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STK611-721-E Datasheet(PDF) 8 Page - ON Semiconductor

Part # STK611-721-E
Description  3-Phase Motor Drive Inverter Hybrid IC
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

STK611-721-E Datasheet(HTML) 8 Page - ON Semiconductor

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STK611-721-E
No.A1718-8/9
Usage Precaution
1. By the addition of the diode for the bootstrap (DB : high speed type with withstand voltage of 600V or more) and of
the capacitor (CB : about 1 to 47
μF), a single power supply drive is enabled. In this case, an electric charge is
charged to CB by turning on the lower side IGBT (By inputting LOW signal to lower side). The problem of causing
the adverse effect by the noise etc. might occur because big charging current flows when the voltage of CB is low as
started, and put limitation resistor RB (About tens of
Ω from the number of Ω), please. (When not using bootstrap
circuit, each upper side pre-driver needs an external independent power supply.) Also, the upper side power supply
voltage sometimes declines depending on controlling condition. Please confirm the voltage with an actual set.
2. The voltage jump associated with vibration caused by the switching operation occurs through the influence of
floating inductance on the wiring of the external power supply, which is connected to “+” and “-” terminals; therefore,
it is recommended that the wiring inductance be low by shortening the wiring length (between CI and each terminal)
and the snubber circuit (capacitor/CS/about 0.1 to 10
μF) for voltage absorption be connected as close as possible
between “+” and “-” terminals to reduce the surge voltage.
3. Output form of “FAULT/EN” terminal (pin 17) is open DRAIN (it operates as “FAULT” when becoming “LOW”).
Moreover, please connect the pull-up resistor (RP) so that the voltage of this terminal may usually become 2.5V or
more because this terminal holds the shutdown input of internal pre-driver (It usually operates by 2.5V or more, and
stop operation by 0.8V or less) concurrently. When the pull-up voltage is 5V, use RP with resistance 6.8k
Ω or more,
and in case of 15V, use RP with resistance 20k
Ω or more.
4. Inside the H-IC, a thermistor is connected between “TH” terminal (pin 1) and “VSS” terminal (pin 19). The
thermistor can be used as the temperature monitor by connecting the pull-up resistor (RP) externally. When the pull-
up voltage is 5V, use “RP” with resistance 10k
Ω or more, and in case of 15V, use “RP” with resistance 39kΩ or
more.
5. Although the pull-down resistor is connected with the inside of the signal input terminal, connect the pull-down
resistor (about 2.2 to 3.3k
Ω) outside to decrease the influence of the noise by wiring etc.
6. The H-IC may be destroyed when the motor connection terminals (pins 4, 6 and 8) are opened while the motor is
running; therefore please be especially careful about the connection (soldering condition) of these terminals.
7. The “ITRIP” terminal (pin 16) is the input terminal of the built-in comparator. It can stop operation by inputting the
voltage
more than VITRIP (0.41V to 0.52V). (Apply voltage less than VITRIP to this pin when normal operation).
Please use it as various protections such as the overcurrent protection (feedback from external shunt resistor).
In addition, the protection operation will not be latched.
After the protection operation ends, the H-IC operation resumes typ.8ms later. Therefore, turn all the input signals
OFF (low) as soon as the protection operation is detected.
8. When input pulse width is less than 1μs, an output may not react to the pulse. (Both ON signal and OFF signal)
This data shows the example of the application circuit and does not guarantee a design as the mass production set.


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