National Instruments ISO5851, User Manual

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(As Shipped)
10 :
R3
R12
D4
OUT
Turnon/Turnoff
is Same
10
:
10 :
R3
R12 D4
OUT
To Change
Turnon and Turnoff
by R3 and R12
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Printed-Circuit Board
4.1.1.2 Control and Status
The interface to the device is via the JMP1 header. It contains the IN+ and IN– inputs, the device RST,
RDY, and FLT indicator output. The JMP1 header allows easy connections to test equipment using
standard clip leads. Each of the five signals also has a test point for additional connections. These are test
points TP1–TP5.
4.1.2 Right-Side Operation
4.1.2.1 DC Output Power
Power is provided to V
CC2
on the right side of the device at TB2 terminal as shown in Figure 2 . The dc
supply must be able to provide a bias voltage over the range of +15-V DC to +30-V DC. As the current
requirement is extremely low, the user can choose to operate the ISO5851 EVM by battery. If a negative
gate drive is required, a dc supply (or battery) must be connected across V
EE2
at the TB3 terminal as
shown in Figure 2 . The voltage range must be between 0-V and 15-V DC.
4.1.2.2 DESAT – JMP3
One of the features of the ISO5851 is the IGBT desaturation protection. JMP3 provides access to the
DESAT pin. It is a 3-pin male header, and installing a shorting jumper between pin 1 and pin 2 on JMP3
disables the DESAT function.
4.1.2.3 Load
As shipped, the ISO5851EVM does not have an IGBT installed. The user can evaluate device operation
using a capacitive load of 1nF provided on EVM or capacitive load can be removed and IGBT can be
connected onto the board. Most IGBTs are available in the standard TO-247 or TO-220 package. The
PCB has provisions to solder an IGBT directly onto the board.
4.1.2.3.1 No IGBT Installed – JMP2
When using the capacitive load, the user must install a jumper short onto JMP2. It connects a 1-nF
capacitor (C12) to the OUT pin. The capacitive consists of the 10-
Ω gate resistor (R3) and the 1-nF
capacitor (C12).
4.1.2.3.2 IGBT Installed – REMOVE JMP2
If the user chooses to install an IGBT, JMP2 must be left open with no shorting jumper installed. The PCB
has been designed with plated-through holes (or vias) as Q1 and Q2 shown on the schematic for IGBT
connections.
4.1.2.4 Turn-on and Turn-off Adjust
The PCB contains10- Ω gate resistor (R3), D4 diode, and 10- Ω R12 resistor. It allows the user to evaluate
device operation with different turn-on and turn-off characteristics. It is shown in Figure 9 .
Figure 9. To have different Turn-on and Turn-off
9 SLLU218 – June 2015 ISO5851 Evaluation Module
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