Evaluation Board EVAL-1EDI60I12AF

Eice DR IV ER ™
High voltage gate driver IC
E valu atio n B oar d
EV AL -1 E DI6 0I1 2A F
Applic atio n N ote
Revision 1.0, 2014-07-25
Indust rial Po wer C o ntrol
Edition 2014-08-05
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2014 Infineon Technologies AG
All Rights Reserved.
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For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Revision History: 2014-06 Rev.1.0
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Subjects (major changes since last revision)
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Last Trademarks Update 2011-11-11
Revision 1.0, 2014-07-25
EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Table of Contents
1
2
2.1
2.2
2.3
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
4
5
6
Introduction ..................................................................................................................... 5
Design features ............................................................................................................... 6
Main features ........................................................................................................... 6
Main specifications .................................................................................................. 7
Pin assignment ........................................................................................................ 8
Electrical features............................................................................................................ 9
+5V and +15V supply voltages ................................................................................ 9
Under voltage lockout .............................................................................................. 9
Short circuit detection .............................................................................................. 9
Current sense amplifier ......................................................................................... 11
IGBT turn  on / off ................................................................................................ 12
DC-Link capacitors ................................................................................................ 13
Input PWM-Signals ................................................................................................ 14
Separation between input and output side ............................................................ 14
Schematics ................................................................................................................... 15
Layout ........................................................................................................................... 17
Bill of material ............................................................................................................... 18
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Introduction
1
Introduction
The gate driver evaluation board EVAL-1EDI60I12AF was developed to demonstrate the functionalities and key
features of Infineon’s IGBT gate driver 1EDI60I12AF.
The board is available from Infineon in sampling quantities. Main features of this board are described in the
datasheet chapter of this document, whereas the remaining paragraphs provide information intended to enable
the customer to copy, modify and qualify the design for production, according to their own specific requirements.
The design of the EVAL-1EDI60I12AF was performed with respect to the environmental conditions described in
this document. The design was tested as described in this document, but not qualified regarding manufacturing,
lifetime or over the full range of ambient operating conditions.
The boards provided by Infineon are subjected to functional testing only.
Due to their purpose Evaluation Boards are not subjected to the same procedures regarding Returned Material
Analysis (RMA), Process Change Notification (PCN) and Product Discontinuation (PD) as regular products. The
Evaluation Boards are intended for development support only and should not be used directly as reference
designs for volume production.
See Legal Disclaimer and Warnings for further restrictions on Infineon’s warranty and liability.
Application Note
5
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Design features
Design features
2
This chapter provides an overview of the main features, the main specifications and pin assignments as well as
mechanical dimensions.
2.1
Main features
Figure 2-1:
Top view of the EVAL-1EDI60I12AF
The EVAL-1EDI60I12AF contains two Infineon 1EDI60I12AF single channel IGBT gate driver ICs and two
Infineon IGBTs IKW50N65F5.
The major features of the evaluation board are:

Short circuit protection

Current measurement

Under voltage lock-out

Bootstrap functionality for the high side gate driver

Possibility of separating input and output side
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Design features
Status LED Over Current / Ready
Control interface
Figure 2-2:
2.2
Reset
Isolated gate drivers
5V supply input
Optocoupler
Current amplifier
Jumpers to separate input and output side
DC-link Capacitors
15V supply input
IGBTs
5V voltage regulator
PCB overview
Main specifications
All values listed in the table below are values determined at an ambient temperature of 25°C.
Table 2-1
Parameter
Description
Min.
VCC
15V supply
13.2
VDC
High voltage supply*
IOut,pk
Single pulse peak output current
IOut,rms
RMS output current**
fp
Switching frequency
Note: Please make sure, never to exceed the maximum rated values. Also the
be guaranteed when using the board with all parameters at maximum
Typ.
Max.
Unit
15
17.5
V
400
500
V
40
A
10
A
50
100
kHz
performance and quality cannot
rated values at the same time.
*
High voltage supply is limited by the IGBTs used and the DC link capacitors. If higher supply voltage is
required, these parts should be replaced by parts with a higher voltage rating. The gate drivers are
capable of operating up to peak voltage levels of 1200V. However, note that the board’s layout was not
tested for voltages exceeding 600V.
**
Use of an appropriate heat sink for IGBT devices should be considered in case of continuous operation
with currents higher than approximately 2Arms.
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Design features
2.3
Pin assignment
Table 2-2 summarizes the connections and pins of the board with all references correlated to the overview given
in Figure 2-2.
Table 2-2
Connector name
Pin Position
Pin name
Description
RESET
Left terminal
Right terminal
/RST
GND
same as X1-B1
same as X1-A16
+5V (VCC1)
Right terminal
Left terminal
+5V
GND
positive 5V supply
5V power supply necessary if input and output side
are separated
+15V (VCC2)
Left terminal
Right terminal
+15V
GND
positive 15V supply
A16
B1
B2
B7
GND
/RST
/FLT
IN_T
B8
IN_B
B16
VCC
reference for power supplies and input signals
Reset input, 0V for circuit reset
Over current output; OC, 0V / 5V
non-inverting input high-side IGBT;
0V off; 5V on
non-inverting input low-side IGBT;
0V off; 5V on
positive 5V supply
X1
reference for high voltage supply
Power-GND internally connected to GND
positive high voltage supply
up to 500V referenced to GND_HV
GND_HV
V+HV
HB_OUT
Output HV half bridge related to GND_HV
C_OUT
Output filter bulk capacitors center tap
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Electrical features
3
Electrical features
3.1
+5V and +15V supply voltages
The driver’s high side voltage has to be supplied externally. The 5V supply voltage, required for on board
circuits, is generated internally by an Infineon voltage regulator. The evaluation board does not provide an over
voltage supply monitoring, therefore the user has to ensure, that the voltages remain within the correct range.
Voltages exceeding the maximum values may lead to damage of the IGBT drivers and other circuitries.
The +5V supply is generated on the board by using the Infineon voltage regulator TLE4264G. The regulator is
used to supply input as well as output circuits of the evaluation board. In case a complete input to output
separation is required, the supply voltage must be provided externally.
The availability of the supply voltages is individually indicated for both power supplies via the green status
LEDs. For proper operation of the evaluation board, care has to be taken that both power supplies are available
and stable.
The output part of the high-side gate driver is supplied by bootstrap using an external ultra-fast diode. To ensure
that the bootstrap capacitor is charged before the high side IGBT is switched on, the low side IGBT has to be
switched on for at least 250µs.
3.2
Under voltage lockout
The +15V supply as well as the +5V supply are monitored by the 1EDI60I12AF gate drivers. In case of an under
voltage, the driver’s output is switched off until both input voltages are higher than the required thresholds.
The thresholds for the +5V supply typically are VCCUV+ = 2.85 V on a positive slope and VCCUV– = 2.75 V on a
negative slope.
The thresholds for the +15V supply typically are VBSUV+ = 12 V on a positive slope and
VBSUV– = 11.1 V on a negative slope.
3.3
Short circuit detection
The 1EDI60I12AF evaluation board provides short circuit detection by measuring the voltage drop across a
5mΩ shunt as depicted in Figure 3-1. This voltage drop is compared to a fixed voltage level of 254.5mV by the
comparator circuit sketched in Figure 3-2. If the current reaches a value of typ. 50A, a short circuit is detected
and the gate driver inputs HIN and LIN are disabled. IN inputs are pulled high which means that PWM signals
at IN+ have no effect and the driver outputs are switched off. This state is reported by the OC LED. The OC
event is latched by the on-board flip-flop circuit as given in Figure 3-3 and must be reset by switching the
RESET signal to ground. As can be seen in Figure 3-2, the fault signal is fed from the output part of the board to
the input part utilizing an optocoupler. This allows operating the over-current protection circuit even if the input
to output separation of the board is used.
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Electrical features
Figure 3-1:
Shunt - R19- connection in the power circuit
Figure 3-2:
Over current comparator circuit and Error signaling
Figure 3-3:
Fault flip-flop latch circuit
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Electrical features
Figure 3-4 includes the signals of the low-side driver along with current and voltages for the IGBT during short
circuit with 20µH inductor connected between HB_OUT and V+HV.
VIP_F reached Vcomp_threshold
due to over current event
VCE_bot
Output switched off
VCE_bot
VGE_b
ot
VIP_F
Vcomp_thersh
Iload
old
VGE_b
VIP_
ot
F
_bot
Figure 3-4:
Detection signals, IGBT collector current, Gate- and Collector-Emitter voltage during short
circuit event
The experiment reveals a delay of approximately 2.8µs between the overcurrent detection and the output being
switch off. During this delay time, the current continues to rise until the IGBT switches off. Depending on the
inductance of the short circuit loop, the current may rise to rather high values which should be considered when
using the test board in connection with sensitive loads, respectively other external circuits.
3.4
Current sense amplifier
The EVAL-1EDI60I12AF provides an operational amplifier which amplifies the voltage drop across the shunt
with a gain of 11. The amplified voltage is available to the user at connector X1 pins A9 and B9. Figure 3-5
holds the schematic details of the amplifier setup.
Figure 3-5:
Current sense amplifier
The amplified voltage as a function of load current results to be:
Vcurrent_ amp _ out  Rshunt  I shunt  11 .
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Electrical features
The scope plot in Figure 3-6 gives an insight to the amplifier’s output.
VCE_bot
IC
VGE_b
ot
Figure 3-6:
3.5
Vcurrent_amp_ou
IC = 60A
t
Vcurrent_amp_out = 60A · 5mΩ · 11 =3.3V
Current sense amplifier output and corresponding load current
IGBT turn  on / off
The 1EDI60I12AF provides separate driver source output and driver sink output signals. These allow
independent control of IGBT turn-on respectively turn-off behavior. It can be seen in Figure 3-1Figure 3-7 that
the evaluation board is equipped with independent gate resistors RG1B, RG1T, RG2B and RG2T. The resistors
used in default configuration have a value of 27. The values can be modified by the user in order to obtain a
required switching behavior. It should be noted that the deviation from the default values may result in increased
switching noise or higher switching losses. Examples of switching transients with default gate resistors
determined in a double pulse test are depicted in Figure 3-7.
Switching sequence with 2 pulses:
Supply Input: 400V
Switching frequency = 50 kHz
Duty cycle = 50%
VCE_bot
VGE_bot
VGE_top
Iload
Dead time = 1.5 s
500µH inductor connected between HB_OUT and
V+HV
CH1 VGE_bot 5V/div
CH3 VGE_top 5V/div
Time 4µs/div
Figure 3-7:
CH2 VCE_bot 100V/div
CH4 Iload 4A/div
Example of waveforms during double pulse switching sequence
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Electrical features
A more detailed view to the transient switching behavior is given in Figure 3-8.
Iload
VGE_bot
VCE_bot
VCE_bot
VGE_top
VGE_top
a)
Figure 3-8:
3.6
VGE_bot
Iload
b)
Switching transients; a) turning off the low-side IGBT and turning on the high-side IGBT
b) vice versa, time scale is 200 ns/div
DC-Link capacitors
The evaluation board provides a split DC-Link capacitor in order to enable connection of loads which require ac
voltages and bi-directional currents. In such a case, the load can be connected between HB_OUT and C_OUT
output which enables voltage inversion across the load. An example of possible bi-directional waveforms is
displayed in Figure 3-9. It should be noted, that in case of operation with bi-directional currents, the current
amplifier output only provides information about the current through the low-side IGBT. In addition to that, the
overcurrent protection circuit may not work properly in case of large negative current shifts. In case of
symmetrical current waveforms, the overcurrent protection should not be affected but it should be noted that an
overcurrent would be detected only on the positive part of the current waveform.
Due to the available space, only rather small DC-Link capacitors of 330nF are available on the board. If a larger
DC-Link capacity is necessary, it has to be connected to the connectors V+HV, GND_HV and C_OUT
externally.
Iload
VGE_bot
Figure 3-9:
VCE_bot
VGE_top
Example of an operation with bi-directional load current
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Electrical features
3.7
Input PWM-Signals
Figure 3-10: Details of the 1EDI60I12AF gate driver input schematic
There is a possibility to use low-pass filters inside the PWM input signals to avoid a turn-on of an IGBT by noise.
This feature is not used in this evaluation board due to internal signal filtering of the driver’s inputs which are
sufficient in most applications. However, there is the possibility to test this feature by changing the resistors
RIN1T, RIN1B and using a suitable capacitance value for the capacitors CIN1T, CIN1B as seen in Figure 3-10.
3.8
Separation between input and output side
The 1EDI60I12AF gate driver offers an input to output isolation capability of 1200V. The evaluation board takes
advantage of this feature by offering a possibility of input to output separation. This can be done by removing
the jumpers marked JP4 on the board as indicated in Figure 3-11. This removes all conductive connections
between the input and output side and therefore completely separates the two sides. This procedure also opens
the connection between the 5V onboard voltage regulator and the input side circuits. Thus, the +5V for the input
side must be supplied from an external, isolated source. In addition to that, the removal of the jumpers opens
the connection between the current amplifier output and the connector X1 and therefore the information about
the current is not available in case of isolated operation. The overcurrent protection remains functional since the
fault signal is fed back to the input side via an optocoupler.
It should be noted that in case of operation without this separation and all jumpers in place, the board requires
the +15V supply only.
Separation between input and output
side
Optocoupler
Jumpers
Figure 3-11: Jumpers and optocouplers enabling operation with input to output separation
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Schematics
4
Schematics
To ease reproduction of the board for further use, Figure 4-1 to Figure 4-7 display the detailed schematic of the
evaluation board.
Figure 4-1:
HV supply input and DC-Link capacitors
Figure 4-2:
LV Supplies and Reset Input
Figure 4-3:
5V voltage regulator and power supply status LEDs
Figure 4-4:
Communication interface  connector X1
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Schematics
Figure 4-5:
Infineon gate drivers 1EDI60I12AF with necessary external components
Figure 4-6:
Current sense amplifier and over current comparator
Figure 4-7:
OC and READY LEDs, FAULT and over current logic
Application Note
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EiceDRIVER™ Driver IC evaluation board
EVAL-1EDI60I12AF Application Note
Layout
5
Layout
As a basis to start a dedicated development, Figure 5-1 to Figure 5-3 include the layout of the PCB-layers and
the component placement view.
Figure 5-1:
Top-Layer of the EVAL-1EDI60I12AF Layout bottom
Figure 5-2:
Bottom Layer of the EVAL-1EDI60I12AF
Figure 5-3:
Top placement view of the EVAL-1EDI60I12AF
Application Note
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EVAL-1EDI60I12AF Application Note
Bill of material
Bill of material
6
Table 6-1
Part
+5V, +15V, RESET
GND_HV, HB_OUT,C_OUT, V+HV
5V, 15V
OC
READY
X1
JP1, JP2, JP3
R2B, R2T
R1B, R1T
R9
R15, R17, R18, RIN1B, RIN1T
R8
R1, R2, R6
R13, R14
R10
R3, R4, R5
R12, R16
R11
R7
RL5
RL6
RL1, RL2
RL3, RL4
RG2B, RG2T
RG1B, RG1T, RBOOT
R19
CIN1B, CIN1T
C5, C6
C1B, C1T, C2, C4, C7,C10
C1
C2B, C2T, C8, C9
CGE_B, CGE_T
C3
C_BULK_B, C_BULK_T
D1
DBOOT
IC1, IC2
IC3
IC4
IC5
OK1
IGBT_BTM, IGBT_TOP
T1, T2, T3, T4
T5
Application Note
Value
22-23-2021
MKDSN1,5/2-5,08
LED_GN
LED_RT
LED_GE
FAB32Q2
JP1
n.a.
0R
820R
1k
3k
3k3
4k7
10k
15k
47k
56k
1M
270R
820R
1k
7k5
3R3
10R
R005
n.a.
100pF/10V
100nF/10V
1uF/10V
4u7F/25V
n.a.
100uF/16V
B32522N6334J
BAT165
MURS160
1EDI60I12AF
LMV331IDBVTG4
TLE4264G
LMV721M5
SFH6186-2
IKW50N65F5
BC848A
BCR108W
18
Package
22-23-2021
MKDSN1,5/2-5,08
CHIPLED_0805
CHIPLED_0805
CHIPLED_0805
FAB32Q2
Jumper
SMD0603
SMD0603
SMD0603
SMD0603
SMD0603
SMD0603
SMD0603
SMD0603
SMD0603
SMD0603
SMD0603
SMD0603
SMD0805
SMD0805
SMD0805
SMD0805
SMD1206
SMD1206
R2512
SMD0603
SMD0603
SMD0603
SMD0805
SMD1206
SMD1206
EEEFK1C101P
330nF/450V
SOD323F
SMB
SO08
SOT23-5
SOT223
SOT23-5
SMD4-7
TO247BH
SOT23
SOT323
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