Document
Ordering number : ENA1735A
STK672-442B-E
Thick-Film Hybrid IC
2-phase Stepping Motor Driver
http://onsemi.com
Overview
The STK672-442B-E is a hybrid IC for use as a unipolar, 2-phase stepping motor driver with PWM current control.
Applications
• Office photocopiers, printers, etc.
Features
• Built-in motor terminal open detection function (output current OFF). • Built-in overcurrent detection function (output current OFF). • Built-in 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. • A micro-step sine wave-driven driver can be activated merely by inputting an external clock. • External pins can be used to select 2, 1-2 (including pseudo-micro), W1-2, 2 W1-2, or 4W1-2 excitation. • The switch timing of the 4-phase distributor can be switched by setting an external pin (MODE3) to detect either the
rise and fall, or rise only, of CLOCK input. • 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 (0.122Ω: 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.
Semiconductor Components Industries, LLC, 2013 June, 2013
71311HKPC 018-11-0004/61610HKPC No.A1735-1/26
STK672-442B-E
Specifications
Absolute Maximum Ratings at Tc = 25°C
Parameter Maximum supply voltage 1 Maximum supply voltage 2 Input voltage Output current 1 Output current 2 Allowable power dissipation 1 Allowable power dissipation 2 Operating substrate temperature Junction temperature Storage temperature
Symbol VCC max VDD max VIN max IOP max IOH max PdMF max PdPK max Tc max Tj max Tstg
Conditions No signal No signal Logic input pins 10μs, 1 pulse (resistance load) VDD=5V, CLOCK≥200Hz With an arbitrarily large heat sink. Per MOSFET No heat sink Metal surface temperature of the package
Ratings 50
-0.3 to +6.0 -0.3 to +6.0
20 3.5 8.3 2.8 -20 to +105 150 -40 to +125
unit V V V A 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
Operating supply voltage 1
VCC
With signals applied
Operating supply voltage 2
VDD
With signals applied
Input high voltage
VIH Pins 10, 11, 12, 13, 14, 15, 17, VDD=5±5%
Input low voltage
VIL Pins 10, 11, 12, 13, 14, 15, 17, VDD=5±5%
Output current
IOH Tc=105°C, CLOCK≥200Hz
CLOCK frequency
fCL Minimum pulse width: at least 10μs
Recommended Vref range
Vref
Tc=105°C
Electrical Characteristics at Tc=25°C, VCC=24V, VDD=5.0V *1
Ratings 0 to 46 5±5%
2.5 to VDD 0 to 0.8 3.0 0 to 50
0.2 to 1.8
unit V V V V A kHz V
Parameter
Symbol
Conditions
min typ max unit
VDD supply current Output average current *2
ICCO Ioave
VDD=5.0V, ENABLE=Low R/L=1Ω/0.62mH in each phase
0.27
5.7 0.32
7.0 0.37
mA A
FET diode forward voltage
Output saturation voltage
Control input pin
Input voltage
5V level input current GND level input current Vref input bias current
FAULT1 pin
Output low voltage
5V level leakage current
Vdf Vsat VIH VIL
IILH
IILL IIB VOLF
IILF
If=1A (RL=23Ω) RL=23Ω Pins 10, 11, 12, 13, 14, 15, 17 Pins 10, 11, 12, 13, 14, 15, 17 Pins 10, 11, 12, 13, 14, 15, 17=5V
Pins 10, 11, 12, 13, 14, 15, 17=GND
Pin 19 =1.0V Pin 16 (IO=5mA) Pin 16 =5V
1 1.6 V
0.25
0.38
V
2.5
VDD
V
-0.3 0.8 V
50 75 μA
0.25
10 μA 1 μA
0.5 V
10 μA
FAULT2 pin
Motor terminal open detection output voltage Overcurrent detection output voltage
VOF1 VOF2
Pin 8 (when all protection functions have been activated)
0.0 0.01 2.4 2.5
0.2 2.6 V
Overheat detection output voltage
VOF3
3.1 3.3 3.5
Overheat detection temperature TSD
Design guarantee
144 °C
PWM frequency
fc
41 48 55 kHz
Drain-source cut-off current
Notes
IDSS
VDS=100V, Pins 2, 6, 9, 18=GND
1 μA
*1: A fixed-voltage power supply must be used.
*2: The value for Ioave assumes that the lead frame of the product is soldered to the mounting circuit board.
Continued on next page.
No.A1735-2/26
STK672-442B-E
Continued from preceding page.
Parameter
Symbol
Conditions
4W1-2 2W1-2 W1-2
1-2
θ=15/16, 16/16
4W1-2 2W1-2
θ=14/16
4W1-2
θ=13/16
4W1-2 2W1-2 W1-2
θ=12/16
4W1-2
θ=11/16
A•B Chopper Current Ratio
4W1-2 2W1-2
θ=10/16
4W1-2
θ=9/16
4W1-2 4W1-2
.