Document
Ordering number : ENA0755A
STK672-600
Thick-Film Hybrid IC
2-phase Stepping Motor Driver
http://onsemi.com
Overview
The STK672-600 is a hybrid IC for use as a unipolar, 2-phase stepping motor driver with PWM current control.
Applications
• Office photocopiers, printers, etc.
Features
• The motor speed can be controlled by the frequency of an external clock signal. • 2-phase excitation or 1-2 phase excitation is selected according to switching the state of the MODE1 pin (low or high). • The excitation mode is set at the rising edge of the clock signal when the MODE2 pin is high, or at the rising edge or
falling edge when the MODE2 pin is low. • The phase is maintained even if the excitation mode is switched in the middle of operation. • The direction of rotation can be changed by applying a high or low signal to the CWB pin used to select the direction
of rotation. • Supports schmitt input for 2.5V high level input. • Incorporating a current detection resistor (0.141Ω: resistor tolerance ±2%), motor current can be set using two
external resistors. • Equipped with an ENABLE pin that, during clock input, allows motor output to be cut-off and resumed later while
maintaining the same excitation timing.
Semiconductor Components Industries, LLC, 2013 June, 2013
62911HKPC 018-08-0102/71608HKIM No. A0755-1/19
STK672-600
Specifications
Absolute Maximum Ratings at Tc = 25°C
Parameter Maximum supply voltage 1 Maximum supply voltage 2 Input voltage Output current Allowable power dissipation 1 Allowable power dissipation 2 Operating substrate temperature Junction temperature Storage temperature
Symbol VCC max VDD max VIN max IOH max PdMF max PdPK max Tc max
Tj max Tstg
Conditions No signal No signal Logic input pins VDD=5V, CLOCK≥200Hz With an arbitrarily large heat sink. Per MOSFET No heat sink
Ratings 52
-0.3 to +7.0 -0.3 to +7.0
2.65 7.8 3.1 105 150
-40 to +125
unit V V V A W W °C °C °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Operating supply voltage 1
VCC
With signals applied
10 to 42
Operating supply voltage 2
VDD
With signals applied
5±5%
Input high voltage Input low voltage
VIH Pins 10, 12, 13, 14, 15, 17 VIL Pins 10, 12, 13, 14, 15, 17
2.5 to VDD 0 to 0.6
Output current 1
IOH1
Tc=105°C, CLOCK≥200Hz, Continuous operation, duty=100%
2.0
Output current 2
IOH2
Tc=80°C, CLOCK≥200Hz, Continuous operation, duty=100%,
2.2
CLOCK frequency
See the motor current (IOH) derating curve fCL Minimum pulse width: at least 10μs
0 to 50
Phase driver withstand voltage
VDSS
ID=1mA (Tc=25°C)
100min
Recommended operating substrate temperature
Tc No condensation
0 to 105
Recommended Vref range
Vref Tc=105°C
0.14 to 1.38
Refer to the graph for each conduction-period tolerance range for the output current and brake current.
unit V V V V A
A
kHz V °C V
Electrical Characteristics at Tc = 25°C, VCC = 24V, VDD = 5.0V
Parameter
Symbol
Conditions
min typ
VDD supply current
ICCO
Pin 9 current CLOCK=GND
5.0
Output average current
Ioave
R/L=1Ω/0.62mH in each phase
0.362
0.402
FET diode forward voltage
Vdf If=1A (RL=23Ω)
1.0
Output saturation voltage
Vsat
RL=23Ω
0.42
Input leak current
IIL Pins 10, 12, 13, 14, 15, 17 =GND and 5V
Vref input bias current
IIB Pin 19 =1.0V
204
PWM frequency
fc
35 45
*Ioave values are for when the lead frame of the product is soldered to the mounting substrate.
Notes: A fixed-voltage power supply must be used.
max 9
0.442 1.6
0.61
±10
216 56
unit mA A V V
μA
μA kHz
No. A0755-2/19
Package Dimensions
unit:mm (typ)
29.2 25.6 (20.47)
STK672-600
4.5 2.0
(5.0)
(12.9) (5.0)
14.5 11.0 14.4 7.2
(R1.7) 1 19
1.0 (5.6) 18 1.0=18.0
0.52
(3.5)
4.2 0.4
8.2
14.5
(20.4)
Derating curve of motor current, IOH, vs. STK672-600 Operating substrate temperature, Tc
IOH - Tc
3.0
200Hz 2 phase excitation
2.5
Hold mode
2.0
Motor current, IOH - A
1.5
1.0
0.5
0 0 10 20 30 40 50 60 70 80 90 100 110
Operating Substrate Temperature, Tc- °C
ITF02548
Notes • The current range given above represents conditions when output voltage is not in the avalanche state. • If the output voltage is in the avalanche state, see the allowable avalanche energy for STK672-6** series hybrid ICs given
in a separate document. • The operating substrate temperature, Tc, given above is measured while the motor is operating.
Because Tc varies depending on the ambient temperature, Ta, the value of IOH, and the continuous or intermittent operation of IOH, always verify this value using an actual set.
No. A0755-3/19
Block Diagram
VDD=5V 9
MODE1 10 N.C 11
MODE2 17 CLOCK 12
CWB 13 RESETB 14 ENABLE 15
VSS 16 S.G 18 Vref 19
STK672-600
VDD
N.C N.C 87
Excitation m.