PS22A78-E Datasheet, PDF (7/11 Pages) Mitsubishi Electric Semiconductor – Dual-In-Line Package Intelligent Power Module

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PS22A78-E
TRANSFER MOLDING TYPE
INSULATED TYPE
[C] Under-Voltage Protection (P-side, UVDB)
c1. Control supply voltage VDB rises. After the voltage reaches under voltage reset level UVDBr, IGBT turns on by next ON signal (L H).
c2. Normal operation: IGBT ON and outputs current.
c3. VDB level drops to under voltage trip level (UVDBt).
c4. IGBT of corresponding phase only turns OFF in spite of control input signal level, but there is no FO signal output.
c5. VDB level reaches UVDBr.
c6. Normal operation: IGBT ON and outputs current by next ON signal (L H).
Control input
Protection circuit state
Control supply voltage VDB
RESET
SET
UVDBr
c1
UVDBt
c3
Output current Ic
c2
c4
RESET
c5
c6
Error output Fo
Keep High-level (no fault output)
Fig. 5 MCU I/O Interface Circuit
5V line
MCU
10kΩ
DIPIPM
UP,VP,WP,UN,VN,WN
Fo
3.3kΩ(min)
VNC(Logic)
Note)
Design for input RC filter depends on the PWM control scheme used in the
application and the wiring impedance of the printed circuit board.
But because noisier in the application for 1200V, it is strongly recommended to
insert RC filter. (Time constant: over 100ns. e.g. 100Ω, 1000pF)
The DIPIPM input signal interface integrates a min. 3.3kΩ pull-down resistor.
Therefore, when using RC filter, be careful to satisfy turn-on threshold voltage
requirement.
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 IFo under 1mA. In
the case of pulling up to 5V supply, over 5.1kΩ is needed. (10kΩ 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
N1
NV
VNC
NW
Shunt
GND wiring from VNC should
resistors
be connected close to the
terminal of shunt resistor.
Low inductance shunt resistor like surface mounted (SMD) type is recommended.
Protection current level ISC changes by inserting shunt resistor.
Publication Date : January 2012
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