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MITSUBISHI SEMICONDUCTOR < Dual-In-Line Package Intelligent Power Module>
PS21A79
TRANSFER-MOLD 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 can turn on when inputting 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.
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
Fig. 6 MCU I/O INTERFACE CIRCUIT
5V line
10k Ω
Keep High-level (no fault output)
DIPIPM
U P ,V P ,W P ,U N ,V N ,W N
MCU
Fo
3.3k Ω (min)
V NC (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.
The DIPIPM input signal interface integrates a 3.3k ? (min) pull-down resistor. Therefore, when using RC filter, be careful to satisfy the 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 I Fo
under 1mA. In the case of pulling up to 5V supply, over 5.1k ? is needed. (10k Ω ? is recommended.)
7
March 2011
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