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STK672-640CN-E Schematic ( Datenblatt PDF ) - ON Semiconductor

Teilenummer STK672-640CN-E
Beschreibung 2-phase Stepper Motor Driver
Hersteller ON Semiconductor
Logo ON Semiconductor Logo 

Gesamt 30 Seiten
		
STK672-640CN-E Datasheet, Funktion
Ordering number : ENA2317
STK672-640CN-E
Thick-Film Hybrid IC
2-phase Stepper Motor Driver
http://onsemi.com
Overview
The STK672-640CN-E is a hybrid IC for use as a unipolar, 2-phase stepper motor driver with PWM current control.
Applications
Office photocopiers, printers, etc.
Features
Built-in motor terminal open detection function(output current OFF).
There is a terminal to coordinate motor terminal open detection current.
Built-in overcurrent detection function, overheat detection function (output current OFF).
FAULT1 signal (active low) is output when any of motor terminal open, overcurrent or overheat is detected.
The FAULT2 signal is used to output the result of activation of protection circuit detection at 3 levels.
Built-in power on reset function.
The motor speed is controlled by the frequency of an external clock signal.
2 phase or 1-2 phase excitation switching function.
Using either or both edges of the clock signal switching function.
Phase is maintained even when the excitation mode is switched.
Rotational direction switching function.
Supports schmitt input for 2.5V high level input.
Incorporating a current detection resistor (0.089: resistor tolerance 2%), motor current can be set using two
external resistors.
The ENABLE pin can be used to cut output current while maintaining the excitation mode.
With a wide current setting range, power consumption can be reduced during standby.
No motor sound is generated during hold mode due to external excitation current control.
Supports compatible pins with STK672-630CN-E.
Specifications
Absolute Maximum Ratings at Tc = 25C
Parameter
Symbol
Conditions
Maximum supply voltage 1
Maximum supply voltage 2
Input voltage
VCC max
VDD max
Vin max
ENABLE=GND
No signal
Logic input pins
Output current 1
IOP max
10μs 1 pulse (resistance load)
Output current 2
Output current 3
Output current 4
IOH max1
IOH max2
IOF max
VDD = 5V, CLOCK 200Hz
VDD = 5V, CLOCK 200Hz, VCC29V
16pin Output current
Allowable power dissipation 1
PdMF max
With an arbitrarily large heat sink. Per MOSFET
Allowable power dissipation 2
PdPK max
No heat sink
Operating substrate temperature Tcmax
Junction temperature
Tjmax
Storage temperature
Tstg
Ratings
50
0.3 to 6.0
0.3 to 6.0
20
4.0
4.5
10
8.3
3.1
105
150
40 to 125
Unit
V
V
V
A
A
A
mA
W
W
°C
°C
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed,
damage may occur and reliability may be affected.
ORDERING INFORMATION
See detailed ordering and shipping information on page 31 of this data sheet.
Semiconductor Components Industries, LLC, 2014
March, 2014 Ver. 2.2
31814HK 018-14-0004 No.2317-1/31






STK672-640CN-E Datasheet, Funktion
Sample Application Circuit
STK672-640CN-E
VDD(5V)
CLOCK
MODE1
MODE2
CWB
ENABLE
R01
FAULT
C02
10F
+
R02
RESETB
R03
9
12
10 4 A
17
AB
5
13
15
14
STK672
3B
BB
1
-640CN-E
2 phase stepper motor driver
16
Vref
19
2
18 6
N.C
P.G2
P.G1
VCC
24V
+
C01
at least 100F
P.GND
Precautions
[GND wiring]
To reduce noise on the 5V/24V system, be sure to place the GND of C01 in the circuit given above as close as possible
to Pin 2 and Pin 6 of the hybrid IC.
In addition, in order to set the current accurately, the GND side of RO2 of Vref must be connected to the shared ground
terminal used by the Pin P.G1 and P.G2.
[Input pins]
If VDD is being applied, use care that each input pin does not apply a negative voltage less than -0.3V to P. GND,
Pin 2,6. Measures must also be taken so that a voltage equal to or greater than VDD is not input.
Do not wire by connecting the circuit pattern on the P.C.B side to N.C Pins. shown in the internal block diagram.
 Apply 2.5V high level input to pins 10, 12, 13, 14, 15, and 17.
 Since the input pins do not have built-in pull-up resistors, when the open-collector type pins 10, 12, 13, 14, 15, and 17
are used as inputs, a 1 to 20kpull-up resistor (to VDD) must be used.
At this time, use a device for the open collector driver that has output current specifications that pull the voltage down to
less than 0.8V at Low level (less than 0.8V at Low level when IOL=5mA).
[Current setting Vref]
Considering the specifications for the Vref input bias current IIB, we recommend a value 1kor less for R02.
If the motor current is temporarily reduced, the circuit given below(STK672-640CN-E: IOH>0.3A)
is recommended.
5V 5V
R01
Vref
R3 R02
R01
Vref
R3 R02
No.2317-6/31

6 Page







STK672-640CN-E pdf, datenblatt
Package Dimensions
unit : mm
SIP19 29.2x14.4
CASE 127CF
ISSUE O
STK672-640CN-E
1 19
No.2317-12/31

12 Page


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