STK672-330 Sanyo Semicon Device, STK672-330 Datasheet - Page 4

• Manufacturer Part Number: STK672-330
• Description: Two-Phase Stepping Motor Driver
• Manufacturer: Sanyo Semicon Device

Sample Application Circuit
• To minimize noise in the 5-V system, locate the ground side of capacitor CO2 in the above circuit as close as possible
• Insert resistor RO3 (47 to 100 Ω) so that the discharge energy from capacitor CO4 is not directly applied to the CMOS IC
• Both TTL and CMOS levels are used for the pin 8, 9, 10, 11 and 12 inputs.
• Since the input pins do not have built-in pull-up resistors, when the open-collector type pins 8, 9, 10, 11, and 12 are
• To prevent incorrect operation due to chopping noise, we recommend inserting 470 to 1000 pF capacitors between pin
(With the open-collector type IC, we also recommend inserting a 470 to 1000 pF capacitor between pin 11 (RESETB)
• The following circuit (for a lowered current of over 0.2 A) is recommended if the application needs to temporarily
to pin 1 of the IC. Also, if at all possible, the ground used for Vref must not be common to the P.GND pattern, but must
be directly wired from pin 1.
in this hybrid device. If the diode D1 has Vf characteristics with Vf less than or equal to 0.6 V (when If = 0.1 A), this will
be smaller than the CMOS IC input pin diode Vf. If this is the case RO3 may be replaced with a short without problem.
used as inputs, a 10 to 47 kΩ pull-up resistor (to V
1 and each of the pins 8, 9, 10, and 12.
and pin 1 when pin 11 is used as an input.)
lower the motor current. Here, a value of close to 100 kΩ must be used for resistor RO1 to make the transistor output
saturation voltage as low as possible.
V
ENABLE
CLOCK
CO4
DD
MODE
CWB
= 5 V
5 V
+
D1
RO3
RO4
RO3
10 F
20 k
RO2
RO1
RO1
RO2
RESETB
5 V
Vref
0.1 F
CO1
5 V
CO3
Vref
10 F
+
ITF02171
6
9
8
10
12
11
7
STK672-330
DD
STK672-330
) must be used.
5
4
3
2
1
A
AB
B
BB
GND
Two-phase stepping motor
RO3
RO1
RO2
5 V
Vref
+
At least 100 F
CO2
ITF02172
P.GND
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V CC
24 V
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