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TB6560HQ Datasheet(HTML) 22 Page - Toshiba Semiconductor

Part No. TB6560HQ
Description  PWM Chopper-Type bipolar Stepping Motor Driver IC
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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TB6560HQ Datasheet(HTML) 22 Page - Toshiba Semiconductor

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TB6560HQ/FG
2006-05-31
22
Current Draw-out Path when ENABLE is Input in Mid Operation
When all the output transistors are forced OFF during Slow mode, the coil energy is drawn out in the
following modes:
Note: Parasitic diodes are indicated on the designed lines. However, these are not normally used in Mixed
Decay mode.
As shown in the figure above, an output transistor has parasitic diodes.
Normally, when the energy of the coil is drawn out, each transistor is turned ON and the power flows in the
opposite-to-normal direction; as a result, the parasitic diode is not used. However, when all the output
transistors are forced OFF, the coil energy is drawn out via the parasitic diode.
U1
L1
U2
L2
PGND
OFF
OFF
U1
L1
U2
L2
OFF
ON
Note
Load
PGND
U1
L1
U2
L2
OFF
OFF
Note
Load
PGND
Note
RNF
VM
ON
ON
Load
Charge Mode
Slow Mode
Force OFF Mode
ON
RNF
VM
RNF
VM
OFF
OFF
ENABLE is input
OFF


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