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STEVAL-ISB027V1
Qi A11 wireless charger transmitter evaluation board based on
STWBC
Data brief
Description
The STEVAL-ISB027V1 is a Qi 5 Watt wireless
battery charger transmitter evaluation board
based on the STWBC digital controller for
wireless battery charger transmitters. The
solution is certified in accordance with the Qi
standard, A11 topology. The STEVAL-ISB027V1
provides a complete kit which includes the
STWBC IC, firmware, layout and tools. The
layout is based on a cost-effective 2-layer PCB.
Features









STWBC digital controller
5 W output power
Qi 1.1.2 A11 certified
Foreign object detection (FOD)
Resistive and capacitive modulation
Active presence detector
Turn-key & FW APIs
complete kit (IC, firmware, tools)
RoHS compliant
March 2015
Tools for the STEVAL-ISB027V1 are available on
www.st.com, and allow users to access run time
information such as the current power delivered
or the FOD status. The STWBC firmware offers
users the flexibility to modify the behavior of the
LEDs or GPIOs, while adding customizable I²C
and UART communication.
DocID027320 Rev 3
For further information contact your local STMicroelectronics sales
office
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www.st.com
IDEMOD
1
C22
100PF
D3
6.2V
2 V-
3 -IN
R51
330R
3
R25
220K
BAV99W
D7
OUT 4
V+ 5
R31
47K
VMAIN
47PF
C27
LMV931
-
+
U4
C18
100NF
1 +IN
C24
100NF
47UF
+ C17
Layout note : GND reference of the Op Amp inputs
have to be connectedni star ground connection with
the GND plan of the power bridge.
1M
R48
TP13
WIRE_SOLDER
1
1
2
33NF
100NF
C33
C25
VDD_STWBC
270NH
R24
R52
22K
TP4
1
C26
1NF
TP10
RESET
CURRENT_DEMOD
R49
100K
VDD_STWBC
R27
10K
D4
RED
R40
1.8K
LEDR
TP3 J3
1
1
4
5
DNBR
TP7
C19 1UF
SWIM
UPBR
UPBL
DNBL
C20
100NF
R30
100K
STWBC
UART_TX
UART_RX
GPIO_0
GPIO_1
TP6
100K
R41
DRIVEOUT[0]
DRIVEOUT[1]
DRIVEOUT[2]
DRIVEOUT[3]
PWM_AUX/GPIO_2
SWIM
NRST
VOUT
U3
D5
GREEN
R39
1.8K
32
1
6
7
21
24
25
5
2
27
28
31
STWBC Digital Controller
VDD_STWBC
1
5V
RESET
VDD_STWBC
SWIM
33
30
+5 V D C
1
DocID027320 Rev 3
1
29
VDD
VSS
VSS
13
DIGIN[0]
DIGIN[1]
SWIM_CONN
1
2
3
4
J4
TANK_VOLTAGE
VBRIDGE
SPARE_ADC
NTC_TEMP
ISENSE
VMAIN
CPP_INT_3
CPP_INT_2
CPP_REF
CPP_INT_1
CPP_INT_0
DIGIN[2]
I2C_SDA/DIGIN[4]
I2C_SCL/DIGIN[5]
R34
1K
VDDA
VSSA
14
2/6
I2C_SDA
I2C_SCL
LEDR
15
16
17
18
19
20
8
9
10
11
12
26
3
4
22
23
R47
100K
USER
I2C_SCL
VMAIN
SWIM_CONN
1
2
3
4
J5
ISENSE
COIL_TEMP
R36 100K
TANK_VOLTAGE
R35 100K
SYMBOL_DETECT1
SYMBOL_DETECT2
VMAIN
CURRENT_DEMOD
R46
100K
R29
10K
TP2
1
R38
50K
R26
180K
Layout Note:
Please Place NTC
Very very close
to the Main Coil
5V
C21
100NF
1
NTC
TP14
WIRE_SOLDER
Schematic diagram
STEVAL-ISB027V1
Schematic diagram
Figure 1: STEVAL-ISB027V1 circuit schematic (1 of 3)
GSPG1812140915SG
I2C_SDA
STEVAL-ISB027V1
Schematic diagram
Figure 2: STEVAL-ISB027V1 circuit schematic (2 of 3)
DocID027320 Rev 3
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Schematic diagram
STEVAL-ISB027V1
Figure 3: STEVAL-ISB027V1 circuit schematic (3 of 3)
POWER_NODE
R1
1K
R60
C30
470R
1NF
3
BRIDGE_L
1
2
D6
BAV99W
C1
C2
10NF
10NF
R2
1M
R3
150K
R4
0R
C4
TANK_VOLTAGE
R5
33K
C3
470PF
6.8NF
C5
R61
R62
1M
1M
6.8NF
R10
R11
33K
33K
C31
C32
100PF
100PF
VDD_STWBC
TP9
1
SYMBOL_DETECT2
1
TP8
R13
100K
R12
100K
1
2
3
SYMBOL_DETECT1
6
5
4
Q5
BC847CDW1T1G
R14
2.2K
GSPG1812140925SG
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DocID027320 Rev 3
STEVAL-ISB027V1
2
Revision history
Revision history
Table 1: Document revision history
Date
Rev
Changes
18-Dec-2014
1
First release.
11-Feb-2015
2
Updated title in cover page.
02-Mar-2015
3
Updated figure 2 STEVAL-ISB027V1 circuit schematic (2 of 3)
DocID027320 Rev 3
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STEVAL-ISB027V1
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DocID027320 Rev 3
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