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bq51013AEVM-765
User Manual
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Texas Instruments bq51013AEVM-765 User Manual

User's Guide
SLUU911–June 2012

bq51013AEVM-765 Evaluation Module

The bq51013AEVM-765 wireless power receiver evaluation kit from Texas Instruments is a high­performance, easy-to-use development kit for the design of wireless power solutions. Consisting of a 5-V power supply receiver and associated magnetics, the kit enables designers to speed the development of their end-applications.
Contents
2 bq51013AEVM-765 Electrical Performance Specifications ........................................................... 2
4 Connector and Test Point Descriptions .................................................................................. 2
4.1 Input/Output Connections ......................................................................................... 2
4.2 Jumpers/Switches .................................................................................................. 3
4.3 Test Point Descriptions ............................................................................................ 3
5 Schematic and Bill of Materials ........................................................................................... 5
6 Test Setup ................................................................................................................... 6
6.1 Equipment ........................................................................................................... 6
6.2 Equipment Setup ................................................................................................... 7
6.3 Load Step ........................................................................................................... 8
6.4 Load Dump ......................................................................................................... 9
6.5 V-Adapter Input ..................................................................................................... 9
6.6 Start-Up ............................................................................................................ 10
6.7 Disable Shutdown ................................................................................................ 10
6.8 System Efficiency ................................................................................................. 11
6.9 Dynamic Rectifier Control / Dynamic Efficiency Scaling .................................................... 11
7 Layout Guidelines ......................................................................................................... 12
8 bq51013AEVM-765 Assembly Drawings and Layout ................................................................. 13
9 Reference ................................................................................................................... 16
List of Figures
1 HPA765AEVM Schematic ................................................................................................. 5
2 Equipment Setup............................................................................................................ 7
3 Load Step, 0 mA to 500 mA............................................................................................... 8
6 Start-Up..................................................................................................................... 10
7 Equipment Shutdown Wireless Disable ................................................................................ 10
8 bq51013AEVM-765 Efficiency vs Output Power ...................................................................... 11
9 bq51013AEVM-765 V-rect vs Output Power........................................................................... 11
10 QFN Layout ................................................................................................................ 12
11 Top Assembly.............................................................................................................. 13
12 Top Copper Layer......................................................................................................... 14
13 Bottom Copper Layer .................................................................................................... 15
14 Bottom Assembly.......................................................................................................... 16
bqTESLA is a trademark of Texas Instruments.
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Applications
List of Tables
1 bq51013AEVM-765 Electrical Performance Specifications ........................................................... 2

1 Applications

The bq51013AEVM-765 evaluation module (EVM) demonstrates the receiver portion of the bqTESLA™ wireless power system. This receiver EVM is a complete receiver-side solution that produces 5 V out at up to 1 A when coupled with the bqTESLA™ transmitter. The bq51013AEVM-765 device shown on this EVM along with external components that support the device for a complete solution.
• The bqTESLA™ receiver can be used in any number of low-power battery portable devices as a power
source for charging. With contact-free charging capability, no connections to the device are needed.
• Output voltage of 5 V up to 1 A
• External adapter switchover and control circuit
• 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
• Adjustable resistor R16 can be used to set max output current

2 bq51013AEVM-765 Electrical Performance Specifications

Table 1 provides a summary of the bq51013AEVM-765 performance specifications. All specifications are
given for an ambient temperature of 25°C.
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Table 1. bq51013AEVM-765 Electrical Performance Specifications
Parameter Notes and Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
V
IN
V
ADAPTER
OVP
OUTPUT CHARACTERISTICS
V
OUT
I
OUT
SYSTEMS CHARACTERISTICS
F
S
Eff Efficiency Output current 500 mA 74 %
Input Voltage Typical V-rectified voltage at TP12 4 5.5 8 V Adapter Input Voltage 4 7 20 V Input Overvoltage Voltage at V-rectified 15 V
Protection
V J3 to J4 5 V I J3 1 A
Switching Frequency 110 205 kHz

3 Modifications

See the data sheet (SLUSAY6) when changing components. 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.

4 Connector and Test Point Descriptions

4.1 Input/Output Connections

The connections points are described in the following paragraphs.
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4.1.1 J1 – AD External Adapter Input, J2-GND
Power can be provided to simulate an external adapter applied to the receiver. When this is done, an End Power Transfer signal is sent to the transmitter which enters a low power state. External adapter voltage must be a minimum of 4 V but not exceed 20V.
4.1.2 J3 – Output Voltage, J4-GND
Output voltage is 5 V in wireless power mode up to 1 A or adapter voltage if adapter is used.
4.1.3 J5 – TS and Return Connector
External connection for Temperature Sense Resistor, see data sheet for additional info.
4.1.4 J6 – Programming Connector
This connector is only useful at factory level.

4.2 Jumpers/Switches

The control jumpers are described in the following paragraphs.
4.2.1 JP1 – EN1 Enable 1
One of two Enable signals that controls the Adapter and Wireless power transfer. Low on EN1 enables the wireless power transfer; High disables the wireless power transfer. The Default Shorting jumper setting is Low.
Connector and Test Point Descriptions
4.2.2 JP2 – EN2 Enable 2
One of two Enable signals that controls the Adapter and Wireless power transfer. Low on EN2 enables the adapter power transfer also High disables Comm-I
4.2.3 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
4.2.4 JP4 – Pull-Up to Out or Vz
EN1 and EN2 pull-up along with LED D1 can be powered from OUT or RECT. Vz is derived from RECT through a resistor and zener diode.
4.2.5 JP5 – CS100 TS Enable or Disable
Only used for bq51014 device. This jumper along with R14 and R13 will enable the Charge Status 100% feature. See data sheet for additional info. Open will disable.
4.2.6 JP6 – ILIM Fix or ADJ
Max output current is set by I-lim pin. In the FIX position current is set to 1.2A max. In the ADJ position current is set by R16.

4.3 Test Point Descriptions

The test points are described in the following paragraphs.
. Default Shorting jumper setting is Low.
ILIM
4.3.1 TP1 – AD_EN
This push-pull driver for the external PFET connects the Adapter and the Output from the bq51013.
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Connector and Test Point Descriptions
4.3.2 TP2 – AC Input 2
This is the test point for measuring ac voltage applied to the EVM from the receiver coil.
4.3.3 TP3 – Com2 Communication 2 Drive
Communication driver signal, open-drain output connected to communication capacitor.
4.3.4 TP4 – AC Input 1
This is the test point for measuring ac voltage applied to the EVM from the receiver coil.
4.3.5 TP5 – CLMP 1
Overvoltage clamp driver signal, open-drain output is connected to OVP capacitor.
4.3.6 TP6 – CLMP 2
Overvoltage clamp drive signal, open-drain output is connected to OVP capacitor.
4.3.7 TP7 – OUT Output Voltage
This test point is the output voltage from the bq51013 or the Adapter input.
4.3.8 TP8 – Boot-1 Boot Capacitor
This bootstrap capacitor 1 drive connects to the integrated circuit (IC).
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4.3.9 TP9 – Boot-2 Boot Capacitor
This bootstrap capacitor 2 drive connects to the IC.
4.3.10 TP10 – CHG Charge
This output signal indicates that the output current is being delivered to OUT, the open-drain output.
4.3.11 TP11 – AC1 IC input
This is the ac input to the IC from series capacitors.
4.3.12 TP12 – Rectified Voltage
The input ac voltage is rectified into unregulated dc voltage; additional capacitance is used to filter the voltage before the regulator.
4.3.13 TP13, TP14, TP15 – GND
These are the ground test points.
4.3.14 TP16 – TS Temp Sensor
This is the connection point for external thermistor; see the data sheet for additional information.
4.3.15 TP17 – FOD
Input for rectified power measurment, pin 14 of the IC.
4.3.16 TP18– ILIM
Programming pin for over current limit, pin 12 of the IC.
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1
1
1
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5 Schematic and Bill of Materials

Schematic and Bill of Materials
NOTE: For Reference Only, See Table 2 for Specific Values
Figure 1. HPA765AEVM Schematic
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Test Setup
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Table 2. Bill of Materials
COUNT RefDes Value DESCRIPTION SIZE Part Number MFR
1 U1 bq51013ARHL IC, bq51013A Wireless Power Receiver QFN-20 bq51013ARHL TI 1 Q1 CSD75205W1015 MOSFET, Dual PChan, -20V, 1.2A, CSP CSD75205W1015 TI
2 C1, C2 68nF Capacitor, Ceramic, 50V, X7R, 10% 0603 Std Std 1 C3 47nF Capacitor, Ceramic, 50V, X7R, 10% 0603 Std Std 1 C4 1800pF Capacitor, Ceramic, 50V, X7R, 10% 0603 Std Std 1 C5 100pF Capacitor, Ceramic, 50V, X7R, 10% 0603 Std Std 4 C6, C16, C18, 0.1uF Capacitor, Ceramic, 50V, X7R, 10% 0603 Std Std
C19 2 C7, C17 1.0uF Capacitor, Ceramic, 25V, X5R, 10% 0603 Std Std 2 C8, C13 22nF Capacitor, Ceramic, 50V, X7R, 10% 0603 Std Std 2 C9, C12 0.47uF Capacitor, Ceramic, 25V, X5R, 10% 0603 Std Std 2 C10, C11 0.01uF Capacitor, Ceramic, 50V, X7R, 10% 0603 Std Std 2 C14, C15 10uF Capacitor, Ceramic, 25V, X5R, 10% 1206 Std Std 1 C20 1.0uF Capacitor, Ceramic, 50V, X5R, 10% 0805 Std Std 1 D1 LTST-C190GKT Diode, LED, Green, 2.1-V, 20-mA, 6-mcd 0603 LTST-C190GKT LiteOn 1 D2 5.1V Diode, Zener, 5.1V, 300mW SOD-523 BZT52C5V1T Diodes, Inc. 0 R1, R5, R14 Open Resistor,Chip, 1/16W, 1% 0603 STD STD 1 R2 140 Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R3 200k Potentiometer, 1/4 in. Cermet, 12-Turn, 0.25x0.17 3266W-1-204LF Bourns
1 R4 110 Resistor, Chip, 1/16W, 1% 0603 Std Std 0 R6, R12 Open Resistor, Metal Film, 1/4 watt, ± 1% 1206 CRCW120624R0FKEA Vishay 1 R7 1.50K Resistor, Chip, 1/16W, 1% 0603 Std Std 2 R8, R9 200 Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R10 499 Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R11 10.0k Resistor, Chip, 1/16W, 1% 0603 Std Std 1 R15 110K Resistor, Chip, 1/16W, 1% 0603 Std Std 0 R13 Open Potentiometer, 1/4 in. Cermet, 12-Turn, 0.25x0.17 3266W-1-203LF Bourns
1 R16 5k Potentiometer, 1/4 in. Cermet, 12-Turn, 0.25x0.17 3266W-1-502LF Bourns
1 Coil, RX with Attractor IWAS-4832FF-50 or Vishay or
190 milliOhm 1x1.5mm
Top-Adjust
Top-Adjust
Top-Adjust
WR-483250-15M2-G or TDK or 760308201 Wurth

6 Test Setup

6.1 Equipment

6.1.1 bqTESLA™ Transmitter
Power for the bq51013AEVM-765 receiver EVM is supplied through a bqTESLA™ transmitter (bq500210EVM-689) or WPC-certified transmitter. The input ac voltage is applied to the receiver through the coil located in the receiver bottom.
6.1.2 Voltage Source
Input power supply to the bqTESLA™ transmitter(bq500210EVM-689) is typically 19 Vdc ±200 mV at 500 mA maximum, but consult transmitter specification. To simulate an external adapter, an additional 5 V at the 1-A power supply is used.
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+
-
V
Wireless Transmitter
V
A
A
R
L
L
P
L
S
AC1
OUT-J3
V
I
VRECT-TP12
AC2
GND-J4
OUT-TP7
Wireless Receiver bq51013AEVM-765
+
-
GND-J2V-adapter-J1
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6.1.3 Meters
Output voltage can be monitored at TP7 with a voltmeter. Input current into the load must be monitored with an appropriate ammeter. Transmitter input current and voltage can be monitored also but the meter must use averaging function for reducing error due to communications packets.
6.1.4 Loads
A single load is required for 5 V with a maximum current of 1 A. The load can be resistive or electronic.
6.1.5 Oscilloscope
A multichannel oscilloscope with appropriate probes is used to observe the RECT voltage at TP12 and other signals.
6.1.6 Recommended Wire Gauge
For proper operation, 22 AWG wire is recommended when connecting the bq51013AEVM-765EVM to loads.

6.2 Equipment Setup

• With the power supply off, connect supply to the bqTESLA™ transmitter.
• Place the bqTESLA™ receiver on the transmitter.
• Connect load to J3 with return to J4, monitor current through load with ammeter, and monitor current to load at TP7.
• Typical output voltage is 5 V, and the output current range is 0 mA to 1 A.
Test Setup
6.2.1 Equipment Setup Diagram
The diagram of Figure 2 shows the equipment test setup.
Figure 2. Equipment Setup
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