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Table 1: L-Series IPM Line-Up and Interface Circuit Selection
Figure 1: L-Series IPMs
Part Num ber
Voltage Current
(V) (A)
Package
Recom m ended
DC to DC Converters
Reference
Design
PM50(#)L(*)060
50
PM75(#)L(*)060
PM100(#)L(*)060
PM150(#)L(*)060
PM200(#)LA060
PM300(#)LA060
PM450CLA060
PM600CLA060
600
75
100
150
200
300
450
600
A or B
C
D
VLA106-24151 x 4pc.
VLA106-24151 x 3pc.
VLA106-24154 x 1pc.
VLA106-24151 x 6pc.
BP7A
BP6A
Package A
PM25(#)L(*)120
25
PM50(#)L(*)120
50
A or B
VLA106-24151 x 4pc.
PM75(#)L(*)120
PM100(#)LA120
PM150(#)LA120
1200
75
100
150
C
VLA106-24151 x 3pc.
VLA106-24154 x 1pc.
BP7A
Package B
PM200CLA120
200
PM300CLA120
300
D
VLA106-24151 x 6pc.
BP6A
PM450CLA120
450
(*) Package Option: B =Solder pin, A =Screw terminal
(#) Circuit Option: R =Six Pack+Brake, C =Six pack
Example:
PM75 R L B 120 is a 75A, 1200V six pack with brake in a solder pin package
Overview:
A significant advantage provided by the L-Series IPM’s built-
in gate drive and protection circuits is that the entire family outlined
in Table 1 requires only two different interface circuit designs. The
standard interface circuit consists of opto-couplers to transfer control
signals and isolated power supplies to power the IPM’s internal
circuits. The two circuits are similar except that devices in packages
A, B, and C have a common control ground for all three low side
IGBTs. This permits use of a single low side supply so that only four
isolated supplies are required. The Powerex BP7A reference design
is an example of this circuit. The remaining large L-Series IPMs in
package D utilize separate control grounds on the low side to
Package C
Package D
minimize ground bounce induced noise. As a result these devices
require six isolated power supplies. Interface circuit details for these devices are available in the Powerex BP6A
reference design application note.
Isolated DC to DC Converters:
In order to simplify the design and layout of the required control power supplies Powerex has introduced
the VLA106-24151 and VLA106-24154 isolated DC to DC converters shown in figure 2. Both DC to DC
converters are designed to operate from a 24V DC supply and produce an isolated 15V DC output. The
VLA106-24151 provides up to 100mA and the VLA106-24154 provides up to 300mA for control power. Both DC
to DC converters use transformers to provide 2500VRMS isolation between the primary and secondary side.
The BP7A board uses three VLA106-24151 DC to DC converters to provide high side control power for the L-
Series IPMs. The low side control power can be supplied by either a VLA106-24151 or VLA106-24154. The
higher current VLA106-24154 is only needed for low side control power on the package C IPMs when the
current draw of the three low side gate drive circuits exceeds 100mA. Table 1 shows the recommended DC to
DC converters for each L-Series IPM.
2
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