Texas Instruments Bq50002 User manual

User's Guide

SLVUAJ7–October 2015

bq50002 Wireless Power TX EVM

The bqTESLA™ wireless power transmitter evaluation module from Texas Instruments is a high-

performance, easy-to-use development module for the design of wireless power solutions. The bq50002

evaluation module (EVM) provides all the basic functions of a Qi-compliant, wireless charger pad. The 5-V

input, single coil transmitter enables designers to speed the development of their end-applications. The

EVM supports both the Qi WPC 1.0, WPC 1.1, and WPC 1.2 receivers and will support output power up to

5 W.

Contents

1 Applications................................................................................................................... 2

2 bq50002EVM-607 Electrical Performance Specifications.............................................................. 2

3 Modifications.................................................................................................................. 3

4 Connector and Test Point Descriptions................................................................................... 3

4.1 Input/Output Connections.......................................................................................... 3

4.2 Test Point Descriptions ............................................................................................ 4

5 Schematic and Bill of Materials ............................................................................................ 8

6 Test Setup................................................................................................................... 11

6.1 Equipment.......................................................................................................... 11

6.2 Equipment Setup.................................................................................................. 12

6.3 EVM Procedure.................................................................................................... 13

7 bq50002EVM-607 Assembly Drawings and Layout ................................................................... 18

8 Reference ................................................................................................................... 20

List of Figures

1 bq50002EVM-607 Schematic .............................................................................................. 8

2 Connections of the EV2400 kit ........................................................................................... 13

3 bqStudio Window........................................................................................................... 14

4 Device ID.................................................................................................................... 14

5 Efficiency vs Power, bq50002EVM-607 TX and bq51013BEVM-764 Receiver.................................... 16

6 Start Up...................................................................................................................... 16

7 Thermal Performance...................................................................................................... 17

8 Assembly Top............................................................................................................... 18

9 Inner Layer 1................................................................................................................ 19

10 Inner Layer 2................................................................................................................ 19

11 Bottom Layer................................................................................................................ 20

List of Tables

1 bq50002EVM-607 Electrical Performance Specifications.............................................................. 2

2 Bill of Materials............................................................................................................... 9

bqTESLA is a trademark of Texas Instruments.

Avid is a registered trademark of Avid Technology, Inc..

SLVUAJ7–October 2015 bq50002 Wireless Power TX EVM

Applications

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1 Applications

The bq50002EVM-607 evaluation module demonstrates the transmitter portion of the bqTESLA™ wireless

power system. This transmitter EVM is a complete transmitter-side solution that powers a bqTESLA

receiver. The EVM requires a single 5-V power supply capable of up to 2.0 A to operate and combines the

transmitter electronics, input power circuit, LED indicators, and the transmitting coil on the single printed-

circuit board (PCB). The open design allows easy access to key points of the electrical schematic.

This EVM has the following features:

• Qi-Certified WPC 1.2 solution for 5-W operation

• 5-V input and fixed operation voltage

• Enhanced Foreign Object Detection (FOD)

• WPC 1.2 FOD

• Transmitter-coil mounting pad providing the correct receiver interface

• Highly-integrated analog front end including LDO, FETs, drivers, current sense amplifier, and de-

modulation circuit

• Standard WPC A11-type transmitter coil with no magnet

• LED and audio indication of power transfer

2 bq50002EVM-607 Electrical Performance Specifications

Table 1 provides a summary of the EVM performance specifications. All specifications are given for an

ambient temperature of 25°C.

Table 1. bq50002EVM-607 Electrical Performance Specifications

Parameter Notes and Conditions Min Typ Max Unit

Input Characteristics

VIN Input voltage 4.5 5 5.5 V

IIN Input current VIN = Nom, IOUT = 1 A at 5 V 1.4 A

Input no-load current VIN = Nom, IOUT = 0 A 165 mA

Input stand-by current VIN = Nom 4 mA

Output Characteristics – Receiver bq51013BEVM-764

VOUT Output voltage VIN = Nom, IOUT = 1 A , VOUT = 5 V 4.95 5.00 5.04 V

Output ripple VIN = Nom, IOUT = 1.0 A, VOUT = 5 V 200 mVPP

IOUT VIN = Min to Max VIN = Min to Max, VOUT = 5 V 0 1.5 A

Systems Characteristics

FSSwitching frequency During power transfer 110 205 kHz

ηpk Peak efficiency VIN = Nom, P Out RX = 3 W 74 %

ηFull-load efficiency VIN = Nom, IOUT = Max 71 %

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Modifications

3 Modifications

See the datasheet (SLUSBW1) when changing components.

FOD – R27 threshold and R26 FOD_Cal (see Section 6.3.9)

4 Connector and Test Point Descriptions

4.1 Input/Output Connections

The connection points are described in Section 4.1.1 through Section 4.1.4.

4.1.1 J1 – VIN

Input power 5 V ±500 mV, return at J3.

4.1.2 J2 – USB Input

USB input connection.

4.1.3 J3 –GND

Return for input power, input at J1.

4.1.4 J4 – Serial Interface

I2C interface connection to communicate with the IC. Used with bqStudio tool to monitor behavior

SLVUAJ7–October 2015 bq50002 Wireless Power TX EVM

Connector and Test Point Descriptions

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4.2 Test Point Descriptions

The test points are described in Section 4.2.1 through Section 4.2.56.

4.2.1 TP1 – CS+

Current sense amplifier positive input.

4.2.2 TP2 – CS–

Current sense amplifier negative input.

4.2.3 TP3 – VIN

Input power, 5 V ±500 mV.

4.2.4 TP4 – GND

Return for input power.

4.2.5 TP5 –DMIN1

Modulation signal input from coil for DEMOD Channel 1.

4.2.6 TP6 –SW1

Switch node of the half bridge MOSFETs.

4.2.7 TP7 – GND

Low-noise ground test point (TP).

4.2.8 TP8 –Low-Noise Analog Ground

Low-noise ground TP.

4.2.9 TP9 – GND

Low-noise ground TP.

4.2.10 TP10 – GND

Low-noise ground TP.

4.2.11 TP11 – PGND

Return for SW1.

4.2.12 TP12 – DMIN2

Modulation signal input from coil for DEMOD Channel 2.

4.2.13 TP13 – PEAK

Peak detection.

4.2.14 TP14 – SW2

Switch node of the half-bridge MOSFETs.

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Connector and Test Point Descriptions

4.2.15 TP15 – BP3

Output of 3-V LDO.

4.2.16 TP16 – TANK

Coil signal at junction between transmitter coil and resonant capacitors.

4.2.17 TP17 – PGND

Return for SW2.

4.2.18 TP18 – PWM1/CLK

Input to control half-bridge MOSFETs connected to SW1 when PWM_CTRL is high. The operating

frequency/pulse width changes up or down depending on every rising edge of this periodic signal when

PWM_CTRL is low.

4.2.19 TP19 – PWM2/UPDN

Input to control half-bridge MOSFETs connected to SW2 when PWM_CTRL is high. Increase or decrease

power transfer when PWM_CTRL is low.

4.2.20 TP20 – CSO

Output of the current sense amplifier.

4.2.21 TP21 – DMOUT1

Demodulated 2-kHz bit stream from demodulation channel 1.

4.2.22 TP22 – DMOUT2

Demodulated 2-kHz bit stream from demodulation channel 2.

4.2.23 TP23 – BUZZ

DC output when power transfer is started. Can be used to drive a DC style buzzer or LED. See data sheet

for more information.

4.2.24 TP24 – LED_B

Status indication, typically RED.

4.2.25 TP25 – LED_A

Status indication, typically GREEN.

4.2.26 TP26 – LED_C

Status indication, typically ORANGE.

4.2.27 TP27 – LED_MODE

LED mode selection.

4.2.28 TP28 – T_SENSE

Temperature sensing for safety shutdown.

SLVUAJ7–October 2015 bq50002 Wireless Power TX EVM

Connector and Test Point Descriptions

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4.2.29 TP29 – FOD_CAL

FOD calibration.

4.2.30 TP30 – FOD_THR

FOD threshold.

4.2.31 TP31 – V_SENSE

Input voltage sense.

4.2.32 TP32 – FLIM

Leave floating to conform to WPC specification 205-kHz maximum operating frequency.

4.2.33 TP33 – ILIM

ILIM can be used to restrict the input current in order to operate with a limited input voltage source. Leave

this pin open if no fixed current limit should be used.

4.2.34 TP34 – Reserved IC Pin 5

Unused.

4.2.35 TP35 – Unused IC Pin 7

Leave this pin open.

4.2.36 TP36 – Unused IC Pin 25

Leave this pin open.

4.2.37 TP37 – Unused IC Pin 27

Leave this pin open.

4.2.38 TP38 - Unused IC Pin 17

Leave this pin open.

4.2.39 TP39 - Unused IC Pin 6

Leave this pin open.

4.2.40 TP40 - Unused IC Pin 24

Leave this pin open.

4.2.41 TP41 - Unused IC Pin 26

Leave this pin open.

4.2.42 TP42 - Unused IC Pin 18

Leave this pin open.

4.2.43 TP43 – CLK_IN

CLK_OUT signal from the internal oscillator of the bq50002.

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Connector and Test Point Descriptions

4.2.44 TP44 – MODE

Control of frequency/pulse width of the internal generated oscillator signal.

4.2.45 TP45 – SDA

I2C data.

4.2.46 TP46 – SCL

I2C clock.

4.2.47 TP47 – 3-V Rail Resistor Divider

4.2.48 TP49 – Floating Test Point

4.2.49 TP50 – Floating Test Point

4.2.50 TP51 – GND

4.2.51 TP52 - Floating Test Point

4.2.52 TP53 - Floating Test Point

4.2.53 TP54 – GND

4.2.54 TP55 – Floating Test Point

4.2.55 TP56 – Floating Test Point

4.2.56 TP57 – GND

SLVUAJ7–October 2015 bq50002 Wireless Power TX EVM

2.00

R11

TP1

DNP

TP2

DNP

2.2µF

TP6

DNP

0.047µF

C10

0.1µF

22µF

0.2

PGND

0.1µF

C11

22µF

0.1µF

C14

0.1µF

TP14

DNP

0.1µF

C20

TP15

DNP

PWM1_/_CLK_IN

PWM_CTRL

BP3

GND

DMOUT 2

DMOUT 1

CLK_OUT

MODE

DMIN 1

DMIN 2

GND

PVIN2 14

PVIN2 15

BOOT2 16

SW2 17

SW2 18

SW2 19

PGND 20

PGND 21

PGND 22

SW1 23

SW1 24

BOOT1 25

SW1 26

PVIN1 27

PVIN1 28

CSN

CSP

CSO

PWM2_/_UP_DN

QFN_PAD

bq50002

0.047µF

C18

0.2

R16

PGND

0.022µF

C12

GND499k

R10

2700pF

C15

GNDGND

TP12

DNP

69.8k

TP5

DNP

1000pF

10.0k

GND

+5 VIN

TP3

1.00k

- N/C -

22µF

Green

TP4

NT1

Net-Tie

GND

PGNDGND

USB

0.02

R18

PGND

GND

1µF

GND GND

760308111

DNP

TP17

PGND

TP11

TP18

DNP

TP19

DNP

GND

0.47µF

C25

GND

0.1µF

C24

0.1µF

C22

GND

TP20

DNP 0.1µF

C23

GND

1.00k

R19

Green

TP25

DNP

1.00k

TP24

DNP

GND

1.00k

R17

TP26

DNP

Orange

10.0k

R28

TP23

DNP

BUZ1

TP34

DNP

TP39

DNP

TP35

DNP

TP37

DNP

TP41

DNP

TP36

DNP

TP40

DNP

GND

TP38

DNP

TP42

DNP

Red

PWM1_/_CLK_OUT 1

PWM2_/_UP_DN 2

ISENSE 3

ILIM

Reserved

Unused

VPEAK

VSENSE

FOD_CAL

LED_A 11

LED_B 12

TSENSE

LED_C 14

BUZZ 15

MODE 16

Unused

Reserved

CLK_IN 21

COMM1 22

COMM2 23

Unused

SDA

28 SCL

VCORE

DVSS 31

DVCC

FLIM

LED_MODE

FOD_THR

AVSS 36

DRV_EN 37

PWM_CTRL 38

AVSS 39

AVCC

QFN PAD 41

bq500511

TP22

DNP

TP21

DNP

GND

TANK

TP16

TANK

10.0k

R20

GND GNDGND GND

200k

R23

100k

R27

100k

R21

24.9k

R25

100k

R22

80.6k

R26

0.1µF

C27

TP30

DNP

TP27

DNP

TP29

DNP

TP28

DNP 76.8k

R13

10.0k

R14

0.1µF

C28

DNP

GND

TP31

DNP

1.) FOD-THR R23/R27--400mW

2.) LED R21/R25--Mode 1

3.) FOD_CAL R22/R26--72mW/A (1.339V)

VSENSE

FOD_CALTSENSELED MODE FOD THR

PEAK

VSENSE

FOD_CAL

LED MODE

FOD THR

TSENSE

10.0k

R24

10.0k

R12

VCC_3

JTAG

GND

910

1112

1314

1000pF

C26

47k

R15 GND

VCC_3

JTAG_DATA

JTAG_CLK

SCL

SDA

JTAG_CLK

JTAG_DATA

VCC_3 VCC_5

VCC_5

GND

TP13

DNP 2200pF

C13

113k

7.50k

PEAK

VCC_3

GND

SDA

SCL

22-05-3041 2.2µF

C21

GND

TP33

DNP

TP32

DNP

TP7 TP8 TP9 TP10

TP44

DNP

TP43

DNP

10.0k

R32 DNP

GND

10.0k

R33

DNP

TP47

DNP

TP50

DNP

10.0k

R31

DNP

VCC_3

GND

TP53

DNP

TP51

DNP

TP54

DNP

TP57

DNP

TP56

DNP

TP49

DNP

TP52

DNP

TP55

DNP

GND

TP45

DNP TP46

DNP

10.0k

R30

DNP

GND

10.0k

R29 DNP

VCC_3

GND

0.1µF

C16

0.1µF

C17

0.1µF

C19

10.0k ohm

t°

NTC1

Schematic and Bill of Materials

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5 Schematic and Bill of Materials

This section includes the schematics and bill of materials for the EVM.

Figure 1 illustrates the schematics for this EVM.

Figure 1. bq50002EVM-607 Schematic

8bq50002 Wireless Power TX EVM SLVUAJ7–October 2015

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Schematic and Bill of Materials

Table 2 contains the BOM for this EVM.

Table 2. Bill of Materials(1)

Designator Qty Value Description Package Reference Part Number Manufacturer Alternate Part Alternate

Number Manufacturer

!PCB1 1 Printed Circuit Board PWR607 Any - -

BUZ1 1 Buzzer, Piezo, 4kHz, 12.2mm, TH 12.2x4.0mm PS1240P02CT3 TDK

C1, C2 2 1uF CAP, CERM, 1 µF, 25 V, +/- 10%, X7R, 0603 0603 GRM188R71E105KA12D MuRata

C3 1 2.2uF CAP, CERM, 2.2 µF, 10 V, +/- 10%, X7R, 0603 0603 GRM188R71A225KE15D MuRata

C4, C6 2 22uF CAP, CERM, 22uF, 25V, +/-20%, X5R, 0805 0805 GRM21BR61E226ME44 MuRata

C5, C7, C11, C20, C22, C23, 8 0.1uF CAP, CERM, 0.1uF, 25V, +/-10%, X7R, 0603 0603 C1608X7R1E104K TDK

C24, C27

C8 1 22uF CAP, CERM, 22uF, 25V, +/-10%, X7R, 1210 1210 GRM32ER71E226KE15L MuRata

C9, C26 2 1000pF CAP, CERM, 1000pF, 50V, +/-5%, C0G/NP0, 0603 0603 C1608C0G1H102J TDK

C10, C18 2 0.047uF CAP, CERM, 0.047uF, 50V, +/-10%, X7R, 0603 0603 C1608X7R1H473K TDK

C12 1 0.022uF CAP, CERM, 0.022 µF, 50 V, +/- 10%, X7R, 0603 0603 C1608X7R1H223K TDK

C13 1 2200pF CAP, CERM, 2200 pF, 50 V, +/- 10%, X7R, 0603 0603 GRM188R71H222KA01D MuRata

C14, C16, C17, C19 4 0.1uF CAP, CERM, 0.1 µF, 25 V, +/- 5%, C0G/NP0, 1206 1206 C3216C0G1E104J TDK

C15 1 2700pF CAP, CERM, 2700pF, 50V, +/-5%, C0G/NP0, 0603 0603 C1608C0G1H272J TDK

C21 1 2.2uF CAP, CERM, 2.2uF, 16V, +/-10%, X5R, 0603 0603 GRM188R61C225KE15D MuRata

C25 1 0.47uF CAP, CERM, 0.47uF, 10V, +/-10%, X7R, 0603 0603 GRM188R71A474KA61D MuRata

D1, D6 2 Green LED, Green, SMD 1.6x0.8x0.8mm LTST-C190KGKT Lite-On

D2, D3 2 100V Diode, Switching, 100V, 0.2A, SOD-323 SOD-323 MMDL914-TP Micro Commercial

Components

D4 1 Orange LED, Orange, SMD 1.6x0.8x0.8mm LTST-C190KFKT Lite-On

D5 1 Red LED, Red, SMD Red LED, 1.6x0.8x0.8mm LTST-C190CKT Lite-On

H1 1 Cover, Plastic Polycarbonate, 2.75 " Square, 0.93 thick MCH002 Any - -

H2, H5, H8, H11 4 Standoff, Nylon, Female to Male, 4-40 x 1/4" 4-40 x 1/4" 4800 Keystone - -

H3, H6, H9, H12, H17, H20 6 Mounting Feet, 0.25" tall 2563 Voltrex

H4 1 Plate, aluminum 2.0"x2.0"x0.062" MCH003 Any - -

H7 1 Sil-Pad Cut to Size 2.0" Square See Assy Note ZZ5 GP1500-0.020-00-0816 Bergquist GP1500-0.020-00- Bergquist

0404

H10 1 Adhesive, Thermally Conductive Silicone See Assy Note ZZ6 SA-1000 Bergquist - -

H13, H15, H18, H21 4 Nut #4-40 Hex Nylon 4-40 NY HN 440 B&F Fastener - -

Supply

H14, H16, H19, H22 4 Screw, steel zinc, flathead 4-40 machine, 0.250" 4-40 x 1/4" Any Any - -

J1, J3 2 Header, 100mil, 2x1, Tin, TH Header, 2 PIN, 100mil, Tin PEC02SAAN Sullins Connector

Solutions

J2 1 Receptacle, Micro-USB-B, Right Angle, SMD Micro USB receptacle 105017-0001 Molex

J4 1 Header (friction lock), 100mil, 4x1, R/A, TH 4x1 R/A Header 22-05-3041 Molex

J5 1 Header (shrouded), 100 mil, 7x2, Gold plated, TH 7x2 Shrouded Header SBH11-PBPC-D07-ST-BK Sullins Connector

Solutions

L1 1 6.3uH Inductor, 6.3 µH, 13 A, 0.017 ohm, TH TH, Dia 53mm, Pin spacing 760308111 Wurth Elektronik

14.2mm

(1) Unless otherwise noted in the Alternate Part Number and/or Alternate Manufacturer columns, all parts may be substituted with equivalents.

SLVUAJ7–October 2015 bq50002 Wireless Power TX EVM

Schematic and Bill of Materials

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Table 2. Bill of Materials(1) (continued)

Designator Qty Value Description Package Reference Part Number Manufacturer Alternate Part Alternate

Number Manufacturer

NTC1 1 10.0k ohm Thermistor NTC, 10.0k ohm, 1%, 0603 0603 NTCG163JF103F TDK

R1 1 113k RES, 113 k, 0.1%, 0.1 W, 0603 0603 RG1608P-1133-B-T5 Susumu Co Ltd

R2 1 7.50k RES, 7.50 k, 0.1%, 0.1 W, 0603 0603 RT0603BRD077K5L Yageo America

R3, R5 2 0 RES, 0 ohm, 5%, 0.25W, 1206 1206 CRCW12060000Z0EA Vishay-Dale

R4, R9, R17, R19 4 1.00k RES, 1.00 k, 1%, 0.1 W, 0603 0603 CRCW06031K00FKEA Vishay-Dale

R6 1 69.8k RES, 69.8k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0769K8L Yageo America

R7, R12, R20, R24, R28 5 10.0k RES, 10.0k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0710KL Yageo America

R8, R16 2 0.2 RES, 0.2 ohm, 5%, 0.25W, 0805 0805 ERJ-S6SJR20V Panasonic

R10 1 499k RES, 499k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07499KL Yageo America

R11 1 2.00 RES, 2.00, 1%, 0.1 W, 0603 0603 CRCW06032R00FKEA Vishay-Dale

R13 1 76.8k RES, 76.8 k, 0.1%, 0.1 W, 0603 0603 RG1608P-7682-B-T5 Susumu Co Ltd

R14 1 10.0k RES, 10.0 k, 0.1%, 0.1 W, 0603 0603 RT0603BRD0710KL Yageo America

R15 1 47k RES, 47k ohm, 5%, 0.1W, 0603 0603 RC0603JR-0747KL Yageo America

R18 1 0.02 RES, 0.02, 0.5%, 0.5 W, 1206 sense 1206 sense LVK12R020DER Ohmite

R21, R22, R27 3 100k RES, 100 k, 1%, 0.1 W, 0603 0603 RC0603FR-07100KL Yageo America

R23 1 200k RES, 200 k, 1%, 0.1 W, 0603 0603 RC0603FR-07200KL Yageo America

R25 1 24.9k RES, 24.9 k, 1%, 0.1 W, 0603 0603 RC0603FR-0724K9L Yageo America

R26 1 80.6k RES, 80.6 k, 1%, 0.1 W, 0603 0603 RC0603FR-0780K6L Yageo America

TP3 1 Red Test Point, Compact, Red, TH Red Compact Testpoint 5005 Keystone

TP4, TP7, TP8, TP9, TP10, 7 Black Test Point, Multipurpose, Black, TH Black Multipurpose 5011 Keystone

TP11, TP17 Testpoint

TP16 1 White Test Point, Compact, White, TH White Compact Testpoint 5007 Keystone

U1 1 BQ500511RHA, RHA0040A RHA0040A bq500511 Texas Instruments BQ500511RHAT Texas Instruments

U2 1 4.2V to 5.5V Input, 3A Full Bridge, 2 Channel Analog RHB0032E bq50002 Texas Instruments None

Demodulation Wireless Power TX-Driver for Wireless

Charging Applications, RHB0032E

C28 0 0.1uF CAP, CERM, 0.1uF, 25V, +/-10%, X7R, 0603 0603 C1608X7R1E104K TDK

FID1, FID2, FID3 0 Fiducial mark. There is nothing to buy or mount. Fiducial N/A N/A

L2 0 Coupled inductor, 2.5 A, 0.034 ohm, SMD SMD, 5x5mm DLW5BTM102TQ2K MuRata

R29, R30, R31, R32, R33 0 10.0k RES, 10.0k ohm, 1%, 0.1W, 0603 0603 RC0603FR-0710KL Yageo America

TP49, TP52, TP55 0 White Test Point, Miniature, White, TH White Miniature Testpoint 5002 Keystone

TP51, TP54, TP57 0 Black Test Point, Multipurpose, Black, TH Black Multipurpose 5011 Keystone

Testpoint

10 bq50002 Wireless Power TX EVM SLVUAJ7–October 2015

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