STK621-041A-E Sanyo Semiconductor Corporation, STK621-041A-E Datasheet - Page 7

• Manufacturer Part Number: STK621-041A-E
• Description: Air Conditioner Three-phase Compressor Motor Driver Imst Inverter Power Hybrid Ic
• Manufacturer: Sanyo Semiconductor Corporation

Block Diagram and Pin Description
Numbers in parentheses indicate the pin numbers.
(1) + and - pins (main circuit power supply input pins)
(2) U, V and W pins
(3) V DD and V SS pins
These pins are connected to the main DC power supply. Voltage up to V CC can be applied. Spike voltage may be
generated during switching operation and result in overvoltage due to the effects of the floating inductance of the
connection wiring. Therefore, use a short wiring length to reduce the wiring inductance, and take measures to
suppress surge voltage and voltage fluctuation such as connecting a snubber circuit for absorbing voltage surges as
close as possible between the + and - pins.
These output pins are connected to the three-phase motor. Note that these pins have the same voltage potential as the
minus-side reference voltage potential of each upper-side control power supply, and are connected to the minus pins
of the capacitors for each upper-side control power supply. Therefore, connect the capacitors as close to these pins
as possible.
These connect the pre-driver circuits for the lower-side power devices with the internal protection circuits and the
external control power supplies for the logic circuits. The voltage over this section is monitored by the undervoltage
protection circuit. (Operation stops when the voltage is insufficient.) In addition, the V SS pin is the reference
voltage potential for the control input signals, the FAULT signal and the ISO signal. Note that the V SS pin is
connected internally with the minus (-) pins. (The main circuit current cannot be taken from the V SS pin.)
FAULT(19)
HIN1(13)
HIN2(14)
HIN3(15)
LIN1(16)
LIN2(17)
LIN3(18)
V DD (21)
V SS (22)
ISO(20)
VB1(1)
VB2(4)
VB3(7)
+(10)
W(8)
-(12)
U(2)
V(5)
CB
CB
CB
Shunt-R
STK621-041,621-041A-E
Shifter
Level
Logic
U.V.
(Protection)
• Excessive Temperature
• Overcurrent
• V DD -Under Voltage
• Latch
Shifter
Level
Logic
U.V.
Reset (All Input=High/OFF)
Shifter
Level
Logic
U.V.
No. A0483-7/13