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BD63520AEFV Datasheet(PDF) 8 Page - Rohm

Part # BD63520AEFV
Description  Micro step 36V Stepping Motor Drivers
Download  27 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD63520AEFV Datasheet(HTML) 8 Page - Rohm

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BD63520AEFV
TSZ02201-0P2P0B701530-1-2
© 2016 ROHM Co., Ltd. All rights reserved.
17.Aug.2016 Rev.001
www.rohm.com
TSZ22111・15・001
○Thermal Shutdown (TSD)
This IC has a built-in thermal shutdown circuit for thermal protection. When the IC’s chip temperature rises above
175℃(Typ), the motor output becomes OPEN. Also, when the temperature returns to under 150℃ (Typ), it
automatically returns to normal operation. However, even when TSD is in operation, if heat is continued to be added
externally, heat overdrive can lead to destruction.
○Over Current Protection (OCP)
This IC has a built in over current protection circuit as a provision against destruction when the motor outputs are
shorted each other or VCC-motor output or motor output-GND is shorted. This circuit latches the motor output to OPEN
condition when the regulated threshold current (Target:5A,25℃, typ)
flows for 4μs (Typ). It returns with power
reactivation or a reset of the PS terminal. The over current protection circuit’s only aim is to prevent the destruction of
the IC from irregular situations such as motor output shorts, and is not meant to be used as protection or security for
the set. Therefore, sets should not be designed to take into account this circuit’s functions. After OCP operating, if
irregular situations continues and the return by power reactivation or a reset of the PS terminal is carried out repeatedly,
then OCP operates repeatedly and the IC may generate heat or otherwise deteriorate. When the L value of the wiring
is great due to the wiring being long, after the over current has flowed and the output terminal voltage jumps up and the
absolute maximum values may be exceeded and as a result, there is a possibility of destruction. Also, when current
which is over the output current rating and under the OCP detection current flows, the IC can heat up to over
Tjmax=150℃and can deteriorate, so current which exceeds the output rating should not be applied.
○Under Voltage Lock Out (UVLO)
This IC has a built-in under voltage lock out function to prevent false operation such as IC output during power supply
under voltage. When the applied voltage to the VCC terminal goes under 5V (Typ), the motor output is set to OPEN.
This switching voltage has a 1V (Typ) hysteresis to prevent false operation by noise etc. Please be aware that this
circuit does not operate during power save mode. Also, the electrical angle is reset when the UVLO circuit operates
during CLK-IN drive mode.
○Over Voltage Lock Out (OVLO)
This IC has a built-in over voltage lock out function to protect the IC output and the motor during power supply over
voltage. When the applied voltage to the VCC terminal goes over 32V (Typ), the motor output is set to OPEN. This
switching voltage has a 1V (Typ) hysteresis and a 4μs (Typ) mask time to prevent false operation by noise etc.
Although this over voltage locked out circuit is built-in, there is a possibility of destruction if the absolute maximum
value for power supply voltage is exceeded, therefore the absolute maximum value should not be exceeded. Please be
aware that this circuit does not operate during power save mode.
○Ghost Supply Prevention (protects against malfunction when power supply is disconnected)
If a signal (logic input, MTH, VREF) is input when there is no power supplied to this IC, there is a function which
prevents the false operation by voltage supplied via the electrostatic destruction prevention diode from these input
terminals to the VCC to this IC or to another IC’s power supply. Therefore, there is no malfunction of the circuit even
when voltage is supplied to these input terminals while there is no power supply.


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