stk672-632b-e Sanyo Semiconductor Corporation, stk672-632b-e Datasheet
stk672-632b-e
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stk672-632b-e Summary of contents
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... Ordering number : EN*A1738 STK672-632B-E Overview The STK672-632B 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). ...
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... Operation at the maximum V CC value may not be possible, depending on the motor current. See “8. Other Notes on Use” in the Data Sheet for details. *Ioave values are for when the lead frame of the product is soldered to the mounting substrate. Notes: A fixed-voltage power supply must be used. STK672-632B-E Conditions ENABLE=GND No signal Logic input pins 10μ ...
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... Derating curve of motor current, I OH, vs. STK672-632B-E Operating substrate temperature, Tc 3.0 2.5 2.0 1.5 1.0 0.5 Notes • The current range given above represents conditions when output voltage is not in the avalanche state. If the output voltage is in the avalanche state, see the allowable avalanche energy for STK672-6** series hybrid ICs given in a separate document. • ...
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... Phase FAB excitation signal FBO generator FBB Overcurrent Latch detection Circuit Output Latch open Circuit detection AI Current control BI chopper circuit Vref/4.9 Vref Amplifier STK672-632B phase stepping motor driver P. P. ...
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... At this time, use a device for the open collector driver that has output current specifications that pull the voltage down to less than 0.8V at Low level (less than 0.8V at Low level when I OL =5mA). [Current setting Vref] If the motor current is temporarily reduced, the circuit given below (STK672-632B-E, 632A-E, 630A >0.2A, STK672-642B-E, 640B-E, 640A- >0.3A) is recommended. R3 • ...
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... Emission Precuations] If Pin 18 (S.G terminal) is attached to the PCB without using solder, overcurrent may flow into the MOSFET (24V ON), causing the STK672-632B-E, 632A-E, 630A-E, STK672-642B-E, 640B-E, 640A-E to emit smoke because 5V circuits cannot be controlled. Input Pin Functions Pin Name Pin No. ...
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... Timing Charts 2-phase excitation V DD Power On Reset (or RESETB) MODE1 MODE2 CWB CLOCK ENABLE FAO FAB FBO FBB 1-2 phase excitation V DD Power On Reset (or RESETB) MODE1 MODE2 CWB CLOCK ENABLE FAO FAB FBO FBB STK672-632B-E No. A1738-7/24 ...
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... V DD Power On Reset (or RESETB) MODE1 MODE2 CWB CLOCK ENABLE FAO FAB FBO FBB 2 phase excitation → Switch to 1-2 phase excitation V DD Power On Reset (or RESETB) MODE1 MODE2 CWB CLOCK ENABLE FAO FAB FBO FBB STK672-632B-E No. A1738-8/24 ...
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... V DD Power On Reset (or RESETB) MODE1 MODE2 CWB CLOCK ENABLE FAO FAB FBO FBB 1-2 phase excitation (Hold operation results during fixed CLOCK Power On Reset (or RESETB) MODE1 MODE2 CWB CLOCK ENABLE FAO FAB FBO FBB STK672-632B-E Hold operation No. A1738-9/24 ...
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... V DD Power On Reset (or RESETB) MODE1 MODE2 CWB CLOCK ENABLE FAO FAB FBO FBB 1-2 phase excitation (MODE Power On Reset (or RESETB) MODE1 MODE2 CWB CLOCK ENABLE FAO FAB FBO FBB STK672-632B-E No. A1738-10/24 ...
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... If sudden stop is applied to the CLOCK signal used for motor rotation, the motor axis may advance beyond the theoretical position due to inertia. To stop at the theoretical position, the SLOW DOWN setting for gradually slowing the CLOCK cycle is required. STK672-632B-E 4V typ No time specification At least 10μs At least 10μ ...
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... Input voltage Input voltage specifications are as follows =2.5V min V IL =0.8V max <Configuration of the Vref input pin> Vref/4.9 − + Amplifier V SS STK672-632B-E <Configuration of the FAULT2 pin> Output pin Pin 8 50kΩ 50kΩ 50kΩ (The buffer has an open drain configuration.) VIHa < ...
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... MOSFET gate signal When the current level drops, the difference with the GND potential decreases, making detection difficult. The motor current that can be detected by motor terminal open detection is 0.5A or more with the STK672-632B-E/630B-E and 0.8A or more with the STK672-642B-E/640B-E. <Notes on the ENABLE high edge> ...
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... This hybrid IC is equipped with a function for detecting overcurrent that arises when the motor burns out or when there is a short between the motor terminals. Overcurrent detection occurs at 3.5A typ with the STK672-632B-E/630B-E, and 5.5A typ with the STK672-642B- E/640B-E. Current when motor terminals are shorted ...
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... Calculating STK672-632B-E HIC Internal Power Loss The average internal power loss in each excitation mode of the STK672-632B-E can be calculated from the following formulas. Each excitation mode 2-phase excitation mode 2PdAVex= 2×Vsat×0.5×CLOCK×I OH ×t2+0.5×CLOCK×I OH × (Vsat×t1+Vdf×t3) 1-2 Phase excitation mode 1-2PdAVex= 2× ...
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... STK672-632B-E Output saturation voltage, Vsat - Output current STK672-632B-E Forward voltage, Vdf -Output current Substrate temperature rise, ΔTc (no heat sink) - Internal average power dissipation, PdAV STK672-632B-E Vsat - I OH 1.0 0.8 0.6 0.4 0 0.5 1.0 1.5 2.0 Output current Vdf 1.4 1.2 1.0 0.8 0.6 0.4 0 0.5 1.0 1.5 2.0 Output current ΔTc - PdAV ...
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... For V DSS , IAVL, and tAVL, be sure to actually operate the STK672-6** Series and substitute values when operations are observed using an oscilloscope. Ex DSS =110V, IAVL=1A, tAVL=0.2μs when using a STK672-632B-E driver, the result is: PAVL=110×1×0.5×0.2×10 V DSS =110V is a value actually measured using an oscilloscope. ...
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... The operating conditions given above represent a loss when driving a 2-phase stepping motor with constant current chopping. Because it is possible to apply 2.6W or more =0A, be sure to avoid using the MOSFET body diode that is used to drive the motor as a zener diode. STK672-632B-E PAVL - ...
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... The size of heat sink for the HIC varies depending on the magnitude of the average power loss, PdAV, within the HIC. The value of PdAV increases as the output current increases. To calculate PdAV, refer to “Calculating Internal HIC Loss for the STK672-632B-E”. Calculate the internal HIC loss, PdAV, assuming repeat operation such as shown in Figure 1 below, since conduction ...
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... The figure below represents the allowable power loss, PdPK, vs. fluctuations in the ambient temperature, Ta. Power loss 2.8W is allowable at Ta=25°C, and 1.5W at Ta=60°C. * The package thermal resistance θc-a is 28.6°C/W. Allowable power dissipation, PdPK(no heat sink) - Ambient temperature, Ta STK672-632B-E ΔTc - PdAV 80 70 ...
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... Latch circuit ENABLE 15 FAULT1, FAULT1 16 FAULT2 signal Latch Over heat circuit detection S.G 18 Vref 19 CLOCK Phase A output current Phase AB output current STK672-632B FAULT2 N Phase excitation signal generation Over current R1 detection Output open detection AI ...
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... A (Pin 4), AB (Pin 5), B (Pin 3 (Pin 1) phases. 3) Pin 7 and Pin 11 of this product are N.C pins. Do not connect any wiring to these pins. STK672-632B ...
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... The oscillating voltage in excess of VFB is caused by LCRM (inductance, capacitor, resistor, mutual inductance) oscillation that includes micro capacitors C, not present in the circuit. Since M is affected by the motor characteristics, there is some difference in oscillating voltage according to the motor specifications. In addition, constant voltage drive without constant current drive enables motor rotation ≥ 0V. STK672-632B-E 9 Motor 2 ...
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... SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellectual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of June, 2010. Specifications and information herein are subject to change without notice. STK672-632B-E PS No. A1738-24/24 ...