STK672-440BN-E Datasheet, PDF (1/28 Pages) ON Semiconductor – 2-phase Stepper Motor Driver

Ordering number : ENA2248A
STK672-440BN-E
Thick-Film Hybrid IC
2-phase Stepper Motor Driver
http://onsemi.com
Overview
The STK672-440BN-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 motor terminal open detection function, overcurrent detection function, 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.
 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 STK672-432BN/-442BN-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
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
Unit
50
V
0.3 to 6.0
V
0.3 to 6.0
V
20
A
3.5
A
10
mA
8.3
W
3.1
W
105
°C
150
°C
40 to 125
°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.
ORDERING INFORMATION
See detailed ordering and shipping information on page 28 of this data sheet.
Semiconductor Components Industries, LLC, 2014
January, 2014 Ver. 2.0
10714HK/D0413HK 018-13-0053 No.A2248-1/28