ST STEVAL-IFP041V1 User manual
Introduction
The STEVAL-IFP041V1 is an industrial digital output expansion board based on ISO808 and compatible with STM32 Nucleo. It
provides a powerful and flexible environment for the evaluation of the driving and diagnostic capabilities of the ISO808 octal
high-side smart power solid state relay, with embedded galvanic isolation, in a digital output module connected to 0.7 A
industrial loads.
The STEVAL-IFP041V1 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 ISO808.
It is also possible to evaluate a system composed of a STEVAL-IFP041V1 stacked on other expansion boards.
Figure 1. STEVAL-IFP041V1 expansion board
Industrial digital output expansion board based on ISO808 in TFQFPN32 package
UM3135
User manual
UM3135 - Rev 1 - October 2023
For further information contact your local STMicroelectronics sales office. www.st.com
1 Getting started
1.1 Overview
The STEVAL-IFP041V1 embeds the ISO808 intelligent power switch (IPS), which features galvanic isolation,
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 ISO808 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 ISO808 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
– Direct (jitter < 20us) and synchronous (jitter < 6us) control modes
– 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)
• Yellow LED for output enable status signalization (J3 close 5-6)
• Direct control mode (J1, J2 closed)
• Synchronous control mode (J1, J2 open)
• 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
UM3135
Getting started
UM3135 - 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-
IFP041V1 expansion board.
Figure 2. STEVAL-IFP041V1 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-
IFP041V1 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 ISO808 can be
supplied by the 3.3 V supply rail generated by the expansion board: in this case, on the STEVAL-IFP041V1, 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 ISO808 independently by the
expansion board. In this case, on the STEVAL-IFP041V1, the pins 1 and 2 of J4 must be closed (pins 5-6 open).
UM3135
Digital section
UM3135 - 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-IFP041V1 expansion board: power section
1. ISO808
2. Output and power supply connector
3. Output channels - green LEDs
4. Status (overtemperature) red LED
5. Output Enable yellow LED
For EMC:
• the SM15T39CA transient voltage suppressor (U2), enabled by closing J9, is placed between VCC and
GND tracks to protect the ISO808 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 ISO808 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-IFP041V1 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
UM3135
Power section
UM3135 - Rev 1 page 4/19
1.4 Hardware requirements
The STEVAL-IFP041V1 expansion board is designed to be used with the NUCLEO-F401RE or NUCLEO-
G431RB STM32 Nucleo development boards.
To function correctly, the STEVAL-IFP041V1 must be plugged onto the matching Arduino® UNO R3 connector
pins on the STM32 Nucleo board as shown below.
Figure 4. STEVAL-IFP041V1 and STM32 Nucleo stack
1.5 System requirements
To use the STM32 Nucleo development boards with the STEVAL-IFP041V1 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
UM3135
Hardware requirements
UM3135 - 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-IFP041V1 with NUCLEO-
F401RE or NUCLEO-G431RB development board
Step 2. Download the firmware (.bin) onto the STM32 Nucleo development board microcontroller through
STM32 ST-LINK utility, STM32CubeProgrammer, and according to information detailed in the table
below.
The STEVAL-IFP041V1 can be used to control the ISO808 device in two different modes: Direct
Control Mode (DCM) and Synchronous Control Mode (SCM). 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\OUT011A1\DirectMode\Binary\DirectMode.bin
Projects\STM32F401RE-
Nucleo\Examples\OUT11A1\SynchronousMode\Binary\SynchronousMode.bin
NUCLEO-G431RB
Projects\STM32G431RB-Nucleo\Examples\OUT011A1\DirectMode\Binary\DirectMode.bin
Projects\STM32G431RB-
Nucleo\Examples\OUT011A1\SynchronousMode\Binary\SynchronousMode.bin
Step 3. Connect the ISO808 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.
UM3135
Board setup
UM3135 - Rev 1 page 6/19
2 Schematic diagrams
Figure 5. STEVAL-IFP041V1 circuit schematic (1 of 2)
ISO808QTR direct supply voltage:
- set to max 3.3 V
when STEVAL-IFP041V1 is used with NUCLEO board
- can be set to max 5.5 V
when STEVAL-IFP041V1 is used stand-alone
( 7-12 V NUCLEO supply voltage )
Alternate use
Morpho connectors
(not mounted)
DEFAULT
Analog supply
10-36 V
DEFAULT
PA6
DEFAULT
Alternate use
Alternate use
PB8
PA8
PA4
PA5
PA3
I OREF
Arduino connectors
PA10
Alternate use
PB6
PC0
NRST
PB5
PB4
Alternate use PB9
DEFAULT
PB0
DEFAULT
PC7
PB3
DEFAULT
DEFAULT
DEFAULT
PA7
PA2
PA1
AVDD
PA0
Alternate use
PA9
PC1
PB10
Alternate use
DEFAULT
Alternate use
DEFAULT
DEFAULT
DEFAULT
VCC
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
STATUS
OUT_EN
SYNCH
LOAD
EXT_Vdd
3v3 5v0
R103 100 N.M.
J5
JUMPER-con2-strip-male
N.M. default open
CN8
SSQ-106-04-F-S
1
2
3
4
5
6
C10
2.2uF
R114 100
C12
4700pF
N.M.
R111 100
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
CN5
SSQ-110-04-F-S
1
2
3
4
5
6
7
8
9
10
U2
SM15T39CA
12
R117 100 N.M.
R104 100 N.M.
R120 100 N.M.
R106 100 N.M.
R102 100
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
D12
ESDA7P60-1U1M
N.M.
R115 100 N.M.
J10
default open
CN1
691214110002
1
2
CN4
691214110002
1
2
CN9
SSQ-108-04-F-S
1
2
3
4
5
6
7
8
R107 100 N.M.
R118 100
R112 100
J9
default closed
+
C9
47uF
N.M.
12
R109 100
CN6
SSQ-108-04-F-S
1
2
3
4
5
6
7
8
R101 100
R105 100 N.M.
C11
4700pF
N.M.
R113 100
CN12
691214110002
1
2
CN3
691214110002
1
2
CN2
691214110002
1
2
U3
ESDA15P60-1U1M
N.M.
R119 100
R108 100
R116 100
R110 100
D2 BAT48JFILM
N.M.
TP8
5001
D1 STPS1H100A
CN11
691214110003
N.M.
1
2
3
EARTH
STATUS
STATUS
3V3
5V
VIN
IN1
IN2
VIN
IN1
IN2
IN3
IN4
IN5
IN3 IN6
IN4
OUT_EN IN5 IN7
OUT_EN IN6
SYNCH IN7 IN8
SYNCH IN8
LOAD STATUS
LOAD OUT_EN
SYNCH
LOAD
UM3135 - Rev 1 page 7/19
UM3135
Schematic diagrams
Figure 6. STEVAL-IFP041V1 circuit schematic (2 of 2)
OUT_EN
SYNCH
LOAD
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
STATUS
VCC
OUT1
OUT1
OUT2
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
EXT_Vdd
3v3
R15
1k
C6 10nF
R4 390
J6
con8-2x4-strip-male
J6 default: close 1-2, 3-4, 5-6, 7-8
12
34
56
78
D3
LED GREEN
AC
R8 390
R27
15k
J4
con6-2x3-strip-male
default: close 5-6
1 2
3 4
5 6
R1 390
C24 100pF
R10 390
R24 22k
C23 100pF
J3
con6-2x3-strip-male
default: close 1-2, 5-6
1 2
3 4
5 6
C5 10nF
C2 10nF
C22 100pF
R28
15k
R12 22k
C21 100pF
R17
390
C20 100pF
R6 390
R20 22k
R29
15k
R9 390
C19 100pF
C3 10nF
R3 390
R13 22k
C18 100pF
J2
default open
D13
SMBJ5.0A-TR
C17 100pF
C26
0.1uF
R7 390
J1
default open
D10
LED GREEN
AC
R21 22k
R30
15k
C25
2.2uF
R2 390
C1 10nF
C16 100pF
J7
con8-2x4-strip-male
J7 default: close 1-2, 3-4, 5-6, 7-8
12
34
56
78
C4 10nF
R14 22k
C15 100pF
D9
LED GREEN
AC
R25
15k
C14 100pF
D8
LED GREEN
AC
R22 22k
R18
15k
D7
LED GREEN
AC
D6
LED GREEN
AC
C8 10nF
D5
LED GREEN
AC
C7 10nF
R5 390
R26
15k
D15
LED YELLOW
AC
U1
ISO808QTR
Vdd 20
OUT_EN
21
SYNC
22
LOAD
23
IN1
24
IN2
25
IN3
26
IN4
27
IN5
28
IN6
29
IN7
30
IN8
31
FAULT
32
GND_dd
1
EP_GNDcc
33
EP_GNDcc
34
EP_GNDcc
35
GNDcc
3
NC#2
2
OUT8 4
OUT8 5
OUT7 6
OUT7 7
OUT6 8
OUT6 9
OUT5 10
OUT5 11
OUT4 12
OUT4 13
OUT3 14
OUT3 15
OUT2 16
OUT2 17
OUT1 18
OUT1 19
VCC EP
C13
0.1uF
D4
LED GREEN
AC
R11 390
D11
RED LED
AC
R23 22k
R19
15k
UM3135 - Rev 1 page 8/19
UM3135
Schematic diagrams
3 Bill of materials
Table 2. STEVAL-IFP041V1 bill of materials
Item Q.ty Ref. Part/value Description Manufacturer Order code
1 8 C1 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
Vishay Vitramon HV1825Y472KXHATHV
5 2 C13 C26
0.1uF 0805
(2012 Metric)
100V 10%
CAP CER
0.1UF 100V
X7R 0805
Würth
Elektronik 885012207128
6 11
C14 C15 C16
C17 C18 C19
C20 C21 C22
C23 C24
100pF 0402
(1005 Metric)
10V 5%
CAP CER
100PF 10V
C0G/NP0 0402
Wurth
Electronics Inc. 885012005013
7 1 C25
2.2uF 0402
(1005 Metric)
10V 20%
CAP CER
2.2UF 10V X5R
0402
Wurth
Electronics Inc. 885012105013
8 5 CN1 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
UM3135
Bill of materials
UM3135 - Rev 1 page 9/19
Item Q.ty Ref. Part/value Description Manufacturer Order code
15 0 D2
BAT48JFILM
SC-76,
SOD-323
750mV @
200mA 350mA
(DC)
DIODE
SCHOTTKY
40V 350MA
SOD323 (not
mounted)
ST BAT48JFILM
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 1 D11
RED LED 0603
(1608 Metric)
20mA
LED RED
CLEAR 0603
SMD
Wurth
Electronics Inc. 150060RS75000
18 0 D12 ESDA7P60-1U1
M QFN-2L
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 2 J1 J2 JUMPER-con2-
strip-male
JUMPER-
CONN
HEADER .100
STR 2POS
Wurth
Electronics Inc. 61300211121
22 1 J3 con6-2x3-strip-
male
CONN
HEADER .100
DUAL STR
6POS
Wurth
Electronics Inc. 61300621121
23 1 J4 con6-2x3-strip-
male
CONN
HEADER .100
DUAL STR
6POS
Wurth
Electronics Inc. 61300621121
24 0 J5 JUMPER-con2-
strip-male
JUMPER-
CONN
HEADER .100
STR 2POS
Wurth
Electronics Inc. 61300211121
25 2 J6 J7 con8-2x4-strip-
male
CONN
HEADER VERT
8POS 2.54MM
Wurth
Electronics Inc. 61300821121
26 2 J9 J10 JUMPER-con2-
strip-male
JUMPER-
CONN
HEADER .100
STR 2POS
Wurth
Electronics Inc. 61300211121
27 11
R1 R2 R3 R4
R5 R6 R7 R8
R9 R10 R11
390 0402 (1005
Metric) 0.1W,
1/0W 5%
CHIP
RESISTOR
SMD 5% 1/0W
0402
Panasonic ERJH2GJ391X
28 8
R12 R13 R14
R20 R21 R22
R23 R24
22k 0603 (1608
Metric) 0.1W,
1/10W 1%
RES SMD 22K
OHM 1% 1/10W
0603
Yageo RC0603FR-0722KL
29 1 R17
390 0603 (1608
Metric) 0.1W,
1/10W 1%
RES SMD 390
OHM 1% 1/10W
0603
Yageo RC0603FR-07390RL
30 1 R15
1k 0603 (1608
Metric) 0.1W,
1/10W 1%
RES SMD 1K
OHM 1% 1/10W
0603
Yageo RC0603FR-071KL
UM3135
Bill of materials
UM3135 - Rev 1 page 10/19
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