Printed-Circuit Board
2.1.2
2.1.2.1
Right-Side Operation
DC Power
Power is provided to Vcc2 on the right side of the device at TP12 (+Vdc) and TP11 (–Vdc). The dc supply
must be able to provide a bias voltage over the range of +15 Vdc to +30 Vdc. As the current requirement
is extremely low, the user may choose to operate the ISO5500 by battery. Solder holes are provided next
to the test points if the user chooses to hardwire these connections. If a negative gate drive is required, a
dc supply (or battery) must be connected across VE (P5 or MFG1) to VEE (MGF11 or TP11). The voltage
range must be between 0 V and 15 Vdc.
2.1.2.2
DESAT
–
JMP2
One of the features of the ISO5500 is the IGBT desaturation protection. JMP2 provides access to the
DESAT pin. It is a 2-pin male header, and installing a shorting jumper onto JMP2 disables the DESAT
function.
2.1.2.3
IGBT (or MOSFET)
As shipped, the ISO5500EVM does not have an IGBT installed. The user can evaluate device operation
using a simulated IGBT load or they can remove the simulated load and install an IGBT onto the board.
Most IGBTs are available in the standard TO-247 package. The PCB has provisions to solder an IGBT
directly onto the board.
2.1.2.3.1
No IGBT (or MOSFET) Installed
–
JMP3
When using the simulated load, the user must install a jumper short onto JMP3. This connects a 10-nF
capacitor (C9) to the Vout pin. The simulated IGBT consists of the 10-Ω gate resistor (R4) and this 10-nF
capacitor (C9).
2.1.2.3.2
IGBT (or MOSFET) Installed
–
REMOVE JMP3
If the user chooses to install an IGBT, JMP must be left open with no shorting jumper installed. The PCB
has been designed with several large plated-through holes (or vias) to support both high-side and low-side
drive configurations. (Note: Plated-through holes are designated as MFGx on the schematic.) The
connections for these modes are described next.
2.1.2.3.3
High-Side/Low-Side Operation and Interconnection
The connections required for high-side and low-side operation are shown in
and
respectively. The user can select the load and install it directly on the PCB.
SLLU136
–
September 2011
ISO5500EVM
Copyright
©
2011, Texas Instruments Incorporated
3
TI [ TEXAS INSTRUMENTS ]
