AN4284
Application note
STEVAL-IFP022V1 demonstration board for
the VNI8200XP octal high side driver
By Massimo Oteri
Introduction
The STEVAL-IFP022V1 is a demonstration board for the IPS VNI8200XP, a monolithic 8channel high side driver featuring very low supply current, with an integrated SPI interface
and a high efficiency 100 mA micropower step-down switching regulator.
The STEVAL-IFP022V1 provides a 4-row, 2-column LED matrix, allowing detection of the
status of each output line. The LED matrix is supplied by the step-down regulator integrated
in the VNI8200XP device. The same integrated regulator supplies the external high-speed
opto-couplers, which provide the isolated interface required by industrial standards between
the IPS and the host controller.
Optimized thermal performance is provided by the four layer structure of the board. In fact,
four dedicated copper areas on each of the four layers result in improved sharing of power
dissipation.
The STEVAL-IFP022V1 meets EFT standard requirements IEC 61000-4-2, IEC 61000-4-4,
and IEC 61000-4-5.
The STEVAL-IFP022V1 can be controlled by a dedicated GUI for Windows operating
systems, providing a complete user-friendly interface. To use the GUI, it is necessary to
connect the communication board STEVAL-PCC009V2 between the STEVAL-IFP022V1
demonstration board and the PC.
Figure 1. STEVAL-IFP022V1 demonstration board
June 2013
DocID024441 Rev 1
1/19
www.st.com
Contents
AN4284
Contents
1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Demonstration board characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1
Power section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2
Step-down converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3
Digital interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3.1
Parallel interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3.2
SPI communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4
Thermal management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
3.5
EMC robustness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4
PC communication using STEVAL-PCC009V2 connection and HSD GUI
interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5
Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6
Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2/19
DocID024441 Rev 1
AN4284
1
Features
Features
•
Operating voltage from 10.5 to 33 V
•
0.7 A for each channel
•
Reverse polarity protection
•
High speed opto-isolation for SPI and parallel communication
•
Low speed opto-isolation for device fault signaling
•
Step-down converter for 3.3 V or 5 V
•
Digital supply voltage
•
LED matrix for channel status signaling
•
Microcontroller interface
•
Designed to meet EMC standard requirements: IEC 61000-4-2, IEC 61000-4-4, and
IEC 61000-4-5
Figure 2. STEVAL-IFP022V1 demonstration board
DocID024441 Rev 1
3/19
Demonstration board characteristics
2
AN4284
Demonstration board characteristics
Figure 3. Schematic diagram - interface section
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AN4284
Demonstration board characteristics
Figure 4. Schematic diagram - power section
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Table 1 summarizes the connectors and jumpers on the board which can be used for device driving.
Table 1. STEVAL-IFP022V1 connector and jumper description
Name
Type
Function
J6
Drop jumper
Drop jumper to select parallel or SPI
interface
CN2
Digital supply
External 3.3 - 5 V supply
CN1
Power supply
Supply voltage
JP2,JP3,JP4,JP5,JP6
Drop jumpers
Drop jumper to select external
reference or µC driving
JP7
Drop jumper
DC-DC disable
JP8
Drop jumper
DC-DC 5 V regulation
CN3
Power outputs
Device power outputs
CN4
30-pin connector
Microcontroller interface
DocID024441 Rev 1
5/19
Demonstration board characteristics
AN4284
Table 2. STEVAL-IFP022V1 30-pin signal connector description
Pin number
1
3.3 V communication board digital output voltage
2
GND reference
3
Parallel Input pin IN1
4
Parallel input pin IN2
5
Parallel input pin IN3
6
Parallel input pin IN4
7-12
NC
13
GND reference
14
Vdd
15
SPI device data out/parallel input 8
16
SPI CLK/ parallel input 6
17
SPI device data in/parallel input 5
18
Chip select/parallel input 7
19
Fault feedback for improper communication or thermal junction protection
intervention
20
Power Good feedback
21
Thermal case feedback information
22
Not used
23
NC
24,25
Reserved
26,27
NC
28
29,30
6/19
Description
GND reference
NC
DocID024441 Rev 1
AN4284
3
PCB layout
PCB layout
Figure 5. STEVAL-IFP022V1: component placement
Figure 6. STEVAL-IFP022V1: top side layout
DocID024441 Rev 1
7/19
PCB layout
AN4284
Figure 7. STEVAL-IFP022V1 internal layer 1
Figure 8. STEVAL-IFP022V1 internal layer 2
8/19
DocID024441 Rev 1
AN4284
PCB layout
Figure 9. STEVAL-IFP022V1: bottom side layout
DocID024441 Rev 1
9/19
PCB layout
3.1
AN4284
Power section
For proper handling, is recommended to set the main voltage within a range of 18 V to 33 V
to prevent overheating of the Transil diode due to high reverse voltage. Digital supply
voltage could be provided using the on-board DC-DC converter or using CN2 connector.
This demonstration board also provides reverse polarity protection implemented by a
Schottky diode and surge protection implemented using a Transil diode with 45 V clamp
voltage.
Table 3. STEVAL-IFP022V1 electrical specifications (recommended values)
Parameter
Test Condition
Typ
Unit
VCC
Main supply voltage
24
V
Vreg
Digital voltage supply
5
V
mA
Current consumption
DC/DC OFF Vreg = 5 V SPI OFF channel OFF
5
IVcc
DC/DC ON Vreg = 5 V SPI ON channel OFF
15
mA
Vclamp
Supply voltage clamp
48
V
Thermal resistance
15
°C/W
Rth
3.2
Description
Step-down converter
The step-down converter has been designed to generate a regulated voltage of 3.3 V/5 V to
supply internal circuitry, the opto-coupler and other VNI8200XP devices if necessary (if this
latter configuration is used, diode D1 must be bypassed). To set regulated voltage, the drop
jumper JP8 must be left open to obtain 3.3 V regulation, and closed to obtain 5 V regulation.
Instead, to turn on or turn off the DC-DC converter it is necessary to close JP7 on the
related side; moreover, in case of 3.3 V regulation the jumper JP12 has to be closed. At test
point TP1, it is possible to check the regulated voltage.
3.3
Digital interface
The STEVAL-IFP022V1 provides the possibility to perform device driving using parallel
communication or synchronous communication with a maximum speed of 4.5 MHz, through
a 30-pin connector. In the following paragraphs, the steps required to properly manage the
evaluation tool will be described in greater detail.
3.3.1
Parallel interface
To select the parallel interface, the drop jumper JP6 should be left open, whereas JP10 has
to be soldered on the side identified with the label “IN8”. After this step, it is possible to
manage all signals for parallel communication using the 30-pin connector. In parallel
configuration, the input pin connected to drop jumpers JP2, JP4, JP5 and JP3 could be
managed by a microcontroller or kept fixed to a reference. Leaving drop jumpers open, the
correspondent input is pulled down, while soldering on the other reference it is possible to
always have a high input, or in case of a WD signal, the possibility to provide a square wave
at different periods.
10/19
DocID024441 Rev 1
AN4284
3.3.2
PCB layout
SPI communication
To select SPI communication, the drop jumper JP6 has to be closed, whereas the two drop
jumpers identified with labels JP10 and JP9, must be soldered on the side identified with the
label “SDO”.
In this mode, the watchdog reset function is available.
This functionality can be controlled by a microcontroller by soldering drop jumpers JP3 and
JP4 on side with the label “µC”, or may be control externally by soldering JP3 and JP4 on
the opposite side, fixing these signals to another reference.
Regarding the other two drop jumpers “OUT_EN” and “SEL1”, the same considerations as
those explained above are valid.
3.4
Thermal management
Improvement in thermal management has been achieved by distributing the power
dissipation on VCC using four layer realization. This solution permits to reach a Rth value
equal to 15 °C/W with around 16 cm ^2 copper area on the bottom layer, around 6 cm ^2 on
each of the other layers. The copper thickness is 70 um.
3.5
EMC robustness
The STEVAL-IFP022V1 satisfies all requirements established by IEC 61000-4-2, IEC
61000-4-4, and IEC 61000-4-5, respectively, for ESD (Air discharge and Contact
Discharge), Burst on outputs and supply line and Surge tests on output and supply line.
DocID024441 Rev 1
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PC communication using STEVAL-PCC009V2 connection and HSD GUI interface
4
AN4284
PC communication using STEVAL-PCC009V2
connection and HSD GUI interface
As described in the previous section, this demonstration board is populated with a 30-pin
connector to provide easy microcontroller interfacing, which is represented by STEVALPCC009V2.This board, through a GUI interface permits STEVAL-IFP022V1 communication
and driving in parallel mode as well as serial mode.
Figure 10. GUI interface SPI 16-bit communication
Figure 11. GUI interface parallel communication
12/19
DocID024441 Rev 1
AN4284
5
Bill of material
Bill of material
Table 4. Bill of material - interface section
Components
Description
Type
Part number
Manufacturer
C1, C2, C3, C4, C5
100 nF/10 V
Ceramic SMT 0603
GRM188R71H104JA93D
Murata
C6
NC
Ceramic SMT 0603
GRM188R71H104JA93D
Murata
J1
CON30
30-pin connector
J2
IN8
Drop jumper
J3
SDO
Drop jumper
R1, R2, R3, R4, R5,
R6, R7, R8, R9,
150R
R10, R11, R12, R13,
R14, R15, R17
Resistor
R16
12K4
Resistor
R23, R24, R25,
4K7
Resistor
R26
NC
Resistor
R18
18K2
Resistor
R19
27K4
Resistor
R20
11K3
Resistor
R21
0R
Resistor
R22
0R
Resistor
R27, R28, R29
350R
Resistor
U1, U2, U3, U4
ACPL-K73L-000E
Opto-coupler SMD
ACPL-K73L-000E
Avago
Technologies
U5
ACPL- W070L000E
Opto-coupler SMD
ACPL-W070L-000E
Avago
Technologies
U6
TLP281
Opto-coupler SMD
TLP281-4
Toshiba
Table 5. Bill of material - power section
Components
Description
Type
Part number
Manufacturer
D4, D5, D6, D7, D8,
Green LED
D9, D10, D11
LED SMD
C7
100 uF/50 V
Electrolytic capacitor
EEEFP1H101AP
Panasonic
C8,C9
4.7 nF Y1 /
4 kV 500 Vac
Ceramic single layer
VY1472M63Y5UQ6*V0
Vishay
C15
1 uF/50 V
Ceramic SMT
GRM31MR71H105KA88L
Murata
C10
1 uF/50 V
Ceramic
C11, C12, C13, C14,
100 pF/10 V
C16,
Ceramic
DocID024441 Rev 1
13/19
Bill of material
AN4284
Table 5. Bill of material - power section (continued)
Components
Description
Type
Part number
Manufacturer
C17
3.3 pF/10 V
Ceramic
C18, C19, C21,
C23, C24, C25,
C26, C27, C28
22 nF/50 V
Ceramic
C20, C29, C30
4.7 pF/10 V
Ceramic
C22
100 nF/10 V
Ceramic
C31
4.7 uF/10 V
Ceramic SMT
C32, C33, C34
10 nF/10 V
Ceramic
C35
100 pF/50 V
Ceramic
D1,D3
STPS1L60A
Schottky diode SMD
ST
D2
STPS1H100A
Schottky diode SMD
ST
D12, D13, D14
RED LED
LED SMD
CN2
Extreg
2-way screw
connector
CN1
VCC
2-way screw
connector
JP2
OUT_EN
Drop jumper
JP3
WD
Drop jumper
JP4
WD_EN
Drop jumper
JP5
SEL1
Drop jumper
JP6
SEL2
Drop jumper
CN3
CON8
8-way screw
connector
J8
5V
Drop jumper
J7
DC-DC
Drop jumper
JP11
GND_DISC
Drop jumper
JP12
3V3
Drop jumper
L1
100 uH/0.7R
Is > 700 mA
Inductor
R30, R32, R34,
R36, R38, R46,
R47, R48, R49
10 k
Resistor
R31, R33, R35,
R37, R39,
270R
Resistor
R40, R41, R42, R43 100R
Resistor
R56
8k
Resistor
R44
10 k 1%
Resistor
R45
1k47 1%
Resistor
14/19
GRM21BR71A475KA73L
LQH6PPN101M43L
DocID024441 Rev 1
Murata
Murata
AN4284
Bill of material
Table 5. Bill of material - power section (continued)
Components
Description
Type
Part number
Manufacturer
C17
3.3 pF/10 V
Ceramic
C18, C19, C21,
C23, C24, C25,
C26, C27, C28
22 nF/50 V
Ceramic
C20, C29, C30
4.7 pF/10 V
Ceramic
C22
100 nF/10 V
Ceramic
C31
4.7 uF/10 V
Ceramic SMT
C32, C33, C34
10 nF/10 V
Ceramic
C35
100 pF/50 V
Ceramic
D1,D3
STPS1L60A
Schottky diode SMD
ST
D2
STPS1H100A
Schottky diode SMD
ST
D12, D13, D14
RED LED
LED SMD
CN2
Extreg
2-way screw
connector
CN1
VCC
2-way screw
connector
JP2
OUT_EN
Drop jumper
JP3
WD
Drop jumper
JP4
WD_EN
Drop jumper
JP5
SEL1
Drop jumper
JP6
SEL2
Drop jumper
CN3
CON8
8-way screw
connector
J8
5V
Drop jumper
J7
DC-DC
Drop jumper
JP11
GND_DISC
Drop jumper
JP12
3V3
Drop jumper
L1
100 uH/0.7R
Is > 700 mA
Inductor
R30, R32, R34,
R36, R38, R46,
R47, R48, R49
10 k
Resistor
R31, R33, R35,
R37, R39,
270R
Resistor
R40, R41, R42, R43 100R
Resistor
R56
8k
Resistor
R44
10 k 1%
Resistor
R45
1k47 1%
Resistor
GRM21BR71A475KA73L
LQH6PPN101M43L
DocID024441 Rev 1
Murata
Murata
15/19
Bill of material
AN4284
Table 5. Bill of material - power section (continued)
Components
Description
Type
R50
2k37 1%
Resistor
R51, R52
115R
Resistor
R53, R54, R55
470R
Resistor
R57
33 k
Resistor
TP1
Vreg
Test point 1 mm
TP2
SDI
Test point 1 mm
TP3
CLK
Test point 1 mm
TP4
SS
Test point 1 mm
TP5
SDO
Test point 1 mm
TP7
WD
Test point 1 mm
TRS1
SM15T33CA
Transil
U7
VNI8200XP
16/19
Part number
Manufacturer
ST
ST
DocID024441 Rev 1
AN4284
6
Reference documents
Reference documents
•
VNI8200XP datasheet
•
IEC 61000-4-4 standard
•
IEC 61000-4-5 standard
•
IEC 61000-4-2 standard
DocID024441 Rev 1
17/19
Revision history
7
AN4284
Revision history
Table 6. Document revision history
18/19
Date
Revision
24-Jun-2013
1
Changes
Initial release.
DocID024441 Rev 1
AN4284
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DocID024441 Rev 1
19/19