IC-SP-06027 R1
4-2. Functions of the pins
Table 4-2. List of pins and their functions (pins common to all models)
No. Pin
Item
1 VCC Control power supply pin
Functions and Precautions
•
Powers the drive circuits for the top
and bottom arms, the charge pump
circuit, the built-in VB supply circuit,
and others.
•
Determine the capacity of the power
supply for VCC allowing a margin by
adding the standby current Icc and the
current taken out of CB pin.
•
Connected to the collector of the top
arm IGBT.
•
Connect pins VS1 and VS2 close to
the IC pin. If either pin is open, the IC
may get destroyed.
Related items
•
5-1. (1) VCC under
voltage Detection
•
5-3. Power supply
sequence
•
8-3 to 8-7
IC destruction by external
surge or line noise
Remarks
2
VS1 IGBT power pin
VS2
3
CB
High voltage
•
5-3. Power supply
pin
sequence
•
8-3 to 8-5
IC destruction by external
surge
Output pin of the build-in
•
Outputs a voltage (typ 7.5V)
•
5-4. VB power supply
generated in the build-in VB power
VB supply
supply.
•
Provides power from the VB power
supply to the input, three-phase
distribution, FG, internal clock, over
current detection, and other circuits.
•
Connect a capacitor C0 to prevent
oscillation to the CB pin. Capacitor
with capacity of 0.22μF ±20% is
recommended
4
C+
C-
CL
Top arm drive circuit
•
Powers the drive circuit for the top
•
5-2. Charge pump circuit High voltage
power pin
arm.
pin
Charge pump circuit pin
•
Connect external components
(capacitor and diode).
C+
C
-
Top arm
driver
CL
Internal
clock
VS1
VS2
MU
MV
MW
GH1
GH2
GL
Equivalent Circuit
5
6
GL
Control ground pin
•
It is the ground pin for VCC and VB
power lines.
•
Connected to the emitter of the bottom
•
5-1. (2) Current limitation
arm IGBT.
•
Connected to a shunt resistor Rs to
detect over currents.
•
Connect the GH1 and GH2 near the IC
pin. If either pin is open, the IC may get
destroyed.
GH1 IGBT Emitter pin
GH2
-9-