Ordering number : EN7465A
Thick-Film Hybrid IC
STK672-220-E
Overview
Unipolar Constant-Current Chopper
Two-Phase Stepping Motor Driver
Output Current 2.8A
The STK672-220-E is two-phase stepping motor driver hybrid IC (HIC) that features further miniaturization and improved
input logic flexibility as compared to the STK6713 series products.
Applications
•
The STK672-220-E is optimal for use as a stepping motor driver in printers, copiers, XY plotters, and similar equipment.
Features
•
Built-in common-mode input protection circuit.
•
The input signal logic lines are provided as active-high and active-low pairs, and thus support switching the motor wiring.
•
Built-in current detection resistor for reduced external component mounting area on the printed circuit board.
•
Inhibit pin (cuts off the motor current)
•
Wide motor operating range (10 to 45V)
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer
'
s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer
'
s products or
equipment.
71608HKIM/61504TN (OT) No.7465-1/10
STK672-220-E
Specifications
Absolute Maximum Ratings
at Tc = 25°C
Parameter
Maximum supply voltage 1
Maximum supply voltage 2
Input voltage
Output current
Allowable power dissipation
Operating substrate temperature
Junction temperature
Storage temperature
Symbol
VCC1 max
VCC2 max
VIN max
IOH max
Pd max
Tc max
Tj max
Tstg
No signal
No signal
Logic input pins
0.5s, 1 pulse, when VCC1 is applied
With an arbitrarily large heat sink. Per MOSFET
Conditions
Ratings
52
-0.3 to +7.0
-0.3 to +7.0
3.3
9
105
150
-40 to +125
Unit
V
V
V
A
W
°C
°C
°C
Allowable Operating Ranges
at Ta = 25°C
Parameter
Supply voltage 1
Supply voltage 2
Input voltage
Phase driver withstand voltage
Output current 1
Output current 2
Symbol
VCC1
VCC2
VIH
VDSS
IOH1
IOH2
ID = 1mA (Tc = 25°C)
CLK
≥
200Hz, Tc = 105°C
CLK
≥
200Hz, Tc = 80°C
With signals applied
With signals applied
Conditions
Ratings
10 to 45
5.0 ± 5%
0 to VCC2
100
2.8
3
Unit
V
V
V
V
A
A
Electrical Characteristics
at Tc = 25°C, VCC1 = 24V, VCC2 = 5V
Parameters
Control supply current
Output average current
FET diode forward voltage
Output saturation voltage
Vref input voltage
Vref input bias current
[Control Input Pins]
Input voltage
VIH
VIL
Input current
IIH
IIL
HIC pins 6, 7, 8, 9, and 11
HIC pins 6, 7, 8, 9, and 11
HIC pins 6, 7, 8, 9, and 11, VIN = VCC2
HIC pins 6, 7, 8, 9, and 11, VIN = 0V
310
2.5
3.5
0.7
V
V
μA
μA
Symbols
ICCO
Ioave
Vdf
Vsat
VrH
IIB
Conditions
min
With all inputs at the VCC2 level
With R/L = 3.5Ω/3.8mH in each phase
If = 1.0A
RL = 12Ω
Pin 12
With pin 12 at 1V
0
50
0.549
Rating
typ
3.3
0.610
1.1
0.7
max
10
0.671
1.8
1.2
3.5
500
mA
A
V
V
V
nA
unit
Note: A fixed-voltage power supply must be used.
Package Dimensions
unit:mm (typ)
4167
46.6
41.2
8.5
12.7
1
2.0
(9.6) 11 2=22
4.0
12
0.5
1.0
3.6
25.5
0.4
2.9
No.7465-2/10
STK672-220-E
Internal Block Diagram
φ
AB
5
4
8
φ
A
9
Vref
12
φ
BB
6
φ
B
7
VCC2
10
3
2
Off
Time
setting
Inhibit
11
Off
Time
setting
PG
1
SUB
Sample Application Circuit
VCC2=5V
10
φA
φAB
φB
φBB
Inhibit
Ro1
Co2=10μF
9
8
7
6
11
2
3
Stepping motor
4
5
At least VCC1=24V
STK672-220-E
Co1=220μF
+
12
+
Ro2
1
S.GND
P.GND
ITF02299
•
The Co1 ground lead must be connected as close as possible to pin 1 on the hybrid IC.
•
HC type CMOS levels are recommended as the input specifications for pins 6 to 9.
•
In case of TTL input, connect a pull-up resistor. (Recommended value: 2kΩ)
•
Excitation control input specifications
Corresponding output pin
2 pin
3 pin
4 pin
5 pin
Corresponding excitation control input signal
Active: High
φB
φBB
φA
φAB
Active: Low
φBB
φB
φAB
φA
No.7465-3/10
STK672-220-E
Phase signal: Active low input
2-phase excitation
Clock
Pin 6
Phase signal BB
Pin 7
Phase signal B
Pin 8
Phase signal AB
Pin 9
Phase signal A
Pin 2
MOSFET gate signal
Pin 3
MOSFET gate signal
Pin 4
MOSFET gate signal
Pin 5
MOSFET gate signal
1-2 phase excitation
Clock
Pin 6
Phase signal BB
Pin 7
Phase signal B
Pin 8
Phase signal AB
Pin 9
Phase signal A
Pin 2
MOSFET gate signal
Pin 3
MOSFET gate signal
Pin 4
MOSFET gate signal
Pin 5
MOSFET gate signal
Phase signal: Active high input
2-phase excitation
Clock
Pin 6
Phase signal BB
Pin 7
Phase signal B
Pin 8
Phase signal AB
Pin 9
Phase signal A
Pin 2
MOSFET gate signal
Pin 3
MOSFET gate signal
Pin 4
MOSFET gate signal
Pin 5
MOSFET gate signal
1-2 phase excitation
Clock
Pin 6
Phase signal BB
Pin 7
Phase signal B
Pin 8
Phase signal AB
Pin 9
Phase signal A
Pin 2
MOSFET gate signal
Pin 3
MOSFET gate signal
Pin 4
MOSFET gate signal
Pin 5
MOSFET gate signal
No.7465-4/10
STK672-220-E
Setting the Motor Current Peak Value (IOH)
IOH
≈
Vref
÷
Rs
Vref: STK672-220-E pin 12 input voltage
Rs: STK672-220-E internal current detection resistor (0.17Ω ±2%)
I
OH
0
Model of the Motor Current Flowing into the Driver IC (pins 2, 3, 4, and 5)
Vref = (Ro2
÷
(Ro1 + Ro2))
×
VCC2
VCC2 = 5V
Current Switching Techniques
Due to the input bias current (IIB) specifications, Ro1 must be under 100kΩ.
The figures below present sample circuits that temporarily switch the motor current when, for example a held motor
stops.
We recommend using the circuit structure in the figure at the left to minimize as much as possible the effects of the
saturation voltage of the reference voltage switching transistor.
5V
5V
Ro1
Vref
Ro1
Ro3
Ro2
Ro3
Ro2
Vref
Switching Circuit 1
Switching Circuit 2
Input Pin Circuits
Input pin
Pin 6, 7, 8, and 9
Circuit type
X phase
(XB phase)
MOSFET gate signal
XB phase PWM signal
5V
10kΩ
10kΩ
To XB phase
5V
The 5V/GND switch shows how toff
time setting operates in the internal
block diagram on page 3. When
switched to GND, pull-down with an
input resistance of 20kΩ is formed.
Pin 11
10kΩ
Inhibit
10kΩ
GND
Pin 12
VCC2
CR input
Vref
To one of the comparator
GND
No.7465-5/10
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