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M54640P View Datasheet(PDF) - Renesas Electronics

Part NameDescriptionManufacturer
M54640P Stepper Motor Driver Renesas
Renesas Electronics Renesas
M54640P Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
M54640P
Application Example
Stepper motor
1
820pF
1k
16 15 14 13 12 11 10 9
M54640P
1 2 3 45 67 8
820pF
56k
1
1k
820pF
16 15 14 13 12 11 10 9
M54640P
1 234 567 8
820pF
56k
5V
Phase A
I0A
I1A
24V
47µF
Phase B
I0B
I1B
Precautions for use
(1) When the whole output current changes by a large margin (for example, when overheat protection operation causes
intermittent flow of output current), the supply voltage may undergo a change. Therefore, selection and wiring of power
supply should be conducted cautiously to avoid such a situation that the supply voltage exceeds the absolute maximum
ratings.
(2) When the supply voltage changes by a large margin, the operation of this IC may become unstable. In this case, the
change of supply voltage can be controlled by connecting a capacitor at the point near to IC pin between Vcc pin and
GND pin. (See above application example.)
(3) Thermal shutdown function
The state of thermal shutdown operation may differ according to the way of wiring within a board. Therefore,
sufficient board evaluation should be conducted before use. When the board is changed, operation on the replacing
board should be evaluated.
The circuit board on which this IC is mounted is designed to realize low impedance between power supply and
output pin.
Therefore, it is desirable to take a safe measure such as fixing a fuse to avoid such a situation that the board is
damaged by a fire when output pin is internally short-circuited by excessively applied surge voltage by accident.
Rev.1.0, Sep.19.2003, page 8 of 9
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