Fuji Electric Co., Ltd.
3-2
MT6M12343 Rev.1.0
Dec.-2016
Chapter 3
Detail of Signal Input/Output Terminals
1. Control Power Supply Terminals V
CCH
,V
CCL
,COM
Control Voltage Range [V]
Function Operations
0 ~ 4
The IPM doesn’t operate. UV and fault output are not activated. dV/dt noise
on the main P-N supply might cause malfunction of the IGBTs.
4 ~ 13
The IPM starts to operate. UV is activated, control input signals are blocked
and fault output VFO is generated.
13 ~ 13.5
UV is reset. IGBTs are operated in accordance with the control gate input.
Driving voltage is below the recommended range, so V
CE(sat)
and the
switching loss will be larger than that under normal condition and high side
IGBTs can’t operate after VB(*)
*2
initial charging because VB(*) can’t reach
to V
B(ON)
.
13.5 ~ 16.5
Normal operation. This is the recommended operating condition.
16.5 ~ 20
The lower side IGBTs are still operated. Because driving voltage is above
the recommended range, IGBT’s switching is faster. It causes increasing
system noise. And peak short circuit current might be too large for proper
operation of the short circuit protection.
Over 20
Control circuit in this IPM might be damaged.
If necessary, it is recommended to insert a Zener diode between each pair
of control supply terminals.
Please connect a single 15Vdc power supply between V
CCH
,V
CCL
and COM terminals for the IPM
control power supply. The voltage should be regulated to 15V
10% for proper operation. Table 3-1
describes the behavior of the IPM for various control supply voltages. A low impedance capacitor and a
high frequency decoupling capacitor should be connected close to the terminals of the power supply.
High frequency noise on the power supply might cause malfunction of the internal control IC or
erroneous fault signal output. To avoid these problems, the maximum amplitude of voltage ripple on the
power supply should be less than
1V/µs.
The potential at the COM terminal is different from that at the N(*)
*1
power terminal. It is very important
that all control circuits and power supplies are referred to the COM terminal and not to the N(*)
*1
terminals. If circuits are improperly connected, current might flow through the shunt resistor and cause
improper operation of the short-circuit protection function. In general, it is recommended to make the
COM terminal as the ground potential in the PCB layout.
The main control power supply is also connected to the bootstrap circuit which provide a power to
floating supplies for the high side gate drivers.
When high side control supply voltage (V
CCH
and COM) falls down under
V
CCH(OFF)
(Under Voltage trip
level of high side), only the IGBT which occurred the under voltage condition becomes off-state even
though the input signal is ON condition.
When low side control supply voltage (V
CCL
and COM) falls down under V
CCL
UV level, all lower side
IGBTs become off-state even though the input signal is ON condition.
Table 3-1 Functions versus supply voltage
V
CCH
,
V
CCL
1. Voltage Range of control power supply terminals V
CCH
, V
CCL
*1 N(*) : N(U), N(V), N(W)
*2 VB(*) : VB(U)-U, VB(V)-V,VB(W)-W
