Document
Ordering number : ENA2295
STK672-432AN-E
Thick-Film Hybrid IC
2-phase Stepper Motor Driver
http://onsemi.com
Overview
The STK672-432AN-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 overcurrent detection function, overheat detection function (output current OFF). FAULT1 signal (active low) is output when overcurrent or overheat is detected. The FAULT2 signal is used to output the result of activation of protection circuit detection at 2 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 (0.152Ω: 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. PWM operation is separately excited system. As for PWM phase the constant current control
which shifts the phase of Ach Bch. Supports compatible pins with STK672-430AN/-440AN/-442AN-E.
Specifications
Absolute Maximum Ratings at Tc = 25C
Parameter Maximum supply voltage 1 Maximum supply voltage 2 Input voltage Output current 1 Output current 2 Output current 3 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 IOF max PdMF max PdPK max Tcmax Tjmax Tstg
Conditions No signal No signal Logic input pins 10μs 1 pulse (resistance load) VDD = 5V, CLOCK 200Hz 16pin Output current With an arbitrarily large heat sink. Per MOSFET No heat sink
Ratings
52 0.3 to 6.0 0.3 to 6.0
10 2.5 10 7.3 2.8 105 150 40 to 125
Unit V V V 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 26 of this data sheet.
Semiconductor Components Industries, LLC, 2014 February 2014 Ver. 2.2
22614HK 018-13-0069 No.A2295-1/26
STK672-432AN-E
Allowable Operating Ranges at Tc=25C
Parameter Operating supply voltage 1 Operating supply voltage 2 Input high voltage Input low voltage CLOCK frequency Output current Recommended operating substrate temperature Recommended Vref range
Symbol VCC VDD VIH VIL fCL IOH
Tc
Vref
Conditions With signals applied With signals applied Pins 10, 11, 12, 13, 14, 15, 17, VDD=55% Pins 10, 11, 12, 13, 14, 15, 17, VDD=55% Minimum pulse width: at least 10s Tc=105C, CLOCK200Hz
No condensation
Tc=105C
Ratings 0 to 42 55%
2.5 to VDD 0 to 0.8 0 to 50 2.0
0 to 105
0.14 to 1.48
unit V V V V kHz A
C
V
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability.
Electrical Characteristics at Tc=25C, VCC=24V, VDD=5.0V *1
Parameter
Symbol
Conditions
min typ max
VDD supply current Output average current *2
ICCO Ioave
VDD=5.0V, ENABLE=Low R/L=1/0.62mH in each phase
0.19
5.7 0.23
7.0 0.27
FET diode forward voltage Output saturation voltage
Input voltage
Control input pin
5V level input current
GND level input current
Vref input bias current
FAULT1 pin
Output low voltage 5V level leakage current
Overcurrent detection output
FAULT2
voltage
pin Overheat detection output
voltage
Overheat detection temperature
Vdf Vsat VIH VIL IILH IILL IIB VOLF IILF
VOF2
VOF3
TSD
If=1A (RL=23) RL=23 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
Pin 8 (when all protection functions have been activated)
Design guarantee
2.5 0.3
2.4 3.1
1 0.35
50 10 0.25
2.5 3.3 144
1.6 0.5 VDD 0.8 75 10 15 0.5 10
2.6
3.5
PWM frequency
fc
41 48 55
Drain-source cut-off current 4W1-2 2W1-2 W1-2
IDSS 1-2
VDS=100V, Pins 2, 6, 9, 18=GND =15/16, 16/16
1 100
4W1-2 2W1-2
=14/16
97
4W1-2
=13/16
95
4W1-2 2W1-2 W1-2
=12/16
93
4W1-2
=11/16
87
AB Chopper Current Ratio
4W1-2 2W1-2
=10/16
83
4W1-2
=9/16
77
4W1-2 4W1-2
2W1-2
W1.