MHPM6B5A120D 데이터 시트보기 (PDF) - Motorola => Freescale
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MHPM6B5A120D Datasheet PDF : 10 Pages
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APPLICATION INFORMATION
These modules are designed to be used as the power
stage of a three–phase AC induction motor drive. They may
be used for up to 230 VAC applications. Switching frequen-
cies up to 10 kHz have been considered in the design.
Gate resistance recommendations have been listed.
Separate turn–on and turn–off resistors are listed, to be used
in a circuit resembling Figure 17. All switching characteristics
are given based on following these recommendations, but
appropriate graphs are shown for operation with different
gate resistance. In order to equalize across the three different
module ratings, a normalization process was used. Actual
typical values are listed in the second section of this
specification sheet, “Electrical Specifications,” but many of
the graphs are given in normalized units.
The first three graphs, the DC characteristics, are normal-
ized for current. The devices are designed to operate the
same at rated maximum current (10 and 20 A). The curves
extend to ICpk, the maximum allowable instantaneous
current.
The next graph, turn–off times versus current, is again
normalized to the rated maximum current. The following
graph, turn–off times versus RG(off), is intentionally not
normalized, as all three modules behave similarly during
turn–off.
Turn–on times have been normalized. Again, the graph
showing variation due to current has been normalized for
rated maximum current. The graph showing variation due to
gate resistance normalizes against the recommended RG(on)
for each module. In addition, the times are normalized to tr at
the appropriate temperature. For example, td(on) for a 10 A
module operating at 125°C at 4.0 A can be found by
multiplying the typical tr for a 10 A module at 125°C (220 ns)
by the value shown on the graph at a normalized current of
0.4 (1.4) to get 308 ns. The most salient features demon-
strated by these graphs are the general trends: rise time is a
larger fraction of total turn–on time at 125°C, and in general,
larger gate resistance results in slower switching.
Graphs of switching energies follow a similar structure.
The first of these graphs, showing variation due to current, is
not normalized, as any of these devices operating within its
limits follows the same trend. Eoff does not need to be
normalized to show variation with RG(off), as all three are
specified with the same nominal resistance. Eon, however,
has been appropriately normalized. Gate resistance has
been normalized to the specified RG(on). In order to show the
effect of elevated temperature, all energies were normalized
to Eon at 25°C using the recommended RG(on).
Reverse recovery characteristics are also normalized. IF is
normalized to rated maximum current. Irrm is normalized so
that at maximum current at either 25°C or 125°C, the graph
indicates “10”, while trr is normalized to be “1” at maximum
current at either temperature.
Capacitance values are normalized for ICmax. Due to poor
scaling, gate charge and thermal characteristics are shown
separately for each module.
Many issues must be considered when doing PCB layout.
Figure 19 shows the footprint of a module, allowing for
reasonable tolerances. A polarizing post is provided near pin
1 to ensure that the module is properly inserted during final
assembly. When laying out traces, two issues are of primary
importance: current carrying capacity and voltage clearance.
Many techniques may be used to maximize both, including
using traces on both sides of the PCB to double total copper
thickness, providing cut–outs in high–current traces near
high–voltage pins, and even removing portions of the board
to increase “over–the–surface” creapage distance. Some
additional advantage may be gained by potting the entire
board assembly in a good dielectric. Consult appropriate
regulatory standards, such as UL 840, for more details on
high–voltage creapage and clearance.
1
2
3
4
5
6
7
8
Q1
D1
Q3
D3
Q5
D5
Q2
D2
Q4
D4
Q6
D6
16
15
14
13
12
11
10
9
Figure 18. Schematic of Internal Circuit, Showing Package Pin–Out
MOTOROLA
MHPM6B5A120D MHPM6B10A120D MHPM6B15A120D
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