Specifications

30
Dec. 2012
Mitsubishi IPM-series Application Note
9-3 Control Power supply of IPM
(1) The control power supply
The voltage range including ripples should meet the specification.
Control supply voltage V
D
(V) Operation behavior
0~4.0 It is almost the same as no power supply.
External noise may cause IPM malfunction (turns ON).
Supply under-voltage protection will not operate and no
Fo signal will be asserted.
4.0~12.5 Even if control input signals are applied, IGBT does not work
Supply under-voltage protection starts operation and outputs
Fo signals.
12.5~13.5 Switching operation works. However, this value is below the
recommended one, V
CE(sat)
and switching time will be out of the
specified values, it may increase collector dissipation and
junction temperature.
13.5~16.5 Recommended values.
16.5~20
Switching operation works. This range, however, is over the
recommended value, thus, too fast switching speed might
cause the chips to be damaged
20.0~ The control circuit will be destroyed.
Specifications for Ripple Noise
High frequency noise super imposed on the control IC supply line might cause IC malfunction and cause an
Fo signal output, and results IPM stop (interrupt gates). To avoid such malfunction, the supply circuit should
be designed such that the noise fluctuation is smaller than +/- 5V/us, and the ripple voltage is less than 2V.
Specification :
usV
dt
dv
/5±≤ , pVpVripple −≤ 2
When the noise on the power supply line is a high frequency(pulse-width<about 50ns,
pulse-vibration<about 5V) which does not cause an Fo output from IPM, the noise can be ignored.
The power supply should be a low impedance, be careful of the pattern layout.
Connect a bypass condenser with good frequency response and a smoothing condenser close to the
terminals of IPM. It is effective for the prevention of the malfunction.
Control Supply Starting up and Shutting Down Sequence
Control supply VD should be started up prior to the main supply (P-N supply).
Control supply V
D should be shut down after the main supply (P-N supply).
If the main supply had been started up before the control supply, or if the main supply remains after
control supply was shut down, external noise might cause the IPM malfunction.
As for the P-side , use the control power supply which was insulated in each of all of the 2 aspects.
As for the N-side , because the GND in 2 aspects and the converter part is common, a common power can be
used for the three control sources in amount.
Using IPM