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1EDI30J12CP View Datasheet(PDF) - Infineon Technologies

Part Name
Description
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1EDI30J12CP
Infineon
Infineon Technologies Infineon
1EDI30J12CP Datasheet PDF : 28 Pages
First Prev 21 22 23 24 25 26 27 28
EiceDRIVER™ Enhanced
1EDI30J12CP
Application Hints
6
Application Hints
This chapter gives some hints on how the auxiliary supplies can be set up to supply the driver.
6.1
Driver Supply Set up
Figure 10 shows the standard topology where the auxiliary supply is connected between VCC2 and VEE2. In this
case the internal regulator is used to create the -19 V VReg supply.
+5V
CVCC1
GND
IN
a)
VCC1 JFDrv
VCC2
GND1 MDrv
EN
VReg
IN
CLJFG
VEE2
BSEN
1EDI30J12Cx
CVReg
CVEE2
Isolated ,
floating
-22V … -28V
+5V
CVCC1
GND
IN
b)
VCC1 JFDrv
VCC2
GND1 MDrv
EN
VReg
IN
CLJFG
VEE2
BSEN
1EDI30J12Cx
CVReg
CVEE2
Isolated,
floating
-22V … -28V
Figure 10 Isolated and floating supply, a) cascode configuration, b) only JFET
It is also possible to supply the driver with -19 V directly. In this case (shown in Figure 11) the pins VReg and VEE2
are shorted and CVEE2 as well as the corresponding diode are not needed. It has to be made sure that the -19 V
supply is accurate within +/- 5 %.
+5V
CVCC1
GND
IN
a)
VCC1 JFDrv
VCC2
GND1 MDrv
EN
VReg
IN
CLJFG
VEE2
BSEN
1EDI30J12Cx
CVReg
Isolated ,
floating
-19V +/- 5%
+5V
CVCC1
GND
IN
b)
VCC1 JFDrv
VCC2
GND1 MDrv
EN
VReg
IN
CLJFG
VEE2
BSEN
1EDI30J12Cx
CVReg
Isolated,
floating
-19V +/- 5%
Figure 11 Isolated and floating direct supply, a) cascode configuration, b) only JFET
The third option of connecting the auxiliary supply is to connect it between the MOSFET drain and VEE2
(Figure 12). Since the auxiliary power supply is not connected to the reference node of the driver stage (VCC2)
an additional 10 resistor is needed between the power supply and the VEE2 pin. This resistor limits the current
coming from the supply when current is switched through the MOSFET. When a current is switched through the
MOSFET a voltage is induced in the parasitic inductances of the MOSFET which leads to a voltage difference
between the reference node of the driver and the supply reference node. As in the first described method the
internal regulator is active and supplies the driver stages with the needed -19 V.
When using this power supply option for switches which MOSFET drains are connected to the same node and
potential one power supply can be used to power two or more driver stages. The best example are the low side
switches in a H-bridge (see Figure 6 and Figure 14).
Preliminary Datasheet
21
Rev. 1.3, 2014-11-12
 

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