EVAL Board ISO1H815G

February 2010
Application Note
AN-EVAL 2x8-ISO1H815G-1
Coreless Transformer Isolated
High Side Switch Evaluation Board
2 x 8 Channel 1.2A with ISO1H815G
Published by Infineon Technologies AG
http://www.infineon.com
Power Management & Drives
N e v e r
s t o p
t h i n k i n g
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
Table of Contents
Table of Contents .....................................................................2
Introduction...............................................................................3
Board Characteristics ..............................................................4
Functional Description ............................................................5
Connectors................................................................................8
Schematic..................................................................................9
PCB Layout and Assembly....................................................11
Bill of Material .........................................................................12
References ..............................................................................13
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Page 2 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
Introduction
Application
This Application Note describes a Demoboard with an isolated 2 x 8 Channel 1.2A Digital Output. The
®
board is designed to show the performance of the ISOFACE Part ISO1H815G providing an Isolated
Interface output to drive resistive, capacitive or inductive loads directly. The input can be driven by
applying 3.3V/5V CMOS compatible signals to connector K3 or using the On-Board DIP switches S1
and S2. The input operates in Micro Controller Mode by using Chip Select and Write Signals or in
Direct Control Mode by pulling these signals to GND and setting the Data Input D0 to D7. The Output
consists of 2 times 8 Channel High Side Switches with 1.2A Current rating. The Output is protected
with a channel selected over-temperature switch (to off).
Typical Application
ISO1H815G
The ISO1H815G is a galvanic isolated 8-bit data interface in P-DSO-36 package that provides 8 fully
protected high-side power switches that are able to handle currents up to 1.2A.
An 8-bit parallel microcontroller (µC) compatible interface allows connecting the IC directly to a µC
system. The input interface also supports a direct control mode and is designed to operate with
3.3V/5V CMOS compatible levels. The data transfer from input to output side is realized by the
integrated Coreless Transformer Technology.
The ISOface™ ISO1H815G includes 8 high-side power switches that are controlled by means of the
integrated parallel interface. The interface is 8-bit µC compatible. Furthermore, a direct control mode
can be selected that allows the direct control of the outputs OUT0...OUT7 by means of the inputs
®
D0...D7 without any additional logic signal. The ISOFACE can replace 8 optocouplers and the 8 highside switches in conventional I/O-Applications as galvanic isolation is implemented by means of the
integrated coreless transformer technology. The µC compatible interface allows a direct connection to
the ports of a microcontroller without the need for other components. Each of the 8 high-side power
switches is protected against short to Vbb, overload, over-temperature and against over-voltage by an
active zener clamp.
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Page 3 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
The diagnostic logic on the power chip recognizes the over-temperature information of each power
transistor. That information is sent via the internal coreless transformer to the pin DIAG at the input
interface.
Figure 1–
EVAL 2x8-ISO1H815G
Board Characteristics
Parameter
Min.
Max
Unit
3.0
5.5
V
K4 Jumper 1-2
8
12
V
K4 Jumper 2-3
11
45
V
-0.3
0.3xVCC
V
low level
0.7xVCC
VCC+0.3V
V
high level
Output Current Limit
1.4
4.5
A
Output Clamping Voltage
47
60
V
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Page 4 from 14
VCC Input Voltage
VBB Input Voltage
Input Signals
Remarks
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
Functional Description
Power Supply
The Demo Board contains 2 galvanic isolated voltage domains that are independent from each other.
The input interface is supplied by Pin1 and Pin14 of K3. Jumper K4 selects either direct supply with
3.3V/5V VCC (Jumper 1-2) or using the on-board 5V voltage regulator (Jumper 2-3). The output stage
is supplied at pin1 and 10 of K2, and K2 with Vbb voltage. The different voltage domains can be
switched on at different times. The output stage is only enabled once the input stage enters a stable
state.
Parallel Interface
The ISO1H815G contains a parallel interface that can be directly controlled by the microcontroller
output signals. The parallel interface can also be switched over to a direct control that allows direct
changes of the outputs OUT0 ... OUT7 by means of the corresponding inputs D0 ... D7 on the Demo
Board without additional logic signals. To activate the parallel direct control mode, both the /CS pin
and /WR pin must be connected to ground.
Direct Control Mode
VCC
VCC
VCC
CS
WR
P0
P1
P2
P3
P4
P5
P6
P7
On the Demo Board, this Mode can be easily
operated by using the DIP Switches S1 and S2.
GND
Controller
D0
D1
D2
D3
D4
D5
D6
D7
DIAG
Parallel Interface
Beside the use of the parallel µC compatible
interface, a parallel direct control mode can be
chosen. In this mode, the output OUT0...OUT7 can
be directly controlled via the inputs D0...D7 without
the need for additional logic signals. To activate this
mode, pin CS and WR must be connected to ground.
To activate the parallel direct control mode, both pins
/CS and /WR must be connected to ground.
Output
lines
GNDCC
IC1
Truth Table for manual DIP-switch control:
Input
Direct Control Mode
Output Disabled
Output
/DIS
/WRx
/CS
Dn
OUTn
H
L
L
H
ON
H
L
L
L
OFF
L
X
X
X
OFF
H = High Voltage Level; L = Low Voltage Level; X = Don’t Care;
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Page 5 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
µC Control Mode
/CS - Chip select. The system microcontroller selects the
ISO1H815G by means of the CS pin. Whenever the pin is in
a logic low state, data can be transferred from the µC.
/WR - Write. The system controller enables the write
procedure in the ISO1H815G by means of the signal WR. A
logic low state signal at pin WR writes the input data into
the input latches when the CS pin is in a logic low state.
D0…D7. The parallel input data is transferred to the input
latches with a high-to-low transition of the signal /WR (write)
while the /CS is logic low. Then a low-to-high transition of
/CS transfers the data of the input latches to the output
buffer.
VCC
VCC
AD0
WR
CS
WR
P0
P1
P2
P3
P4
P5
P6
P7
The µC Control Mode can be operated by connecting a
Processor Board to the corresponding Signals of Connector
K3.
D0
D1
D2
D3
D4
D5
D6
D7
Parallel Interface
VCC
Output
lines
DIAG
GND
GNDCC
µC (i.e
C166)
IC1
Truth Table for µC control:
Input
µC Control Mode
Output Disabled
Output
/DIS
/WR
/CS
Dn
OUTn
H
↑
↑
H
ON
H
↑
↑
L
OFF
L
X
X
X
OFF
H = High Voltage Level; L = Low Voltage Level; X = Don’t Care; ↑ = positive slope
Timing Diagram µC Control Mode:
/CS
/WR
D0...D7
DATA
Output
OUT0...OUT7
ton/off
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Page 6 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
Output Stage
Each channel contains a high-side vertical power FET that is protected by embedded protection
functions. The continuous current for each channel is 1.2A (all channels ON).
Each output is independently controlled by an output latch and a common reset line via the pin /DIS
that disables all eight outputs and reset the latches. A logic high input data bit turns the respective
output channel ON. A logic low data bit turns that output channel OFF.
Power Transistor Over-Voltage Protection
Each of the eight output stages has it own zener clamp that causes a voltage limitation at the power
transistor when inductive loads are switched off. VON is then clamped to 47V (min.).
Inductive and over-voltage output clamp (each channel)
Energy is stored in the load inductance.
EL= 1 / 2 x L x IL²
Inductive load switch-off energy dissipation (each channel)
While demagnetizing the load inductance, the energy dissipation in the DMOS with an approximate
solution for RL > 0 is:
Power Transistor Over-current Protection
The outputs are provided with a current limitation that enters a repetitive switched mode after an initial
peak current has been exceeded. The initial peak short circuit current limit IL(SCp) is set to a minimum of
1.4A at Tj = 125°C. During the repetitive mode, short circuit current limit IL(SCr) is set to 2.2A (typ.). If
this operation leads to an over-temperature condition, a second protection level (Tj > 135°C) will
change the output into a low Pulse-Width Modulated duty cycle (selective thermal shutdown with
restart) to prevent critical chip temperatures.
Common Diagnostic Output
The over-temperature detection information of the channels is OR-wired in the common diagnostic
output block. The information is send via the integrated coreless transformer to the input interface. The
output stage at pin DIAG has an open drain functionality combined with a current source. The red LED
D20 and D21 show the current state of the DIAG output.
LED ON: one of the Channels has over-temperature or the VBB Supply is below the operating
range
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Page 7 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
Connectors
K1, K2:
1
2
3
4
5
6
7
8
9
10
K1
VBB1
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
OUT16
OUT17
GNDbb1
K2
VBB2
OUT20
OUT21
OUT22
OUT23
OUT24
OUT25
OUT26
OUT27
GNDbb2
K3:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
+Vin/VCC
/DIS
/CS
/WR1
/WR2
D0
D1
D2
D3
D4
D5
D6
D7
GNDCC
Note: When you are using connector K3 for applying Micro Controller Signals to the Board, make sure that all DIP Switches
are in “High” state!
K4:
Jumper 1 - 2
Jumper 2 - 3
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VCC 3,3V/5V
Vin 8V …12V
Page 8 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
Schematic
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Page 9 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
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Page 10 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
PCB Layout and Assembly
Board Layout - Component Side
Board Layout - Bottom Side (mirror view)
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Page 11 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
Bill of Material
Nr.
Quant.
1
5
2
3
4
2
2
2
5
16
6
8
7
1
Position
C1, C4, C6, C7,
C8
C36, C37
C9, C10
C3, C35
C11, C12, C13,
C14, C15, C16,
C17, C18, C23,
C24, C25, C26,
C27, C28, C29,
C30
C19, C20, C21,
C22, C31, C32,
C33, C34
C5
Value
Package
100nF, 50V
0805
1uF, 50V
10uF, 50V
10uF, 10V
0805
SMD_E
0805
10nF, 50V
0805
4,7nF, 500V
1206
10uF, 25V
SMD_B
LED gn
P-LCC-2
8
16
D1, D2, D3, D4,
D5, D6, D7, D8,
D9, D10, D11,
D12, D13, D14,
D15, D16
9
10
11
12
13
14
15
2
1
2
2
1
2
2
D20, D21
D17
D18, D19
F1, F2
IC1
IC2, IC3
K1, K2
LED rt
LL4148
SM15T39A
OMF125, 10A
TLE4264
ISO1H815G
Terminal 10pol.
P-LCC-2
MM
SMC
SMD-D/E
SOT-223
P-DSO36
RM5,08
16
1
K3
Connector 14pol.
RM2,54
17
1
K4
Connector 3pol.
RM2,54
18
16
R1, R2, R3, R4,
R5, R6, R7, R8,
R9, R10, R11,
R12, R13, R14,
R15, R16
10k
1206
19
20
21
22
23
24
25
26
27
2
2
1
1
1
1
1
4
1
4,7k
0R
Winet 8x4,7k
Winet 5x4,7k
DIP-Switch 4
DIP-Switch 8
Jumper
Spacer
Print Board
1206
805
9-SIL-1
6-SIL-1
DSS-04
DSS-08
R17, R18
R20, R25
RN1
RN2
S1
S2
K4
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Page 12 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
References
[1]
ISO1H815G Coreless Transformer Isolated Digital Output 8 Channel 1.2A
High Side Switch, Data Sheet, Infineon Technologies
www.Infineon.com
Page 13 from 14
EVAL 2x8-ISO1H815G
V1.1
2 x 8 Channel 1.2A Evaluation Board with ISO1H815G
Change service
Revision History
Application Note EVAL2x8-ISO1H815G-1
Actual Release: V1.1 Date:15.02.2010
Previous Release:
Page of
Page of
Subjects changed since last release
actual
prev. Rel.
Rel.
11
---------- First Issue
For questions on technology, delivery and prices please contact the Infineon
Technologies Offices in Germany or the Infineon Technologies Companies and
Representatives worldwide: see the address list on the last page or our webpage at
http://www.infineon.com
Edition 2006-08-28
Published by Infineon Technologies AG,
Am Campeon 1-12,
85579 Neubiberg, Germany
© Infineon Technologies AG 2/15/10.
All Rights Reserved.
Attention please!
The information herein is given to describe certain components and shall not be considered as a
guarantee of characteristics.
Terms of delivery and rights to technical change reserved.
We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement,
regarding circuits, descriptions and charts stated herein.
Information
For further information on technology, delivery terms and conditions and prices please contact your
nearest Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements components may contain dangerous substances. For information on
the types in question please contact your nearest Infineon Technologies Office.
Infineon Technologies Components may only be used in life-support devices or systems with the
express written approval of Infineon Technologies, if a failure of such components can reasonably be
expected to cause the failure of that life-support device or system, or to affect the safety or
effectiveness of that device or system. Life support devices or systems are intended to be implanted in
the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is
reasonable to assume that the health of the user or other persons may be endangered.
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Page 14 from 14
EVAL 2x8-ISO1H815G
V1.1