Post on 13-Mar-2020
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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