Ordering number : ENA2297
STK672-632AN-E
Thick-Film Hybrid IC
2-phase Stepper Motor Driver
http://onsemi.com
Overview
The STK672-632AN-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).
FAULT signal (active low) is output when overcurrent or overheat is detected.
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.
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 (0.141Ω: 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 STK672-630AN/-640AN/-642AN-E.
Specifications
Absolute Maximum Ratings at Tc = 25C
Ratings
Unit
Maximum supply voltage 1
Parameter
VCC max
Symbol
No signal
Conditions
52
V
Maximum supply voltage 2
VDD max
No signal
0.3 to 6.0
V
Input voltage
Vin max
Logic input pins
0.3 to 6.0
V
Output current 1
IOP max
10μs 1 pulse (resistance load)
Output current 2
IOH max
VDD = 5V, CLOCK 200Hz
Output current 3
IOF max
Allowable power dissipation 1
PdMF max
Allowable power dissipation 2
PdPK max
No heat sink
2.8
W
Operating substrate temperature
Tcmax
105
°C
Junction temperature
Tjmax
150
°C
Storage temperature
Tstg
40 to 125
°C
10
A
2.65
A
16pin Output current
10
mA
With an arbitrarily large heat sink. Per MOSFET
7.3
W
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 28 of this data sheet.
Semiconductor Components Industries, LLC, 2014
February, 2014 Ver. 2.2
22514HK 018-13-0064 No.A2297-1/28
