STK672-060 View Datasheet(PDF) - SANYO -> Panasonic
Part Name
Description
Manufacturer
STK672-060
SANYO -> Panasonic
STK672-060 Datasheet PDF : 19 Pages
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STK672-060
Recommendations for PCB Designs
This hybrid IC has three ground pins: the PG pins (pins 3 and 4) and the SG pin (pin 22). These pins are connected
internally.
Two power supplies are required: one power supply for motor drive and another for the hybrid IC 5 V control system. If
there are problems with the ground connections for these power supplies, that can in turn cause the motor current
waveform to become unstable, an increase in audible motor noise, or increased motor vibration. The ground lines must be
designed appropriately.
This section describes two ground connection methods.
• When the grounds for the motor drive power supply and the hybrid IC 5 V power supply are connected close to the
power supplies
a) If PG and SG are shorted at the power supply side, connect only the PG line to pins 3 and 4 on the hybrid IC. Verify
that voltage drops due to common line impedances do not occur. Note that VCC2 is required to be within ±5% in the
specifications.
b) Connecting the Vref ground to pin 22 provides more stable current waveforms.
c) For initial values, use 100 µF or higher for C1 and 10 µF or higher for C2.
C1 must be located close to the hybrid IC and the capacitor ground line must be as short as possible.
+
Motor
drive
power
--
supply PG
Stepping motor
C1 +
STK672-060
+
5V
power --
supply
SG
100µF or higher
Clock
generation
oscillator
3
PG
4
7 VCC2
+
8 Vref
14 CLK
22
SG
ITF02270
• When the grounds for the motor drive power supply and the hybrid IC 5 V power supply are separated
a) Place the capacitor C1 (100 µF or higher) as close to the hybrid IC as possible. This capacitor's ground line must be
as short as possible.
Connect the capacitor C2 of an appropriate value if required. It's ground line must be as short as possible.
+
Motor
drive
power
--
supply PG
Stepping motor
C1 +
STK672-060
Isolated
+
5V
power --
supply
SG
100µF or higher
Clock
generation
oscillator
3
PG
4
7 VCC2
+
8 Vref
14 CLK
22
SG
ITF02271
No. 7441-7/19
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