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STK672-442AN-E Fiches technique(PDF) 1 Page - ON Semiconductor |
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STK672-442AN-E Fiches technique(HTML) 1 Page - ON Semiconductor |
1 / 27 page 10914HK 018-13-0065 No.A2274 -1/27 Semiconductor Components Industries, LLC, 2014 January, 2014 Ver. 2.2 http://onsemi.com STK672-442AN-E Overview The STK672-442AN-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 (0.122Ω: 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 STK672-440AN/-430AN/-432AN-E. Specifications Absolute Maximum Ratings at Tc = 25 C Parameter Symbol Conditions Ratings Unit Maximum supply voltage 1 Vcc max No signal 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) 20 A Output current 2 IOH max VDD = 5V, CLOCK 200Hz 3.5 A Output current 3 IOF max 16pin Output current 10 mA Allowable power dissipation 1 PdMF max With an arbitrarily large heat sink. Per MOSFET 8.3 W 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 Thick-Film Hybrid IC 2-phase Stepper Motor Driver 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 27 of this data sheet. Ordering number : ENA2274 |
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