Texas Instruments bqTESLA User manual

1
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bq501210 bqTESLA™ Wireless Power TX EVM
bqTESLA is a trademark of Texas Instruments.
Avid is a registered trademark of Avid Technology, Inc..
User's Guide
SLVUAO6–June 2016
bq501210 bqTESLA™ Wireless Power TX EVM
The bq501210EVM-756 wireless power transmitter evaluation module from TI is a high-performance,
easy-to-use development module for the design of wireless power solutions. The bq501210 evaluation
module (EVM) provides all the basic functions of a Qi-compliant, wireless charger pad. The 15-V to 19-V
input, single coil transmitter (TX) enables designers to speed the development of their end-applications.
The EVM supports WPC v1.0, WPC v1.1, and WPC v1.2 receivers (RX) and supports output power up to
15 W when paired with a WPC v1.2 15-W receiver.
Contents
1 Applications................................................................................................................... 2
2 bq501210EVM-756 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 ............................................................................................ 6
6 Test Setup................................................................................................................... 14
6.1 Equipment.......................................................................................................... 14
6.2 Equipment Setup.................................................................................................. 15
7 bq501210EVM-756 Assembly Drawings and Layout.................................................................. 21
8 Reference ................................................................................................................... 24
List of Figures
1 bq501210EVM-756 Full Schematic ....................................................................................... 6
2 bq501210EVM-756 Transmitter Manager Schematic................................................................... 7
3 bq501210EVM-756 Current Sense Schematic ......................................................................... 8
4 bq501210EVM-756 Coil Control Schematic.............................................................................. 9
5 bq501210EVM-756 Power Schematic................................................................................... 10
6 bq501210EVM-756 Schematic........................................................................................... 11
7 Equipment Setup........................................................................................................... 15
8 EVM Test Points ........................................................................................................... 16
9 Analog and Digital Pings with No RX.................................................................................... 16
10 Efficiency vs Power, bq501210EVM-756 Transmitter and a 15-W Receiver....................................... 17
11 Start Up...................................................................................................................... 18
12 TX_COMM at Start Up .................................................................................................... 18
13 Thermal Performance...................................................................................................... 20
14 Sense Resistor Layout .................................................................................................... 21
15 Assembly Top............................................................................................................... 22
16 Top Silk...................................................................................................................... 22
17 Top Layer ................................................................................................................... 23
18 Inner Layer 1................................................................................................................ 23
19 Inner Layer 2................................................................................................................ 24
20 Bottom Layer................................................................................................................ 24

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List of Tables
1 bq501210EVM-756 Electrical Performance Specifications ............................................................ 2
2 Bill of Materials ............................................................................................................. 12
1 Applications
The bq501210EVM-756 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 15-V to 19-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 EVM is a non-space optimized, open design allowing
easy access to key points of the electrical schematic.
This EVM has the following features:
• Qi-Certified WPC v1.2 for 15-W operation with a WPC v1.2 15-W receiver
• 5-W solution for WPC v1.1 or v1.2 Baseline Power Profile (BPP) receivers
• 15-V to 19-V input and fixed operating frequency for full 15-W results
• 12-V input for reduced power (> 10 W) solutions
• Enhanced Foreign Object Detection (FOD) with FOD ping detecting objects prior to power transfer
• WPC v1.2 FOD, WPC v1.1 FOD, and WPC v1.0 Parasitic Metal Object Detection (PMOD)
• Transmitter-coil mounting pad providing the correct receiver interface
• Compact power section design using the bq500101 NexFET power stage
• High-accuracy current sense design using the bq500100 current monitor
• WPC MP-A5 type transmitter coil
• LED and audio indication of power transfer
2 bq501210EVM-756 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. bq501210EVM-756 Electrical Performance Specifications
Parameter Notes and Conditions Min Typ Max Unit
Input Characteristics
VIN Input voltage POUT up to 15 W 15 19 VPOUT up to 10 W 12 19
POUT up to 4.5 W 4.5 5.0 19
IIN Input current VIN = Nom, IOUT = 1.5 A at 10 V 2.0 A
Input no-load current VIN = Nom, IOUT = 0 A 90 mA
Input stand-by current VIN = Nom 4 mA
Output Characteristics – WPC v1.2 10-V Nominal Output Receiver
VOUT Output voltage VIN = Nom, IOUT = 1.5A , VOUT = 10 V 9.7 10.0 10.3 V
IOUT VIN = Min to Max VIN = Min to Max, VOUT = 10 V 0 1.5 A
Systems Characteristics
fSW Switching frequency
during power transfer
VIN at startup > 6 V 130
kHz
VIN at startup < 6 V 110
VIN at startup < 6 V followed by HVDCP change from 5 V to
9 V or 12 V 130
ηpk Peak efficiency VIN = Nom, P Out RX = 13.0 W 84 %
ηFull-load efficiency VIN = Nom, IOUT = Max 84 %

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3 Modifications
See the bq501210 data sheet (SLUSCF5) when changing components:
•Use LED Mode – (Resistor R9) to change the behavior of the status LEDs D6, D7, and D8. The
standard value is 42.2 kΩfor control option 1, see the data sheet for additional settings.
•NTC – Connector JP3 provides the option for connecting a negative temperature coefficient (NTC)
sensor for thermal protection, see the data sheet for additional settings.
•FOD – R8 threshold and R49 FOD_Cal (see Section 6.2.2.7)
•FOD_Ping – R47 and R48 (see Section 6.2.2.7)
•PMOD – R16 threshold and disable (see Section 6.2.2.7)
4 Connector and Test Point Descriptions
4.1 Input/Output Connections
The connection points are described in Section 4.1.1 through Section 4.1.9.
4.1.1 J1 – VIN
Input power 12 V to 19 V, return at J2. 15 V to 19 V recommended for full 15-W delivery.
4.1.2 J2 – GND
Return for input power, input at J1.
4.1.3 J3 – JTAG
Factory use only, not populated.
4.1.4 J4 – Serial Interface
I2C interface connection to communicate with the device. Used with bqTESLA TX Tuning Tool to monitor
behavior.
4.1.5 J5 – Micro-USB
Micro-USB input used for HVDCP testing.
4.1.6 JP1 – FOD / PMOD Enable
Shorting jumper must be installed to enable FOD and PMOD functions. See the data sheet for additional
details. Default - Shorted.
4.1.7 JP2 – LED Mode
External connection for LED MODE resistor, if R9 is removed. When shorted, the device disables the LED
and inhibits low-power mode. This is useful for troubleshooting. Default - Open.
4.1.8 JP3 – NTC
The connection point for the external temperature sensor. See the data sheet for more information.
Default - Open.
4.1.9 JP4 – Input Selection
Shunt selects 19-V input (J1) or micro-USB input (J5). Default position is J1 for 19-V input.

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4.2 Test Point Descriptions
The test points are described in Section 4.2.1 through Section 4.2.25.
4.2.1 TP1 – FP_GAIN
FOD ping calibration gain setting, see the data sheet for more information.
4.2.2 TP2 – Drive A
Output from power section A of H-Bridge, U2.
4.2.3 TP3 – Coil Monitor L / C
Coil signal at junction between transmitter coil and resonant capacitors.
4.2.4 TP4 – Low Noise Analog Ground
Low noise ground test point (TP).
4.2.5 TP5 – Low Noise Analog Ground
Low noise ground TP.
4.2.6 TP6 – PEAK_DET
Peak detect circuit - input to PEAK_DET of bq501210.
4.2.7 TP7 – Demodulation Comm + Output
Primary communications channel, input to COMM_A+, COMM_B+, and COMM_C+ of bq501210, U1 from
demodulation circuit.
4.2.8 TP8 – I_Sense
Input current-sense voltage, scale 1 V = 1 A.
4.2.9 TP9 – RAIL+
Sample voltage from rail converter output, input to bq501210 rail control circuit.
4.2.10 TP10 – Proprietary Packet
RX_PROP indicates RX proprietary packet received.
4.2.11 TP11 – V33FB
Reserved, leave this pin open.
4.2.12 TP12 – Low Noise Analog Ground
Low noise ground TP.
4.2.13 TP13 – Debug only
TX_COMM is used for debug only. This pin echoes all TX_COMM.
4.2.14 TP14 – FP_OFFSET
FOD ping circuit setting, see the data sheet for more information.

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4.2.15 TP15 – Drive B
Output from power section B of H-Bridge, U3.
4.2.16 TP16 – FOD_Cal
FOD calibration resistor test point, connected to pin 22 of bq501210.
4.2.17 TP17 – Low Noise Analog Ground
Low noise ground TP.
4.2.18 TP18 – Rail Output Voltage
Output voltage from rail buck converter that feeds H-Bridge power section.
4.2.19 TP19 – PWM_RAIL
Digital input to rail converter power section from bq501210. Signal is PWM, used to control rail voltage.
4.2.20 TP20 – DPWM-A Signal
Digital output signal from bq501210 to H-Bridge drive for U2.
4.2.21 TP21 – DPWM-B Signal
Digital output signal from bq501210 to H-Bridge drive for U3.
4.2.22 TP22 – BUZZ_DC
DC output when power transfer is started. Can be used to drive a DC style buzzer or LED. See the data
sheet for more information.
4.2.23 TP23 – Unused IC Pin 30
Unused pin.
4.2.24 TP24 – Unused IC Pin 29
Unused pin.
4.2.25 TP25 – Unused IC Pin 6
Unused pin.

VIN
VIN J1
10µF
C27
19 Vin WE-TPC Type
VIN 3V3 VGATE
BOOT 1
VIN
2
EN
3
SS
4VSENSE 5
COMP
6
7
PH 8
GND
U5
TPS54231D
19 Vin
1
2
3
JP4
300µH
L1
VUSB
1µF
C1
0.1µFC26
47µF
C2
0.1µF
C30
D1
40V, 0.5A
D4
40V, 0.5A
V_SENSE
10µF
C6
0.1µF
C25 WE-PD Type
0
R54
D-_LO 0.1µFC12
88.7k
R26
VDD
1
VDD
2
PGND 3
VSW 4
VIN 5
BOOT_R 6
BOOT 7
PWM
8
PAD 9
U1
BQ500101DPCR
10.0k
R1
475
R42 TP18
D+_HI
1
2
3
4
5
6
7
8
9
10
11
J5
10uH
L2
0.015
R28
42.2k
R35 76.8k
R37
0.01µF
C28
TP19
D+_LO
11.0k
R38 R44
PWM_RAIL
10.0
R7
10.0
R17
0.3
R40
TP4 TP5 TP12 TP17
2700pF
C32 C44
D2
Green
NT1
Net-Tie 3.16k
R4
1µF
C46
GND
47µF
C8
NT2
Net-Tie 130k
R2
J2
GND 3V3
TP9
1
4 5
2
6
3
U7
BQ500100DCK
RAIL+
10.0
R12
VGATE
0.01µF
C35
1
GND
OUT
3IN 2
NC 4 NC
5
U6
TLV70450DBVT
511k
R34
10.0k
R3
0.1µF
C33
1µF
C39
1
3
2
D11
30V
1.00k
R22
511k
R36
RAIL-
10.0
R13
TP8
PWR_UP 1.00Meg
R21
I_SENSE
4.7µF
C40
Q1
BSS138
0.1µF
C41
2.2µF
C17
1.00Meg
R41
10.0k
R33
SNOOZE
VGATE VGATE
0.1µFC15
47µF
C24
0.1µFC29
47µF
C31
C42C43
1µF
C9
1µF
C13
VDD
1
VDD
2
PGND 3
VSW 4
VIN 5
BOOT_R 6
BOOT 7
PWM
8
PAD 9
U2
BQ500101DPCR
VDD 1
VDD 2
PGND
3
VSW
4
VIN
5
BOOT_R
6
BOOT
7
PWM 8
PAD
9
U3
BQ500101DPCR
TP2 TP3 TP15
0.1µFC10
L3
760308141
TP21
DPWM-B
TP20
DPWM-A 0.1µFC19
4700pF
C18
0.047µFC16
C11
3V3
0.1µF
C45
200k
R6
23.2k
R14
TP7
COMM+
10.0
R29
1
3
2
D10
30V
33pF
C14
10.0k
R5
COMM- 10.0
R19
1
3
2
D3
30V
3V3
TP6
PEAK_DET
10.0
R20
4.7µF
C3
0.1µF
C7
1µF
C34
22
R46
330pF
C37
CAL_INPUT
1.00Meg
R18
1µF
C21
4.7µF
C5
DPWM-A
CAL
1µF
C36 JP1
DPWM-B
PWM_RAIL
VIN
1µF
C20 TP16
100k
R39 154kR49
TP11
100kR8
PWR_UP 100kR16
3V3
COMM+
1 2 3 4 5 6 7 8 9
R27
TP1
LED-A
4700pF
C23
10.0k
R30
FP_GAIN 86.6kR47
COMM-
3V3
LED-B TP14
FP_OFFSET 86.6kR48
JTAG
10.0k
R23
LED-C
LS1
PS1240P02CT3
For Development Only
RemovePin 6 for Polarity
V_SENSE TP22
0.1µF
C38
10.0k
R45
RAIL+
SNOOZE
JP3 RAIL-
FP_GAIN
76.8k
R10
TCK
PEAK_DET
1
RESERVED
2
V_IN
3
T_SENSE
4
I_SENSE
5UNUSED 6
V33DIO
7
DGND 8
RESET
9
RESERVED
10
LED-A 12
LED-B 13
SNOOZE 14
CLK
15
DATA
16
PWM-A 17
PWM-B 18
FP_GAIN 19
FP_OFFSET 20
PWM_RAIL 21
FOD_CAL 22
FOD 23
PMOD 24
LED-C 25
DGND 26
RESERVED
27
RESERVED
28
UNUSED 29
UNUSED 30
BUZZ_AC 31
BUZZ_DC 32
TX_COMM 33
D-LO 11
DPING_DISABLE 34
D+LO 35
RESERVED
36
RESERVED
37
RESERVED
38
RESERVED
39
RESERVED
40
RX_PROP 41
D+HI 42
DGND 43
V33DIO
44
V33D
45
V33A
46
BPCAP
47
AGND2 48
AGND 49
COMM_A+
50
COMM_A-
51
COMM_B+
52
COMM_B-
53
V_RAIL+
54
V_RAIL-
55
COMM_C+
56
COMM_C-
57
V33FB
58
RESERVED 59
CAL_INPUT
60
LED_MODE
61
PWR_UP
62
V_SENSE
63
AGND3 64
PAD 65
U4
BQ501210RGCR
RET_CLK
FP_OFFSET
TDO
12
34
56
78
910
1112
1314
J3
TP13
TDI
PM_CLK
TMS
4700pF
C4
10.0k
R11
PM_DATA
D-_LO
LED
/TRST
D+_HI
JP2
10.0k
R24
D+_LO
CAL_INPUT
3V3
LED-A
TP25
42.2k
R9
I_SENSE TP24
PMBus
10.0k
R25
LED-B
3V3
TP23
PEAK_DET
LED-C
TP10
10.0k
R52
0.1µF
C22
12
34
56
78
910
J4
475
R15
475
R31
475
R32
10.0k
R51
RET_CLK
PM_DATA
ALERT
CTRL
TCK
PM_CLK
TDO
D6
Green
D7
Super Red
D8
Yellow
TDI
TMS
/TRST
10.0k
R43
STATUS
POWER
Current Sense
Coil Control
JTAG and I2C Communication – EVM Only
bq501210 Transmitter Manager
2
3
1A
V+
V-
4
11
U8AVIN
R50
21.5k
R56
3V3
5
6
7
BV+
V-
4
11
U8B
604
R53
1.00k
R58
2
4
1
5
3
U9
SN74AHC1G08DRL R
D9
Green
8
10
9
CV+
V-
4
11
U8C
1.00k
R59
14
12
13
DV+
V-
4
11
U8D
D5
Green
1.20k
R55
12.1k
R57
HVDCP-EVM Only
0.1µF
C47
1µF
C48
0.01µF
C49
0
R61
0
R60 3V3
EVM Only
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bq501210 bqTESLA™ Wireless Power TX EVM
5 Schematic and Bill of Materials
This section includes the schematics and bill of materials for the EVM.
Figure 1 through Figure 6 illustrate the schematics for this EVM.
Figure 1. bq501210EVM-756 Full Schematic

3V3
4.7µF
C3
0.1µF
C7
1µF
C34
22
R46
CAL_INPUT
1µF
C21
4.7µF
C5
DPWM-A
CAL
1µF
C36 JP1
DPWM-B
PWM_RAIL
VIN
1µF
C20 TP16
100k
R39 154kR49
TP11
100kR8
PWR_UP 100kR16
COMM+ TP1
LED-A
4700pF
C23
10.0k
R30
FP_GAIN 86.6kR47
COMM-
3V3
LED-B TP14
FP_OFFSET 86.6kR48
10.0k
R23
LED-C
LS1
PS1240P02CT3
V_SENSE TP22
0.1µF
C38
10.0k
R45
RAIL+
SNOOZE
JP3 RAIL-
FP_GAIN
76.8k
R10
PEAK_DET
1
RESERVED
2
V_IN
3
T_SENSE
4
I_SENSE
5UNUSED 6
V33DIO
7
DGND 8
RESET
9
RESERVED
10
LED-A 12
LED-B 13
SNOOZE 14
CLK
15
DATA
16
PWM-A 17
PWM-B 18
FP_GAIN 19
FP_OFFSET 20
PWM_RAIL 21
FOD_CAL 22
FOD 23
PMOD 24
LED-C 25
DGND 26
RESERVED
27
RESERVED
28
UNUSED 29
UNUSED 30
BUZZ_AC 31
BUZZ_DC 32
TX_COMM 33
D-LO 11
DPING_DISABLE 34
D+LO 35
RESERVED
36
RESERVED
37
RESERVED
38
RESERVED
39
RESERVED
40
RX_PROP 41
D+HI 42
DGND 43
V33DIO
44
V33D
45
V33A
46
BPCAP
47
AGND2 48
AGND 49
COMM_A+
50
COMM_A-
51
COMM_B+
52
COMM_B-
53
V_RAIL+
54
V_RAIL-
55
COMM_C+
56
COMM_C-
57
V33FB
58
RESERVED 59
CAL_INPUT
60
LED_MODE
61
PWR_UP
62
V_SENSE
63
AGND3 64
PAD 65
U4
BQ501210RGCR
FP_OFFSET
TP13
PM_CLK
4700pF
C4
10.0k
R11
PM_DATA
D-_LO
LED
D+_HI
JP2
10.0k
R24
D+_LO
CAL_INPUT
3V3
LED-A
TP25
42.2k
R9
I_SENSE TP24
10.0k
R25
LED-B
TP23
PEAK_DET
LED-C
TP10
0.1µF
C22
475
R15
475
R31
475
R32
RET_CLK
ALERT
CTRL
TCK
TDO
D6
Green
D7
Super Red
D8
Yellow
TDI
TMS
/TRST
10.0k
R43
STATUS
bq501210 Transmitter Manager
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Figure 2. bq501210EVM-756 Transmitter Manager Schematic

VIN
10µF
C27
VGATE
1µF
C1
V_SENSE
WE-PD Type
0.1µFC12
VDD
1
VDD
2
PGND 3
VSW 4
VIN 5
BOOT_R 6
BOOT 7
PWM
8
PAD 9
U1
BQ500101DPCR
TP18
10uH
L2
0.015
R28
TP19
R44
PWM_RAIL
10.0
R7
10.0
R17
0.3
R40
C44
1µF
C46
GND
47µF
C8
130k
R2
3V3
TP9
1
4 5
2
6
3
U7
BQ500100DCK
RAIL+
10.0
R12
0.01µF
C35
10.0k
R3
1.00k
R22
RAIL-
10.0
R13
TP8
I_SENSE
0.1µF
C41
Current Sense
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Figure 3. bq501210EVM-756 Current Sense Schematic

VGATE VGATE
0.1µFC15
47µF
C24
0.1µFC29
47µF
C31
C42C43
1µF
C9
1µF
C13
VDD
1
VDD
2
PGND 3
VSW 4
VIN 5
BOOT_R 6
BOOT 7
PWM
8
PAD 9
U2
BQ500101DPCR
VDD 1
VDD 2
PGND
3
VSW
4
VIN
5
BOOT_R
6
BOOT
7
PWM 8
PAD
9
U3
BQ500101DPCR
TP2 TP3 TP15
0.1µFC10
L3
760308141
TP21
DPWM-B
TP20
DPWM-A 0.1µFC19
4700pF
C18
0.047µFC16
C11
3V3
0.1µF
C45
200k
R6
23.2k
R14
TP7
COMM+
10.0
R29
1
3
2
D10
30V
33pF
C14
10.0k
R5
COMM- 10.0
R19
1
3
2
D3
30V
TP6
PEAK_DET
10.0
R20
330pF
C37
1.00Meg
R18
Coil Control
To VSW Pin
BQ500101DPCR
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Figure 4. bq501210EVM-756 Coil Control Schematic

VIN J1
19 Vin WE-TPC Type
VIN 3V3
BOOT 1
VIN
2
EN
3
SS
4VSENSE 5
COMP
6
7
PH 8
GND
U5
TPS54231D
19 Vin
1
2
3
JP4
300µH
L1
VUSB
0.1µFC26
47µF
C2
0.1µF
C30
D1
40V, 0.5A
D4
40V, 0.5A 10µF
C6
0.1µF
C25
D-_LO
88.7k
R26
10.0k
R1
475
R42
D+_HI
1
2
3
4
5
6
7
8
9
10
11
J5
42.2k
R35 76.8k
R37
0.01µF
C28
D+_LO
11.0k
R38
TP4 TP5 TP12 TP17
2700pF
C32
D2
Green
NT1
Net-Tie 3.16k
R4
NT2
Net-Tie
J2
GND
VGATE
1
GND
OUT
3IN 2
NC 4 NC
5
U6
TLV70450DBVT
511k
R34
0.1µF
C33
1µF
C39
1
3
2
D11
30V
511k
R36
PWR_UP 1.00Meg
R21
4.7µF
C40
Q1
BSS138
2.2µF
C17
1.00Meg
R41
10.0k
R33
SNOOZE
POWER
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Figure 5. bq501210EVM-756 Power Schematic

3V3
1 2 3 4 5 6 7 8 9
R27
JTAG
For Development Only
Remove Pin 6 for Polarity
TCK
RET_CLK
TDO
12
34
56
78
910
1112
1314
J3
TDI
TMS
/TRST
PMBus
3V3
10.0k
R52
12
34
56
78
910
J4
10.0k
R51
PM_DATA
PM_CLK
JTAG and I2C Communication – EVM Only
2
3
1A
V+
V-
4
11
U8AVIN
R50
21.5k
R56
3V3
5
6
7
BV+
V-
4
11
U8B
604
R53
1.00k
R58
2
4
1
5
3
U9
SN74AHC1G08DRLR
D9
Green
8
10
9
CV+
V-
4
11
U8C
1.00k
R59
14
12
13
DV+
V-
4
11
U8D
D5
Green
1.20k
R55
12.1k
R57
HVDCP-EVM Only
0.1µF
C47
1µF
C48
0.01µF
C49
0
R61
0
R60 3V3
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Figure 6. bq501210EVM-756 Schematic

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Table 2 contains the BOM for this EVM.
(1) Unless otherwise noted in the Alternate Part Number or Alternate MFR columns, all parts may be substituted with equivalents.
Table 2. Bill of Materials(1)
Designator Qty Value Description Package Reference Part Number Manufacturer
U1, U2, U3 3 Synchronous Buck NexFET Power Stage, DPC0008A DPC0008A BQ500101DPCR Texas Instruments
U4 1 WPC 1.2 Wireless Power Transmitter Manager with 15-W Power Deliver, RGC0064B RGC0064B BQ501210RGCR Texas Instruments
U5 1 Buck Step Down Regulator with 3.5 to 28 V Input and 0.8 to 25 V Output, -40 to 150°C, 8-Pin SOIC (D),
Green (RoHS & no Sb/Br) D0008A TPS54231D Texas Instruments
U6 1 Single Output LDO, 150 mA, Fixed 5 V Output, 2.5 to 24 V Input, with Ultra-Low IQ, 5-pin SOT-23 (DBV), -
40 to 125°C, Green (RoHS & no Sb/Br) DBV0005A TLV70450DBVT Texas Instruments
U7 1 BQ500100, DCK0006A DCK0006A BQ500100DCK Texas Instruments
L1 1 300uH Inductor, Shielded, 300uH, 0.13A, 4.1 ohm, SMD 4.8x1.8x4.8mm 744042331 Wurth Elektronik eiSos
L2 1 10uH Inductor, Shielded Drum Core, Ferrite, 10uH, 2.6A, 0.0515 ohm, SMD 10x3x10mm 7447713100 Wurth Elektronik eiSos
L3 1 10uH Inductor, Wirewound, 10uH, 9A, 0.028 ohm, TH 54.4x6.5x54.4mm 760308141 Wurth Elektronik eiSos
C1, C9, C13, C20, C21,
C34, C36, C39 8 1uF CAP, CERM, 1uF, 16V, +/-10%, X7R, 0603 0603 GRM188R71C105KA12D Murata
C2 1 47uF CAP, CERM, 47uF, 6.3V, +/-10%, X5R, 1206 1206 GRM31CR60J476KE19L Murata
C3, C5, C40 3 4.7uF CAP, CERM, 4.7uF, 10V, +/-10%, X5R, 0603 0603 CGB3B1X5R1A475K055AC TDK
C4, C18, C23 3 4700pF CAP, CERM, 4700pF, 50V, +/-10%, X7R, 0603 0603 GRM188R71H472KA01D Murata
C6, C27 2 10uF CAP, CERM, 10uF, 35V, +/-10%, X7R, 1210 1210 GRM32ER7YA106KA12L Murata
C7, C12, C15, C22, C25,
C26, C29, C30, C33,
C38, C41, C45
12 0.1uF CAP, CERM, 0.1uF, 50V, +/-10%, X7R, 0603 0603 GRM188R71H104KA93D Murata
C8 1 47uF CAP, CERM, 47 µF, 25 V, +/- 20%, X5R, 1206_190 1206_190 C3216X5R1E476M160AC TDK
C10, C19 2 0.1uF CAP, CERM, 0.1uF, 100V, +/-5%, C0G/NP0, 1812 1812 C1812C104J1GACTU Kemet
C14 1 33pF CAP, CERM, 33pF, 50V, +/-5%, C0G/NP0, 0603 0603 GRM1885C1H330JA01D Murata
C16 1 0.047uF CAP, CERM, 0.047uF, 100V, +/-5%, C0G/NP0, 1812 1812 C4532C0G2A473J200KA TDK
C17 1 2.2uF CAP, CERM, 2.2uF, 25V, +/-10%, X5R, 1206 1206 GRM316R61E225KA12D Murata
C24, C31 2 47uF CAP, CERM, 47uF, 25V, +/-20%, X5R, 1206 1206 C3216X5R1E476M160AC TDK
C28, C35 2 0.01uF CAP, CERM, 0.01uF, 50V, +/-10%, X7R, 0603 0603 GRM188R71H103KA01D Murata
C32 1 2700pF CAP, CERM, 2700pF, 50V, +/-5%, C0G/NP0, 0603 0603 GRM1885C1H272JA01D Murata
C37 1 330pF CAP, CERM, 330pF, 50V, +/-5%, C0G/NP0, 0603 0603 GRM1885C1H331JA01D Murata
C46 1 1uF CAP, CERM, 1 µF, 16 V, +/- 10%, X7R, 0603 0603 GRM188R71C105KA12D Murata
D1 1 40V, 0.5A Diode, Schottky, 40V, 0.5A, SOD-123 SOD-123 MBR0540T1G ON Semiconductor
D2, D6 2 Green LED, Green, SMD LED_0603 150060VS75000 Wurth Elektronik eiSos
D3, D10, D11 3 30V Diode, Schottky, 30V, 0.2A, SOT-323 SOT-323 BAT54SWT1G Fairchild Semiconductor
D7 1 Super Red LED, Super Red, SMD LED_0603 150060SS75000 Wurth Elektronik eiSos
D8 1 Yellow LED, Yellow, SMD LED_0603 150060YS75000 Wurth Elektronik eiSos
J5 1 Receptacle, Micro-USB-B, Right Angle, SMD Micro USB
receptacle 105017-0001 Molex
LS1 1 Buzzer, Piezo, 4kHz, 12.2mm, TH 12.2x4.0mm PS1240P02CT3 TDK
Q1 1 50V MOSFET, N-CH, 50V, 0.22A, SOT-23 SOT-23 BSS138 Fairchild Semiconductor

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Table 2. Bill of Materials(1) (continued)
Designator Qty Value Description Package Reference Part Number Manufacturer
R1, R3, R5, R11, R23,
R24, R25, R30, R33,
R43, R45
11 10.0k RES, 10.0k ohm, 1%, 0.1W, 0603 0603 CRCW060310K0FKEA Vishay-Dale
R2 1 130k RES, 130k ohm, 1%, 0.1W, 0603 0603 CRCW0603130KFKEA Vishay-Dale
R4 1 3.16k RES, 3.16k ohm, 1%, 0.1W, 0603 0603 CRCW06033K16FKEA Vishay-Dale
R6 1 200k RES, 200k ohm, 1%, 0.1W, 0603 0603 CRCW0603200KFKEA Vishay-Dale
R7, R17 2 10.0 RES, 10.0, 1%, 0.1 W, 0603 0603 CRCW060310R0FKEA Vishay-Dale
R8 1 100k RES, 100 k, 1%, 0.1 W, 0603 0603 CRCW0603100KFKEA Vishay-Dale
R9, R35 2 42.2k RES, 42.2 k, 1%, 0.1 W, 0603 0603 CRCW060342K2FKEA Vishay-Dale
R10, R37 2 76.8k RES, 76.8k ohm, 1%, 0.1W, 0603 0603 CRCW060376K8FKEA Vishay-Dale
R12, R13, R19, R20, R29 5 10.0 RES, 10.0 ohm, 1%, 0.1W, 0603 0603 CRCW060310R0FKEA Vishay-Dale
R14 1 23.2k RES, 23.2k ohm, 1%, 0.1W, 0603 0603 CRCW060323K2FKEA Vishay-Dale
R15, R31, R32, R42 4 475 RES, 475 ohm, 1%, 0.1W, 0603 0603 CRCW0603475RFKEA Vishay-Dale
R16 1 100k RES, 100k ohm, 1%, 0.1W, 0603 0603 CRCW0603100KFKEA Vishay-Dale
R18, R21, R41 3 1.00Meg RES, 1.00Meg ohm, 1%, 0.1W, 0603 0603 CRCW06031M00FKEA Vishay-Dale
R22 1 1.00k RES, 1.00k ohm, 1%, 0.1W, 0603 0603 CRCW06031K00FKEA Vishay-Dale
R26 1 88.7k RES, 88.7 k, 1%, 0.1 W, 0603 0603 CRCW060388K7FKEA Vishay-Dale
R28 1 0.015 RES, 0.015, 0.5%, 0.5 W, 1206 sense 1206 sense LVK12R015DER Ohmite
R34, R36 2 511k RES, 511 k, 1%, 0.1 W, 0603 0603 CRCW0603511KFKEA Vishay-Dale
R38 1 11.0k RES, 11.0 k, 1%, 0.1 W, 0603 0603 RC0603FR-0711KL Yageo America
R39 1 100k RES, 100 k, 1%, 0.1 W, 0603 0603 RC0603FR-07100KL Yageo America
R40 1 0.3 RES, 0.3, 1%, 0.5 W, 1206 1206 CSR1206FKR300 Stackpole Electronics Inc
R46 1 22 RES, 22 ohm, 0.5%, 0.1W, 0805 0805 RR1220Q-220-D Susumu Co Ltd
R47, R48 2 86.6k RES, 86.6 k, 1%, 0.1 W, 0603 0603 CRCW060386K6FKEA Vishay-Dale
R49 0 154k RES, 154 k, 1%, 0.1 W, 0603 0603 CRCW0603154KFKEA Vishay-Dale
R54 1 0 RES, 0, 5%, 0.1 W, 0603 0603 RC0603JR-070RL Yageo America
SH-JP1, SH-JP4 2 1x2 Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA 3M
TP2, TP3, TP15, TP18 4 White Test Point, Compact, White, TH White Compact
Testpoint 5007 Keystone
TP4, TP5, TP12, TP17 4 Black Test Point, Multipurpose, Black, TH Black Multipurpose
Testpoint 5011 Keystone

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6 Test Setup
6.1 Equipment
6.1.1 WPC v1.2 15-W Receiver
Use a WPC v1.2 15-W receiver for evaluation. When paired with the bq51025EVM-749, the system can
produce 10 W. If a low power Qi-compliant receiver such as bq51020EVM-520 or bq51013BEVM-764 is
used, then the maximum output power is 5 W. Note that the following test set-up only discusses the WPC
v1.2 15-W RX configuration.
6.1.2 Voltage Source
To deliver 15 W, the input voltage source must provide a regulated DC voltage of 15 V to 19 V and deliver
at least 2-A continuous load current; current limit must be set to 3 A.
CAUTION
To help assure safety integrity of the system and minimize risk of electrical
shock hazard, always use a power supply providing suitable isolation and
supplemental insulation (double insulated). Compliance to IEC 61010-1, Safety
Requirements for Electrical Equipment for Measurement, Control and
Laboratory Use, Part 1, General Requirements, or its equivalent is strongly
suggested, including any required regional regulatory compliance certification
approvals. Always select a power source that is suitably rated for use with this
EVM as referenced in this user manual.
External Power Supply Requirements:
Nom Voltage:15.0–19.0 VDC
Max Current: 2.0 A
Efficiency Level V
External Power Supply Regulatory Compliance Certifications: Recommend
selection and use of an external power supply which meets TI’s required
minimum electrical ratings in addition to complying with applicable regional
product regulatory/safety certification requirements such as (by example) UL,
CSA, VDE, CCC, PSE, and so forth.
The bq501210EVM-756 works with 5-V to 19-V input voltage. Levels between 15 V and 19 V will deliver
15 W, which is required for a WPC Extended Power Profile (EPP) transmitter.
5-V input supplies are aimed to negotiate to HVDCP voltages of 9 V or 12 V which enables Fast Charging
of capable receivers. The system may also deliver power as a normal 5-V transmitter, however, the power
level will be reduced and providing power to higher voltage receivers may not be successful. A typical 5-V
receiver has shown to produce 4.5 W consistently. Coupling and other factors will greatly influence the
results of each system.
6.1.3 Meters
Monitor the output voltage of the 15-W RX with a voltmeter. Monitor the input current into the load with an
appropriate ammeter. You can also monitor the transmitter input current and voltage, but the meter must
use the averaging function for reducing error, due to communications packets.
6.1.4 Loads
A single load is required at 7 V to 12 V (dependent on the RX used) with a maximum current of 2 A. The
load can be resistive or electronic.

+
±
Voltmeter
A
VVIN
J1 POS
J2 RTN
TP3 AC1
TP2 AC2
Wireless Transmitter
AC1
AC2
Output
Ground
Wireless Receiver
Rectifier
TX
Coil RX Coil
A
VRL
V A +
±
Ammeter Power Supply Oscilloscope
TP15 Drive B
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6.1.5 Oscilloscope
Use a dual-channel oscilloscope with appropriate probes to observe the VOUT of the 15-W RX and other
signals.
6.1.6 Recommended Wire Gauge
For proper operation, use 22-AWG wire when connecting the EVM to the input supply and the 15-W RX to
the load.
6.2 Equipment Setup
• Verify jumper positions
– JP1 - Shorted
– JP2 - Open
– JP3 - Open
– JP4 - 19-V input selected
• With the power supply OFF, connect the supply to the bq501210EVM-756 transmitter.
• Connect the VIN positive power source to J1, and connect the negative terminal of the VIN source to J2.
• Do not place the 15-W RX on the transmitter. Connect a load to OUT with a return to GND, monitor
current through the load with the ammeter, and monitor the voltage to the load at OUT. All voltmeters
must be Kelvin connected (at the pin) to the point of interest.
6.2.1 Equipment Setup Diagram
The diagram in Figure 7 shows the test setup.
Figure 7. Equipment Setup
6.2.2 EVM Procedures
This section provides guidance for a few general test procedures to exercise the functionality of the
presented hardware. Figure 8 shows the TX and RX test points.

IIN
Analog pings
Digital ping
Ping Response with No Receiver on Pad
Analog pings
TP15
Drive B
Drive B
TP15 AC1 TP3
AC2
TP2
15-W WPC v1.2
Receiver LOAD
Output
Ground
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Figure 8. EVM Test Points
Some key notes are shown in the following sub-sections.
6.2.2.1 Start-Up No Receiver
Turn on VIN, and observe that the green power LED D2 is flashing. LEDs D6, D7, D8, D9 and D12 are
OFF until the power transfer starts.
Apply the scope probe to the TX test point, TP15 drive B. Figure 9 shows TP15 and the input current
during the ping stage.
Figure 9. Analog and Digital Pings with No RX
Observe the single-pulse burst approximately every 500 ms. A digital ping is longer and is added at
random intervals. This digital ping begins communication with a receiver placed on the TX coil. In most
cases, the Analog pin will detect a receiver being placed on the TX pad. The digital ping is a backup which
captures any certified RX. Note that the overall current during the analog pin is substantially lower than the
digital ping.

Output Power (W)
Efficiency
0 2 4 6 8 10 12 14 16
0
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
D002
15-W RX 8 V
15-W RX 10 V
15-W RX 12 V
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6.2.2.2 Apply Receivers
Place the15-W RX on the top of the transmitting coil. Align the centers of the RX and TX coils. In the next
few seconds, observe that there is a "beep" from the TX and the status LED D6 flashes. Depending on the
15-W RX chosen, there may be LED indicators. These are an indication that communication between the
transmitter and the receiver is established and that power transfer has begun.
• The TX status LED, D6, flashes green during power transfer.
• Typical RX output voltage is 10 V, and the output current range is 0 mA to 1.5 A.
• Observe a continuous sine-wave on the TX test point TP15 when power transfer is active; the
frequency is 130 kHz.
• Make tests and measurements applicable to a normal 10-V power supply.
6.2.2.3 Efficiency
Measure the system efficiency by measuring the output voltage, output current, input voltage, and input
current and calculate efficiency as the ratio of the output power to the input power. Connect voltage
meters at the input and output of TX and RX (see Figure 7). Average the input current (the communication
pulses modulate the input current, distorting the reading). Figure 10 shows efficiency.
Figure 10. Efficiency vs Power, bq501210EVM-756 Transmitter and a 15-W Receiver
6.2.2.4 TX LED Behavior
The LED behavior of D6, D7 and D8 is set by the resistance from the LED_MODE pin to ground. The
default for the bq501210EVM-756 is 42.2 kΩ, making this LED CONTROL OPTION 1 (as seen in the
bq501210 data sheet, Table 3, LED Modes.
D2 – Green LED indicator of 3.3-V DC-to-DC converter. During STANDBY (no RX), D2 flashes at about a
one-half second rate. D2 is ON during power transfer and during fault conditions.
D6 – Green status LED driven by bq501210 (LED-A). Blinks during power transfer, D6 blinks about once
per second for 5 W or 15 W and about twice per second for the proprietary 10 W solution with the
bq51025 RX.
D7 – Red status LED driven by bq501210 (LED-B). On during fault condition (for example: FOD failure
and Temperature Fault) and blinks during FOD warning.
D8 – Yellow status LED driven by bq501210 (LED-C). D8 is unused for LED Option 1.
D9 – Green LED controlled by TX input voltage. Only on when the input voltage is between 8 V and 12 V.
D12 – Green LED controlled by TX input voltage. On when the input voltage is above 12 V. See
Section 6.2.2.8 for more information on D9 and D12.

TX
Communication
Digital ping
0
RX Initiates
Communication
1
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NOTE: Status LED behavior is controlled by LED mode resistor R9, 42.4 kΩfor mode 1. See the
bq501210 data sheet for additional options and configurations of LEDs D6, D7, and D8.
6.2.2.5 Start Up Receiver Placed on Transmitter
The transmitter sends a digital ping about every 500 ms. If a receiver is present, it powers up and replies,
then begins the power transfer. Figure 11 is a scope capture of the bq501210EVM-756 beginning a power
transfer with the 15-W RX.
Figure 11. Start Up
The bq501210 device supports 2-way communication between the receiver and transmitter. All
communication between the TX and RX is initiated by the RX. The TX will respond as appropriate.
Figure 12 shows the activity of the request and response during the startup phase. The TX_COMM (TP13)
is a test point that shows the simplified information sent from the TX to the RX following the WPC v1.2 2-
way communication protocol. See the WPC v1.2 specification for details on the communication protocol.
Figure 12. TX_COMM at Start Up

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6.2.2.6 Thermal Protection, NTC
Thermal protection is provided by an NTC resistor connected to JP3. At approximately 1 V on the sense
side (T_SENSE), the thermal fault is set, and the unit is shut down. The status LED, D8, illuminates. The
system tries to restart in 5 minutes.
6.2.2.7 Foreign Object Detection (FOD) and Parasitic Metal Object Detection (PMOD)
The bq501210 EVM supports multiple levels of protection against heating metal objects placed in the
magnetic field during power transfer. PMOD is used for older WPC v1.0 version receivers and FOD is
used for WPC v1.1 and WPC v1.2.
The first level is a short FOD ping that detects most objects before any power transfer is initiated, analysis
of the impulse response is used. Resistors R47 and R48 are used to tune this function, see the data sheet
for additional information.
The second level is power loss accounting, a comparison between power transmitted to the receiver (RX)
with the power the RX reported receiving. The difference is lost power possibly going into a foreign object.
The transmitter determines the power sent to the RX by measuring input power and calculating internal
losses. The RX measures the power it received and also calculates losses. The RX sends this information
to the TX in a digital word, message packet. Unaccounted for power loss is presumed to be a foreign
object on the charging pad. Should this lost power exceed the threshold set by R8, a FOD fault is set and
power transfer is stopped.
Three key measurements for the TX FOD calculation:
•Input Power – Product of input voltage and current. Input voltage is measured at V_SENSE though
R10 and R11. Input current is measured using sense resistor R28 and current sense amp U7
(bq500100). Since these measurements are used to calculate the power lost through a foreign object,
both measurements must be accurate.
•Power Loss in Transmitter – This is an internal calculation based on the operating point of the
transmitter. The calculation is adjusted using FOD_CAL resistor, R49. This calculation changes with
external component changes in the power path such as MOSFETs, resonate capacitors, and the TX
coil. Recalculation of R49 and R8 is required if changes are made.
•Receiver Reported Power – The receiver calculates and reports power it receives in the message
packet Received Power Packet.
The FOD threshold on the EVM is set to 600 mW, R8 is set to 100 kΩ. Increasing R8 increases the
threshold and reduces the sensitivity to foreign objects.
This loss threshold is determined after making a measurement of transmitter performance using a receiver
calibrated for FOD similar to a unit manufactured by Avid®Technology. Contact Texas Instruments for the
FOD calibration procedure for bq501210.
The PMOD threshold on the EVM is set to 600 mW, R16 is 100 kΩ. Removing R16 disables this function.
6.2.2.8 HVDCP: High Voltage Dedicated Charger Port
The HVDCP Circuitry is shown in Figure 6. The purpose of this circuitry is to give a visual indication of the
negotiation result when using a USB power source that has HVDCP capability. The circuit has been
disabled by default on this EVM to allow more precise measurement of efficiency. To enable the circuit,
simply insert 0-Ωresistors for R60 and R61 along with an 8.66-kΩresistor for R50.
To enable the USB port, jumper JP4 must be set to select USB. When an HVDCP supply is plugged into
J5, 5 V is passed to the system. The negotiation for higher voltage is done through the resistors on the
D+/D- pins.
Once the circuit is enabled, two LEDs will indicate the voltage level of the system. When D9 is on, it
indicates the system is about 9 V. D12 indicates the USB is > 12 V.

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6.2.2.9 Thermal Performance
This section shows a thermal image of the bq501210EVM-756. A 1500-mA load is used at the 10-V 15-W
receiver output. Output power is approximately 15 W, 1.5 A at 10 V. The maximum board temperature, at
L2, is 35.5°C.
Figure 13. Thermal Performance