ST STEVAL-IFP042V1 User manual

Introduction
The STEVAL-IFP042V1 is an industrial digital output expansion board based on ISO808A and compatible with STM32 Nucleo. It
provides a powerful and flexible environment for the evaluation of the driving and diagnostic capabilities of the ISO808A octal
high-side smart power solid state relay, with embedded galvanic isolation and 20 MHz SPI control interface, in a digital output
module connected to 0.7 A industrial loads.
The STEVAL-IFP042V1 directly interfaces with the microcontroller on the STM32 Nucleo driven by GPIO pins and Arduino® R3
connectors, ensuring connectivity with either a NUCLEO-F401RE or a NUCLEO-G431RB development board.
The galvanic isolation between the microcontroller and the process stage is guaranteed by the ISO808A.
It is also possible to evaluate a 16 channel digital output system enabling the daisy chaining feature on two STEVAL-IFP042V1
stacked expansion boards.
Figure 1. STEVAL-IFP042V1 expansion board
Industrial digital output expansion board based on ISO808A in TFQFPN32
package
UM3136
User manual
UM3136 - Rev 1 - October 2023
For further information contact your local STMicroelectronics sales office. www.st.com

1 Getting started
1.1 Overview
The STEVAL-IFP042V1 embeds the ISO808A intelligent power switch (IPS), which features galvanic isolation, 20
MHz SPI and Power Good diagnostic, overcurrent and overtemperature protection for safe output loads control.
The board is designed to meet the application requirements for the galvanic isolation between the user and power
interfaces.
The galvanic isolation embedded by the ISO808A satisfies this requirement, avoiding the necessity of external
optocouplers, with a consequent cost saving and a reduced application size.
The expansion board features:
• Based on the ISO808A octal high-side switch, which features:
– Operating range 9.2 to 36 V
– Low power dissipation (RON(MAX) = 260 mΩ)
– Process side operating current: up to 0.7 A per channel
– Embedded 2.5k VRMS galvanic isolation
– PGOOD (VCC voltage level alarm signalization)
– 20 MHz SPI with daisy chaining
– Fast decay for inductive loads
– Undervoltage lock-out
– Overload and overtemperature protections
– Loss of ground protection
– TFQFPN32 package
• Application board process side operating range: 10 (J10 open) to 33 V (J9 closed)
• Extended operating range of process side from 9.2 (J10 closed) up to 36 V (J9 open)
• Application board logic side operating voltage 3.3 to 5 V
• Green LEDs for outputs on/off status (J6 and J7 close 1-2, 3-4, 5-6, 7-8)
• Red LED for common overheating and communication error diagnostic (J3 close 1-2)
• Red LED for PGOOD signalization (J3 close 3-4)
• Yellow LED for output enable status signalization (J3 close 5-6)
• Process and logic supply rails reverse polarity protections
• Compatible with STM32 Nucleo development boards
• Equipped with Arduino® UNO R3 connectors
• RoHS and China RoHS compliant
• CE certified
• Radiated emission: class B according to the standard EN 55032
UM3136
Getting started
UM3136 - Rev 1 page 2/19

1.2 Digital section
The digital section is associated with the STM32 interface and the digital supply voltage to and from the STEVAL-
IFP042V1 expansion board.
Figure 2. STEVAL-IFP042V1 expansion board: digital interface section
The dotted green line indicates the whole digital interface section. The pink rectangles identify the Arduino® UNO
R3 connectors.
The four Arduino® UNO R3 connectors:
• allow the expansion board to communicate with the STM32 Nucleo development microcontroller board
accessing the STM32 peripheral and GPIO resources;
• provide the digital supply voltage between the STM32 Nucleo development board and the STEVAL-
IFP042V1 expansion board, in either direction.
Usually, the STM32 Nucleo development board supplies the expansion board by a 3.3 V or 5.0 V generated by
the USB.
Alternatively, it is possible to supply the STM32 Nucleo development board from the expansion board. In this
case, an external supply voltage (7-12 V) should be connected to the CN11 connector (not mounted by default)
on the expansion board and the ground loop should be closed by mounting D2 (enabling the reverse polarity
protection) or by closing J5 (without reverse polarity). In this scenario, the logic side of the ISO808A can be
supplied by the 3.3 V supply rail generated by the expansion board: in this case, on the STEVAL-IFP042V1, J4
must be closed between pins 5 and 6.
To supply the VIN voltage rail, it is necessary to:
• close the JP5 jumper between pins 2 and 3 and open the JP1 jumper on the NUCLEO-F401RE;
• open the JP5 jumper between pins 1 and 2 and close the JP5 jumper between pins 3 and 4 on the
NUCLEO-G431RB.
The pin 3 of the connector CN11 can be used to supply the logic side of the ISO808A independently by the
expansion board. In this case, on the STEVAL-IFP042V1, the pins 1 and 2 of J4 must be closed (pins 5-6 open).
UM3136
Digital section
UM3136 - Rev 1 page 3/19

1.3 Power section
The power section involves the power supply voltage (CN1, pin 1 for VCC, pin 2 for GND), the load connection
(eight loads can be connected between each pin of CN2, CN3, CN4, and CN12 and pin 2 of CN1), EMC
protections (U2), and supply reverse polarity protection (D1).
Figure 3. STEVAL-IFP042V1 expansion board: power section
1. ISO808A
2. Output and power supply connector
3. Output channels - green LEDs
4. Status (overtemperature) red LED
5. Output Enable yellow LED
6. Power Good - red LED
For EMC:
• the SM15T39CA transient voltage suppressor (U2), enabled by closing J9, is placed between VCC and
GND tracks to protect the ISO808A against surge discharge on the supply rail path up to ±1 kV/2 Ω
coupling;
• in the common mode surge testing, two single-layer capacitors (C11 and C12 - not included) must be
soldered at the predisposed locations;
• the ISO808A output stages do not require additional EMC protections with respect to the IEC61000-4-2,
IEC61000-4-3, IEC61000-4-4, IEC61000-4-5, IEC61000-4-8 standards.
The EMC performance of the STEVAL-IFP042V1 is detailed below:
• for emission (when the DC input port of the board is powered by an AC-DC, DC-DC or battery with a cable
that does not exceed a three-meter length), compliance with standards:
– EN IEC 61000-6-3:2021
– EN 55032:2015 +A1:2020
• for immunity, compliance with standards:
– EN IEC 61000-6-1:2019
– EN 55035:2017 +A11:2020
UM3136
Power section
UM3136 - Rev 1 page 4/19

1.4 Hardware requirements
The STEVAL-IFP042V1 expansion board is designed to be used with the NUCLEO-F401RE or NUCLEO-
G431RB STM32 Nucleo development boards.
To function correctly, the STEVAL-IFP042V1 must be plugged onto the matching Arduino® UNO R3 connector
pins on the STM32 Nucleo board as shown below.
Figure 4. STEVAL-IFP042V1 and STM32 Nucleo stack
1.5 System requirements
To use the STM32 Nucleo development boards with the STEVAL-IFP042V1 expansion board, you need:
• a Windows PC/laptop (Windows 7 or above)
• a type A to mini-B USB cable to connect the STM32 Nucleo board to the PC when using a NUCLEO-
F401RE development board
• a type A to micro-B USB cable to connect the STM32 Nucleo board to the PC when using a NUCLEO-
G431RB development board
• the X-CUBE-IPS firmware and software package installed on your PC/laptop
UM3136
Hardware requirements
UM3136 - Rev 1 page 5/19

1.6 Board setup
Step 1. Connect the mini-USB or micro-USB cable to your PC to use the STEVAL-IFP042V1 with NUCLEO-
F401RE or NUCLEO-G431RB development board.
Step 2. Download the proper firmware (.bin) onto the STM32 Nucleo development board microcontroller
through the STM32 ST-LINK utility, STM32CubeProg, and according with information detailed in the
table below. The STEVAL-IFP042V1 can be used to control the ISO808A device in three different
modes available for the user in three different example projects: Regular_8_Channels (standalone
board, default hardware configuration), Regular_16_Channels (two stacked independent boards, one
needs to be reworked as in hardware Regular_16_Channels configuration) and DaisyChain (two
stacked boards both reworked as in hardware Daisy chain configuration). The binary files provided with
the X-CUBE-IPS software package enable the user to choose the preferred control mode by selecting
the binary file contained in the proper example project binary folder, as reported in the following table.
Table 1. Nucleo development boards binary files
Nucleo board Binary path
NUCLEO-F401RE
Projects\STM32F401RE-Nucleo\
Examples\OUT12A1\DaisyChain\Binary\DaisyChain.bin
Projects\STM32F401RE-Nucleo\
Examples\OUT12A1\Regular_8_Channels\Binary\Regular_8_Channels.bin
Projects\STM32F401RE-Nucleo\
Examples\OUT12A1\Regular_16_Channels\Binary\Regular_16_Channels.
bin
NUCLEO-G431RB
Projects\STM32G431RB-Nucleo\
Examples\OUT12A1\DaisyChain\Binary\DaisyChain.bin
Projects\STM32G431RB-Nucleo\
Examples\OUT12A1\Regular_8_Channels\Binary\Regular_8_Channels.bin
Projects\STM32G431RB-Nucleo\
Examples\OUT12A1\Regular_16_Channels\Binary\Regular_16_Channels.
bin
Note: Additional details on each hardware configuration are available inside the X-CUBE-IPS software
package as reported in the below table:
Table 2. Additional information on board configuration
Board configuration Readme file
DaisyChain Examples\OUT12A1\DaisyChain\readme.html
Regular_8_Channels Examples\OUT12A1\Regular_8_Channels\ readme.html
Regular_16_Channels Examples\OUT12A1\Regular_16_Channels\ readme.html
Step 3. Connect the ISO808A device supply voltage via CN1 (see Section 1.3 Power section).
Step 4. Provide the digital supply voltage (see Section 1.2 Digital section).
Step 5. Connect the load on the output connector (see Section 1.3 Power section).
Step 6. Reset the example sequence by pushing the black button on the STM32 Nucleo board.
Step 7. Push the blue button on the STM32 Nucleo board to choose among the examples provided in the
default firmware package.
UM3136
Board setup
UM3136 - Rev 1 page 6/19

2 Schematic diagrams
Figure 5. STEVAL-IFP042V1 circuit schematic (1 of 2)
Alternate use
PB4
PC1
PC0
PA0
PA10
PA2
Arduino connectors
PA5
PB8
PB9
Analog supply
10V - 36V
PB5
PA9
ISO808AQTR direct supply voltage:
- set to max 3.3 v
when STEVAL-IFP042V1 is used with NUCLEO board
-can be set to max 5.5 V
when STEVAL-IFP042V1 is used stand-alone
PB6
AVDD
DEFAULT
PA7
I OREF
DEFAULT
PA4
PB0 Alternate use
PA6
PB10
NRST
Alternate use
PA1
Alternate use
PA3
Morpho connectors
(not mounted)
PA8
PC7
(7-12V NUCLEO supply voltage)
PB3
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT
Alternate use
Alternate use
Alternate use
Alternate use
Alternate use
Alternate use
Alternate use
Alternate use
VCC
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
SPI_CLK
SPI_MISO
SPI_MOSI
SPI_SS
PGOOD
DaisyChain
STATUS
OUT_EN
EXT_Vdd
3v3 5v0
R120 100 N.M.
C12
4700pF
N.M.
D2 BAT48JFILM
N.M.
CN12
691214110002
1
2
J10
default open
CN1
691214110002
1
2
D1 STPS1H100A
CN3
691214110002
1
2
CN4
691214110002
1
2
R111 100 N.M.
CN6
SSQ-108-04-F-S
1
2
3
4
5
6
7
8
R118 100 N.M.
R105 100
CN11
691214110003
N.M.
1
2
3
CN2
691214110002
1
2
R117 100 N.M.
R102 100 N.M.
CN7
SSQ-119-04-L-D
N.M.
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
R107 100
TP8
5001
R119 100
D12
ESDA7P60-1U1M
N.M.
R112 100 N.M.
R103 100
CN9
SSQ-108-04-F-S
1
2
3
4
5
6
7
8
R116 100 N.M.
C11
4700pF
N.M.
R115 100 N.M.
R106 100
+
C9
47uF
N.M.
12
CN5
SSQ-110-04-F-S
1
2
3
4
5
6
7
8
9
10
CN10
SSQ-119-04-L-D
N.M.
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
C10
2.2uF
R101 100 N.M.
R108 100
R113 100 N.M.
U2
SM15T39CA
12
R109 100 N.M.
R114 100 N.M.
U3
ESDA15P60-1U1M
N.M.
R104 100
CN8
SSQ-106-04-F-S
1
2
3
4
5
6
J5
JUMPER-con2-strip-male
N.M. default open
J9
default closed
EARTH
STATUS
PGOOD
3V3
5V SPI_CLK
SPI_MISO
SPI_MOSI
VIN SPI_SS
DaisyChain
DaisyChain
VIN
SPI_CLK
SPI_MISO
SPI_MOSI
SPI_SS SPI_SS
STATUS
PGOOD DaisyChain PGOOD
OUT_EN PGOOD
SPI_SS DaisyChain
DaisyChain OUT_EN
STATUS STATUS
OUT_EN
OUT_EN
UM3136 - Rev 1 page 7/19
UM3136
Schematic diagrams

Figure 6. STEVAL-IFP042V1 circuit schematic (2 of 2)
OUT_EN
SPI_SS
SPI_CLK
SPI_MOSI
PGOOD
SPI_MISO
DaisyChain
STATUS
VCC
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT1
OUT2
OUT3
OUT4 OUT5
OUT6
OUT7
OUT8
EXT_Vdd
3v3
R27
15k
R20 22k
C24 33pF
C23 33pF
D13
SMBJ5.0A-TR
C26
0.1uF
R28
15k
J3
con6-2x3-strip-male
default: close 1-2, 3-4, 5-6
1 2
3 4
5 6
J13
con4-2x2-strip-male
default close 1-2
1 2
3 4
C1 10nF
C25
2.2uF
C22 33pF
R14 22k
R8 390
C21 33pF C14 33pF
R29
15k
C13
0.1uF
R15
1k
D15
LED YELLOW
AC
C8 10nF
D10
LED GREEN
AC
C7 10nF
R30
15k
R11 390
D16
RED LED
AC
D9
LED GREEN
AC
J7
con8-2x4-strip-male
J7 default: close 1-2, 3-4, 5-6, 7-8
12 34 56 78
D11
RED LED
AC
U1
ISO808AQTR
GNDdd
1
NC#2
2 3
GND1
OUT8a 4
OUT8b 5
OUT7a 6
OUT7b 7
OUT6a 8
OUT6b 9
OUT5a 10
OUT5b 11
OUT4a 12
OUT4b 13
OUT3a 14
OUT3b 15
OUT2a 16
OUT2b 17
OUT1a 18 OUT1b 19
Vdd 20
OUT EN
21
SS
22
CLK
23
SDI
24
PGOOD
25
NC#26
26
NC#27
27
NC#28
28
NC#29
29
NC#30
30
SDO
31
FAULT
32
36
TAB Vcc
33
GND2
34
GND3
35
GND4
C6 10nF
R121
1k
C5 10nF
R25
15k
D8
LED GREEN
AC
C4 10nF
J4
con6-2x3-strip-male
default: close 5-6
1 2
3 4
5 6
R10 390
R18
15k
D7
LED GREEN
AC
R2 0
R3 0
C3 10nF
D6
LED GREEN
AC
R9 390
J12
con4-2x2-strip-male
default close 1-2
1 2
3 4
C2 10nF
R1 390
D5
LED GREEN
AC
R26
15k
D4
LED GREEN
AC
R19
15k
J6
con8-2x4-strip-male
J6 default: close 1-2, 3-4, 5-6, 7-8
12 34 56 78
D3
LED GREEN
AC
R17
390
SPI_MOSI
DaisyChain
SPI_MISO
DaisyChain
UM3136 - Rev 1 page 8/19
UM3136
Schematic diagrams

3 Bill of materials
Table 3. STEVAL-IFP042V1 bill of materials
Item Q.ty Ref. Part/value Description Manufacturer Order code
18C1 C2 C3 C4
C5 C6 C7 C8
10nF 0603
(1608 Metric)
50V 10%
CAP CER
10000PF 50V
X7R 0603
Wurth
Electronics Inc. 885382206002
2 0 C9 47uF Radial,
Can 100V 20%
CAP 47 UF
20% 100 V (not
mounted)
Wurth
Electronics Inc. 860040875002
3 1 C10
2.2uF 1206
(3216 Metric)
100V 10%
CAP CER
2.2UF 100V
X7R 1206
AVX
Corporation 12061C225KAT2A
4 0 C11 C12
4700pF 1825
(4564 Metric)
3000V (3kV)
10%
CAP CER
4700PF 3KV
X7R 1825 (not
mounted)
Vishay Vitramon HV1825Y472KXHATHV
5 2 C13 C26
0.1uF 0805
(2012 Metric)
100V 10%
CAP CER
0.1UF 100V
X7R 0805
Wurth
Electronics Inc. 885012207128
65C14 C21 C22
C23 C24
33pF 0402
(1005 Metric)
10V 5%
CAPACITOR
CERAMIC SMD
0402
Wurth
Electronics Inc. 885012005010
7 1 C25
2.2uF 0402
(1005 Metric)
10V 20%
CAP CER
2.2UF 10V X5R
0402
Wurth
Electronics Inc. 885012105013
85CN1 CN2 CN3
CN4 CN12
691214110002
7.4X7 pitch 3.5
TERM BLK
2POS SIDE
ENT 3.5MM
PCB
Wurth
Electronics Inc. 691214110002
9 1 CN5 10 ways, 1 row
CONN RCPT
10POS 0.1
GOLD PCB
SAMTEC
4UCON ESQ-110-14-T-S 17896
10 2 CN6 CN9 8 ways, 1row
CONN RCPT
8POS 0.1
GOLD PCB
SAMTEC
4UCON ESQ-108-14-T-S 15782
11 0 CN7 CN10
CONN RCPT
38POS 0.1
GOLD PCB (not
mounted)
Samtec Inc. SSQ-119-04-L-D
12 1 CN8 6 ways, 1 row
CONN RCPT
6POS 0.1
GOLD PCB
SAMTEC
4UCON ESQ-106-04-T-S 15781
13 0 CN11
691214110003
10.5X7.4 pitch
3.5mm
TERM BLK
3POS SIDE
ENT 3.5MM
PCB (not
mounted)
Wurth
Electronics Inc. 691214110003
14 1 D1
STPS1H100A
DO-214AC,
SMA 1A
DIODE
SCHOTTKY
100V 1A SMA
ST STPS1H100A
15 0 D2
BAT48JFILM
SC-76,
SOD-323
750mV @
200mA 350mA
(DC)
DIODE
SCHOTTKY
40V 350MA
SOD323 (not
mounted)
ST BAT48JFILM
UM3136
Bill of materials
UM3136 - Rev 1 page 9/19

Item Q.ty Ref. Part/value Description Manufacturer Order code
16 8 D3 D4 D5 D6
D7 D8 D9 D10
LED GREEN
0603 (1608
Metric) 20mA
LED GREEN
CLEAR 0603
SMD
Wurth
Electronics Inc. 150060VS75000
17 2 D11 D16
RED LED 0603
(1608 Metric)
20mA
LED RED
CLEAR 0603
SMD
Wurth
Electronics Inc. 150060RS75000
18 0 D12 ESDA7P60-1U1
M 2-UDFN
TVS DIODE
5VWM 11.6VCL
1610 (not
mounted)
ST ESDA7P60-1U1M
19 1 D13
SMBJ5.0A-TR
DO-214AA,
SMB 600W
TVS DIODE 5V
13.4V SMB ST SMBJ5.0A-TR
20 1 D15
LED YELLOW
0603 (1608
Metric) 20mA
LED YELLOW
CLEAR 0603
SMD
Wurth
Electronics Inc. 150060YS75000
21 1 J3 con6-2x3-strip-
male
CONN
HEADER .100
DUAL STR
6POS
Wurth
Electronics Inc. 61300621121
22 1 J4 con6-2x3-strip-
male
CONN
HEADER .100
DUAL STR
6POS
Wurth
Electronics Inc. 61300621121
23 0 J5 JUMPER-con2-
strip-male
JUMPER-
CONN
HEADER .100
STR 2POS (not
mounted)
Wurth
Electronics Inc. 61300211121
24 2 J6 J7 con8-2x4-strip-
male
CONN
HEADER VERT
8POS 2.54MM
Wurth
Electronics Inc. 61300821121
25 2 J9 J10 JUMPER-con2-
strip-male
JUMPER-
CONN
HEADER .100
STR 2POS
Wurth
Electronics Inc. 61300211121
26 2 J12 J13 con4-2x2-strip-
male
CONN
HEADER .100
DUAL STR
4POS
Wurth
Electronics Inc. 61300421121
27 5 R1 R8 R9 R10
R11
390 0402 (1005
Metric) 0.1W,
1/10W 5%
CHIP
RESISTOR
SMD 5% 1/10W
0402
Panasonic ERJH2GJ391X
28 2 R2 R3
0 0402 (1005
Metric) 0.1W,
1/10W 0%
CHIP
RESISTOR
SMD 0% 1/10W
0402
Panasonic ERJH2G0R00X
29 2 R14 R20
22k 0603 (1608
Metric) 0.1W,
1/10W 1%
RES SMD 22K
OHM 1% 1/10W
0603
Yageo RC0603FR-0722KL
30 1 R17
390 0603 (1608
Metric) 0.1W,
1/10W 1%
RES SMD 390
OHM 1% 1/10W
0603
Yageo RC0603FR-07390RL
31 2 R15 R121
1k 0603 (1608
Metric) 0.1W,
1/10W 1%
RES SMD 1K
OHM 1% 1/10W
0603
Yageo RC0603FR-071KL
UM3136
Bill of materials
UM3136 - Rev 1 page 10/19