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PS22A76
TRANSFER MOLDING TYPE
INSULATED TYPE
[C] Under-Voltage Protection (P-side, UV DB )
c1. Control supply voltage V DB rises. After the voltage reaches under voltage reset level UV DBr , IGBT turns on by next ON signal (L H).
c2. Normal operation: IGBT ON and outputs current.
c3. V DB level drops to under voltage trip level (UV DBt ).
c4. IGBT of corresponding phase only turns OFF in spite of control input signal level, but there is no F O signal output.
c5. V DB level reaches UV DBr .
c6. Normal operation: IGBT ON and outputs current by next ON signal (L H).
Control input
Protection circuit state
RESET
SET
RESET
UV DBr
Control supply voltage V DB
c1
c2
UV DBt
c3
c4
c5
c6
Output current Ic
Error output Fo
Keep High-level (no fault output)
Fig. 5 MCU I/O Interface Circuit
5V line
Note)
Design for input RC filter depends on the PWM control scheme used in the
10k Ω
DIPIPM
application and the wiring impedance of the printed circuit board.
But because noisier in the application for 1200V, it is strongly recommended to
MCU
U P ,V P ,W P ,U N ,V N ,W N
insert RC filter. (Time constant: over 100ns. e.g. 100?, 1000pF)
The DIPIPM input signal interface integrates a min. 3.3k? pull-down resistor.
Therefore, when using RC filter, be careful to satisfy turn-on threshold voltage
requirement.
Fo
V NC (Logic)
3.3k Ω (min)
Fo output is open drain type. It should be pulled up to the positive side of 5V or
15V power supply with the resistor that limits Fo sink current I Fo under 1mA. In
the case of pulling up to 5V supply, over 5.1k? is needed. (10k? ? is
recommended.)
Fig. 6 Wiring Pattern around the Shunt Resistor in the Case of Inserting into Main Current Path
DIPIPM
Each wiring Inductance should be less than 10nH.
Inductance of a copper pattern with
length=17mm, width=3mm is about 10nH.
NU
NV
N1
V NC
NW
Shunt
resistors
GND wiring from V NC should
be connected close to the
terminal of shunt resistor.
Low inductance shunt resistor like surface mounted (SMD) type is recommended.
Protection current level I SC changes by inserting shunt resistor.
Publication Date : January 2012
7
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