the output voltage from the bq51050B.
4.4.8 TP8 – Boot-1 Boot Capacitor
This bootstrap capacitor 1 drive connects to the integrated circuit (IC).
4.4.9 TP9 – Boot-2 Boot Capacitor
This bootstrap capacitor 2 drive connects to the IC.
4.4.10 TP10 – CHG Charge
This output signal indicates that the output current is being delivered to OUT, the open-drain output.
4.4.11 TP11 – AC1 IC input
This is the AC input to the IC from series capacitors.
4.4.12 TP12 – Rectified Voltage
The input AC voltage is rectified into unregulated DC voltage; additional capacitance is used to filter the
voltage before the regulator.
4.4.13 TP13, TP14, TP15 – GND
These are the ground test points.
4.4.14 TP16 – TS Temp Sensor
This is the connection point for external thermistor; see the data sheet for additional information.
4.4.15 TP17 – FET Open Detection (FOD)
Input for rectified power measurement, pin F2 of the IC.
4.4.16 TP18– ILIM
Programming pin for over current limit, pin G1 of the IC.
4.5 Pin Description of the IC
Table 2. Pin Description
PIN Number (WCSP) bq51013B and bq51013A
A1, A2, A3, A4 PGND
B1, B2 AC2, AC2
B3, B4 AC1, AC1
C1 BOOT2
C2, C3 RECT
C4 BOOT1
D1, D2, D3, D4 OUT
E1 COM2
E2 CLMP2
E3 CLMP1
E4 COM1
F1 TS/CTRL
5
SLUUA44A–December 2012–Revised August 2013 bq51013xEVM-764 Evaluation Module (WCSP Package)
Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated

Test Procedure www.ti.com
Table 2. Pin Description (continued)
PIN Number (WCSP) bq51013B and bq51013A
F2 FOD
F3 AD-EN
F4 CHG
G1 ILIM
G2 EN2
G3 EN1
G4 AD
5 Test Procedure
This procedure describes test configuration of the bq51013B evaluation board (HPA764-003) for bench
evaluation.
5.1 Definition
The following naming conventions are used:
VXXX : External voltage supply name (VADP, VBT, VSBT)
LOADW: External load name (LOADR, LOADI)
V(TPyy): Voltage at internal test point TPyy. For example, V(TP02) means the voltage at TP02.
V(Jxx): Voltage at header Jxx
V(TP(XXX)): Voltage at test point XXX. For example, V(ACDET) means the voltage at the test point which
is marked as ACDET.
V(XXX, YYY): Voltage across point XXX and YYY.
I(JXX(YYY)): Current going out from the YYY terminal of header XX.
Jxx(BBB): Terminal or pin BBB of header xx.
JPx ON: Internal jumper Jxx terminals are shorted.
JPx OFF : Internal jumper Jxx terminals are open.
JPx (-YY-) ON: Internal jumper Jxx adjacent terminals marked as YY are shorted.
Assembly drawings have location for jumpers, test points, and individual components.
5.2 Recommended Test Equipment
The following equipment is needed to complete this test procedure.
5.2.1 Power Supplies
A power supply capable of supplying 19 V at 1 A is required for testing procedures.
5.2.2 Loads
A resistive load or electronic load set to 5 Ωat 1 A, 10 Ωat 500 mA, and 5 kΩat 1 mA, power rating
should be 5 W.
5.2.3 Meters
Two DC voltmeters and two DC ammeters are required.
6bq51013xEVM-764 Evaluation Module (WCSP Package) SLUUA44A–December 2012–Revised August 2013
Submit Documentation Feedback
Copyright © 2012–2013, Texas Instruments Incorporated

Wireless
Transmitter
A
V
PS
bq51013xEVM
HPA764- Load
A
V
VOUT
GND
VIN
GND
(001 and 003)
www.ti.com Test Procedure
5.2.4 bqTesla Transmitter
The transmitter HPA689 or equivalent is used for final test.
5.3 Equipment Setup
5.3.1 Test Set Up
The final assembly is tested using a bqTesla transmitter, provided (HPA689). Input voltage to the
transmitter is set to 19 VDC ±200 mV with a current limit of 1.0 A and connection to J1 and J2. Set the
power supply to OFF. Place UUT on the transmitter coil. Unit under test is placed in the center of the
HPA689 TX coil.
Other bqTesla transmitter base units are also acceptable for this test.
Figure 2. Test Set up
5.3.2 Load
The load is connected between J3 - OUT and J4 - GND of the UUT. A DC ammeter is connected between
UUT and Load. Set the load for 10 Ωat 500 mA.
5.3.3 Jumper Settings
JP1 →EN1/TERM and LOW shorted
JP2 →EN2 and LOW shorted
JP3 →TS and DIS shorted
JP4 →Pullup and Vz shorted
JP5 →Open
JP6 →ILIM and ADJ shorted
5.3.4 Meters
• Connect ammeter to measure 19-V input current to transmitter.
• Connect voltmeter to monitor input voltage at J1 and J2 of TX unit.
• On UUT, a voltmeter is used to measure output voltage at TP7 with ground at J4.
• Connect ammeter to measure load current.
5.3.5 R3 Set Up
Connect ohmmeter across J5. Connect shorting jumper JP3 from TS to EN. Adjust R3 for a 10 kΩ,
±200-Ωreading on the ohmmeter.
5.3.6 R16 Set Up
Connect ohmmeter between JP6 - ADJ and J2 - GND. Adjust R16 for 300 Ω, ±20-Ωreading on the
ohmmeter.
7
SLUUA44A–December 2012–Revised August 2013 bq51013xEVM-764 Evaluation Module (WCSP Package)
Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated

Test Procedure www.ti.com
5.4 Procedure
5.4.1 Turn ON Operation and Operation at 500 mA Load
• Turn ON transmitter power supply (19 V)
• Transmitter – verify LED D2 is ON
• UUT — Adjust load current to 500 mA, ±50 mA
• Turn ON emulator PS#2 (3.6 V)
• Put the receiver EVM on the transmitter coil and align them correctly
• After 5 seconds, verify that:
1. Transmitter – status LED D5 is flashing green ~ 1 s
2. The transmitter beeps
3. Transmitter – LED D2 is still ON
4. Receiver – LED D1 is ON
• UUT — Verify that VOUT is 4.9 V to 5.1 V ( Between J3 or TP7 and J4)
• UUT — Verify that rectified voltage should be 5.1 V to 5.25 V (between TP12 and TP13) (Note: a
modulation signal is present on this voltage every 250 milliseconds and may cause fluctuation in the
reading use lower value or base line)
5.4.2 Efficiency Test (500-mA Load)
• Verify that the input current to TX is less than 210 mA with input voltage at 19 VDC
• Turn OFF transmitter power supply
5.4.3 Operation (1-mA Load)
• Turn ON transmitter power supply
• Transmitter — Verify LED D2 is ON
• UUT — Adjust load current to 1 mA, ±200 µA
• Put the receiver EVM on the transmitter coil and align them correctly
• After 5 seconds, verify that:
1. Transmitter – status LED D5 is flashing green ~ 1 second
2. The transmitter beeps
3. Transmitter – LED D2 is still ON
4. Receiver – LED D1 is ON
• UUT — Verify that VOUT is 4.9 V to 5.1 V ( Between J3 or TP7 and J4)
• UUT — Verify that rectified voltage is 6.9 V to 7.5 V (between TP12 and TP13) (Note: a modulation
signal is present on this voltage every 250 milliseconds and may cause fluctuation in the reading use
lower value or base line)
5.4.4 Operation (1-A Load)
• UUT — Adjust load current to 00 mA, ±50 mA
• UUT — Verify that VOUT is 4.9 V to 5.1 V ( Between J3 or TP7 and J4)
• UUT — Verify that rectified voltage is 5.0 V to 5.2 V (between TP12 and TP13) (Note: a modulation
signal is present on this voltage every 250 milliseconds and may cause fluctuation in the reading use
lower value or base line)
5.4.5 Efficiency Test (1-A Load)
• Verify that the input current to TX is less than 380 mA with input voltage at 19 VDC
• Turn OFF transmitter power supply
8bq51013xEVM-764 Evaluation Module (WCSP Package) SLUUA44A–December 2012–Revised August 2013
Submit Documentation Feedback
Copyright © 2012–2013, Texas Instruments Incorporated

www.ti.com Test Results
5.4.6 Adapter Test (500-mA Load)
• Connect a 6-V, ±200-mV power supply with a current limit set to 1.0 A to J1 and return to J2.
• Adjust load current to 500 mA, ±50 mA
• Turn on power supply
• Verify that:
1. UUT — LED D1 is OFF
2. UUT — TP7 VOUT is 5.75 V to 6 V
3. Transmitter – Status LED D5 is OFF
6 Test Results
6.1 Load Step
The procedure for load step is as follows:
• Set up the test bench as described in Section 5.
• Power TX with 19 V.
• Provide a load step from no load (high impedance) to 10 Ωor 500 mA (if using current source load).
• Monitor load current, rectifier voltage, and output voltage as shown in Figure 3.
Figure 3. Load Step, 0 mA to 500 mA
6.2 Load Dump
The procedure for load dump is as follows:
• Set up the test bench as described in Section 5.
• Power TX with 19 V
• Provide a load dump from 10ohms or 500 mA (if using a current source load) to no load (high
impedance).
• Monitor load current, rectifier voltage, and output voltage as shown in Figure 4.
9
SLUUA44A–December 2012–Revised August 2013 bq51013xEVM-764 Evaluation Module (WCSP Package)
Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated

Test Results www.ti.com
Figure 4. Load Dump, 500 mA to 0 mA
6.3 Start-Up
These procedures demonstrates start-up:
• Set up the test bench as described in Section 5.
• Power TX with 19 V
• Trigger scope sweep on TP2 AC IN
Figure 5. Start-Up
10 bq51013xEVM-764 Evaluation Module (WCSP Package) SLUUA44A–December 2012–Revised August 2013
Submit Documentation Feedback
Copyright © 2012–2013, Texas Instruments Incorporated