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STK672-340-E 查看數據表(PDF) - SANYO -> Panasonic

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STK672-340-E Datasheet PDF : 13 Pages
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Sample Application Circuit
STK672-340-E
STK672-340-E
VDD=5V
CLOCK
MODE
CWB
10μF
+6
CO3
9
8
10
A
5
AB
4
2-phase stepping motor
ENABLE
12
RO4 20kΩ
RESETB
5V
11
5V
RO3
RO1
D1
Vref
7
B
3
BB
2
GND
1
+
10μF
CO4
RO2
0.1μF
CO1
VCC
24V
+
CO2
At least 100μF
P.GND
ITF02170
To minimize noise in the 5V 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 100Ω) 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 0.6V (when If = 0.1A),
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.
Apply 2.5V High level input to pins 8, 9, 10, 11, and 12.
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 47kΩ pull-up resistor (to VDD) must be used.
To prevent incorrect operation due to chopping noise, we recommend inserting 470 to 1000pF 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 1000pF 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 0.2A) is recommended if the application needs to temporarily
lower the motor current. Here, a value of close to 100kΩ must be used for resistor RO1 to make the transistor output
saturation voltage as low as possible.
RO3
5V
RO1
Vref
RO2
ITF02171
5V
RO1
Vref
RO3
RO2
ITF02172
No.A1254-4/13

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