November 2016 DocID029590 Rev 2 1/7

For further information contact your local STMicroelectronics sales office

www.st.com

STEVAL-ISB038V1T

1 W wearable wireless power transmitter based on STWBC-WA

Data brief

Features • STWBC-WA based wireless power

transmitter − Additional transmitter module

compatible with the STEVAL-ISB038V1 reference kit

− Cost effective Half Bridge topology with integrated drivers

− Optional Full Bridge configuration for 3 W applications

− Active presence detector − 2-layer PCB for easy design − Turnkey solution or customizable via

APIs − Parametric customization via graphical

interface • Full KIT characteristics:

− 11 mm coil on Receiver − 20 mm coil on Transmitter − 1 Watt delivered on Receiver side

− USB 5 V input − Foreign Object Detection (FOD)

optional − Graphical interface for monitoring

behavior − Total reference design − RoHS compliant

• STWLC04 wireless power receiver − Output voltage: 5 V regulated voltage − Integrated high efficiency synchronous

rectifier − Li-Ion/Li-Pol charger functionality − 4-layer PCB for easy design

Description STEVAL-ISB038V1T is the wireless battery charger transmitter module in the STEVAL-ISB038V1 Reference Design Kit.

The STEVAL-ISB038V1 is a wireless battery charger evaluation kit designed for ultra-compact battery operated devices such as wearable gear, smartwatches, Internet Of Things sensors, medical devices, etc.

The kit supports wireless power transfer of 1 Watt over an 11 mm coil on the receiver side and 20 mm on transmitter side.

The kit configuration delivers 1 Watt of power at the receiver side.

While the Kit is configured to support low power (1 W) applications, it can support up to 3 W applications with wider coils or by switching to full-bridge configuration on the transmitters.

The STWBC-WA transmitter is based on a cost-effective half bridge topology (full-bridge optional) offering the flexibility of a powerful software API allowing LED and GPIO control, as well as adding external interfaces via I²C and UART communication ports.

Continued description STEVAL-ISB038V1T

2/7 DocID029590 Rev 2

1 Continued description The STWLC04 receiver can deliver the output power in the following modes:

1. as a power supply with configured output voltage 2. as a CC/CV battery charger with configurable charging current and voltage

The full kit provides the STWBC-WA demo board, the STWLC04 demo board, a graphical interface to monitor the transmitter behavior, schematics, layout files and bill of materials.

Tools for the STEVAL-ISB038V1 are available on www.st.com and allow users to access runtime information such as the power delivered or the protocol status, as well as adjust certain parameters.

STEVAL-ISB038V1T Schematic diagrams

DocID029590 Rev 2 3/7

2 Schematic diagrams Figure 1: STEVAL-ISB038V1T transmitter control stage

STW

BCD

igita

lCon

trolle

r

Layo

ut n

ote:

Ple

ase

plac

e N

TC

very

ver

y cl

ose

to th

e M

ain

Coi

l

+5V

DC

5V

VD

D_S

TWB

C

VD

D_S

TWB

C

DN

BL

ISE

NS

E

UP

BL

WAV

E_S

NS

R8 0R

R4

1M

TP7 1

R3

1K

TP8 1

M1

HO

LE_2

MM

R9 0R

MIS

C3

OP

TIC

AL_

TAR

GE

T

TP3

TP

1

C10

10N

F

R7 0R

TP4

1

D3

GR

EE

N

TP9 1

R6

47K

C5

100N

F

J1

US

B_V

CC

1

US

BD

M2

US

BD

P3

US

B_G

ND

5

SH

ELL

6

SH

ELL

7

SH

ELL

8

ID4

SH

ELL

9

C6

100N

F

R17

100K

R13

470R

D1

ES

DA

7P60

-1U

1M

21

L1 180R

U1

VDD29

VDDA13

VO

UT

31

VSS30

VSSA14

DR

IVE

OU

T[0]

21

DR

IVE

OU

T[1]

24

DR

IVE

OU

T[2]

25

DR

IVE

OU

T[3]

5

PW

M_A

UX

/GP

IO_2

2

UA

RT_

TX32

UA

RT_

RX

1

GP

IO_0

6

GP

IO_1

7

NR

ST

28S

WIM

27

TAN

K_V

OLT

AG

E15

VB

RID

GE

16

SPA

RE

_AD

C17

NTC

_TE

MP

18

ISE

NS

E19

VM

AIN

20

CP

P_I

NT_

38

CP

P_I

NT_

29

CP

P_R

EF

10

CP

P_I

NT_

111

CP

P_I

NT_

012

DIG

IN[0

]22

DIG

IN[1

]23

DIG

IN[2

]26

I2C

_SD

A/D

IGIN

[4]

3

I2C

_SC

L/D

IGIN

[5]

4

VSS33

TP6 1

C3

47uF

MIS

C2

OP

TIC

AL_

TAR

GE

T

M2

HO

LE_2

MM

R16

100K

C4

10N

F

R1

270N

H

C8

1UF

TP11 1

TP5

1

R15

47K

R10

180K

R14

470R

C9

10N

F

TP1

TP

1

C7

100N

F

C2

4.7N

F

D2

RE

D

R12

100K

TP2 1

TP12

TP

1

R18

100K

R2

220K

C1

47uF

J2 SW

IM_C

ON

N

1 2 3 4

R11 0R

TP10 1

MIS

C1

OP

TIC

AL_

TAR

GE

T

R5

10K

RE

SE

T

SW

IM

SW

IMR

ES

ET

LED

G

CO

IL_T

EM

P

LED

R

US

B_I

D

VD

D_S

TWB

C

US

B_D

MU

SB

_DP

US

B_I

D

US

B_D

M

US

B_D

P

US

B_D

P

US

B_D

M

VM

AIN

VM

AINVM

AIN

GSPG2007161110SG

NTC

STW

BC

-WA

Schematic diagrams STEVAL-ISB038V1T

4/7 DocID029590 Rev 2

Figure 2: STEVAL-ISB038V1T transmitter power stage

+5 V DC

* note : if not specified on the evaluation boardthe value is 100 nF.

Layout note : GND plan dedicated to thebridge and the power supply connector

5V

VDD_STWBC

UPBL

DNBL

ISENSE

WAVE_SNS

N2

C1910NF

C1110NF

C1210UF

C14

1NF

C20

10NF

R23470K

R24

470K

C16* 47NF

D4

BAV99W

3

1

2

C18 100NF

R250.022R

C15 NPN1

R201M

R2610K

Q3BC847CDW1T1G

2

3

1

4

5

6

R21100K

R19

1K

C17 100NF

R22

470K

C1310NF

1

2

6

5

3 4

Q2

STL6N3LLH6

Q1

STL4P2UH7

3

1

2

4

5

6

GSPG2007161130SG

STEVAL-ISB038V1T Schematic diagrams

DocID029590 Rev 2 5/7

Figure 3: STEVAL-ISB038V1T USB to UART dongle

USB

5V 3V3

IO V

olta

ge S

elec

tion

(3V3

/ 5V

)

VBU

S Ex

tern

alPo

wer

Sup

ply

Con

nect

or

VBUS

_USB

_MAS

TER

VSS

VSS

VSS

VSS

VSS

VSS

VSS

VCC_

IO

VCC_

IOVCC_

IO

VSS

VSS

VSS

VSS

VSS

VBUS

_USB

_MAS

TER

VBUS

VBUS

VSS

R34

10K

U2

FT23

2 RTXD

1

DTR

#2

RTS

#3

VCCI

O4

RXD

5

RI#

6

GN

D7

V CC3

I8

DSR

#9

DC

D#10

CT S

#11

SLEE

P#12

GPI

O2

13

GPI

O3

14

OSC

O28

OSC

I27

TEST

26

AGN

D25

AVC

C24

GPI

O1

23

GP I

O0

22

GN

D21

VCC5

I20

RES

ET#

19

GN

D18

VCC3

O17

USB

DM

16

USB

DP

15

R28

NP

J4

12

R37

0R

C26

47PF

R36

10K

J548

037-0

001

VBU

S1

USB

DM

2U

SBD

P3

GN

D4

SHEL

L15

SHEL

L48

SHEL

L26

S HEL

L37

C24

100N

F

R27

0R

R30

330R

C25

47PF

J6

CN-

USB-

A

USB

_ VC

C1

USB

DM

2U

SBD

P3

USB

_GN

D4

SHELL15

SHELL26

C23

100N

F

R33

0R

R31

330R

R29

0R

R35

0R

C22

10UF

C27

100N

F

R32

0R

C21

10NFL2 12

0R

J3

12

U3

USBL

C6-2

SC6

I/O1#

11

GN

D2

VBU

S5

I/O2#

44

I/O1#

66

I/O2#

33

TXD

VCC3

O

UART

_RX

RXD

UART

_TX

USBD

P

USBD

M

GSPG2007161150SG

Revision history STEVAL-ISB038V1T

6/7 DocID029590 Rev 2

3 Revision history Table 1: Document revision history

Date Version Changes

03-Aug-2016 1 Initial release.

21-Nov-2016 2 Updated board photo on the cover page.

STEVAL-ISB038V1T

DocID029590 Rev 2 7/7

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