STK672-330 Просмотр технического описания (PDF) - SANYO -> Panasonic
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Компоненты Описание
производитель
STK672-330
SANYO -> Panasonic
STK672-330 Datasheet PDF : 11 Pages
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STK672-330
Sample Application Circuit
VDD = 5 V
CLOCK
MODE
CWB
10 µF
+6
CO3
9
STK672-330
8
10
Two-phase stepping motor
5A
AB
4
ENABLE
12
RO4 20 kΩ RESETB
5V
5V
11
RO3
RO1
D1
Vref
7
+ 10 µF RO2
CO4
0.1 µF
CO1
B
3
2 BB
GND
1
VCC
24 V
+
CO2
At least 100 µF
P.GND
ITF02170
• To minimize noise in the 5-V system, locate the ground side of capacitor CO2 in the above circuit as close as possible
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.
• Insert resistor RO3 (47 to 100 Ω) so that the discharge energy from capacitor CO4 is not directly applied to the CMOS IC
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.
• 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
used as inputs, a 10 to 47 kΩ pull-up resistor (to VDD) must be used.
• To prevent incorrect operation due to chopping noise, we recommend inserting 470 to 1000 pF capacitors between pin
1 and each of the pins 8, 9, 10, and 12.
(With the open-collector type IC, we also recommend inserting a 470 to 1000 pF capacitor between pin 11 (RESETB)
and pin 1 when pin 11 is used as an input.)
• The following circuit (for a lowered current of over 0.2 A) is recommended if the application needs to temporarily
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.
RO3
5V
RO1
Vref
RO2
5V
RO1
Vref
RO3
RO2
ITF02171
ITF02172
No. 7304-4/11
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