stk672-442b-e Sanyo Semiconductor Corporation, stk672-442b-e Datasheet
stk672-442b-e
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stk672-442b-e Summary of contents
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... Ordering number : EN*A1735 STK672-442B-E Overview The STK672-442B 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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... Drain-source cut-off current I DSS Notes *1: A fixed-voltage power supply must be used. *2: The value for Ioave assumes that the lead frame of the product is soldered to the mounting circuit board. STK672-442B-E Conditions No signal No signal Logic input pins 10μs, 1 pulse (resistance load =5V, CLOCK≥200Hz With an arbitrarily large heat sink ...
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... W1-2 4W1-2 4W1-2 2W1-2 4W1-2 2 Notes *3: The values given for Vref are design targets, no measurement is performed. Package Dimensions unit:mm (typ) 24.2 (18.4) (R1.47 1.0 0.5 18 1.0=18.0 STK672-442B-E Symbol Conditions θ=15/16, 16/16 θ=14/16 θ=13/16 θ=12/16 θ=11/16 θ=10/16 θ=9/16 θ=8/16 Vref *3 θ=7/16 θ=6/16 θ=5/16 θ=4/16 θ=3/16 θ=2/16 θ=1/16 4 ...
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... Derating Curve of Motor Current, I OH, vs. STK672-442B-E Operating Substrate Temperature, Tc 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 STK672-4** series hybrid ICs given in a separate document. • ...
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... MOI FAULT2 9 7 1÷4.9 Current divider ratio switching Phase V SS advance Pseudo sine counter wave generator Phase excitation signal Overheating generator Overcurrent detection detection PWM control SUB STK672-442B 2-phase stepping motor Vref P. ...
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... I OH ≈ (Vref ÷ 4.9) ÷ Rs ·················································································· (2) The value of 4.9 in Equation (2) above represents the Vref voltage as divided by a circuit inside the control IC. Rs: 0.122Ω (Current detection resistor inside the hybrid IC) STK672-442B-E 5V RO1 ...
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... Motor current peak value I OH setting [Smoke 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 STK672-442B-E to emit smoke because 5V circuits cannot be controlled. Function Table ...
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... RESET CWB CLK MOI 100% 92% 71% 40% A phase Vref 100% 92% 71% 40% B phase Vref STK672-442B-E 1-2-phase excitation timing charts (M3= RESET CWB CLK MOI 100% 71% A phase Vref 100% 71% B phase Vref ...
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... CWB CLK MOI 100% 97% 92% 83% 71% 55% 40% 20% A phase Vref 100% 97% 92% 83% 71% 55% 40% 20% B phase Vref STK672-442B-E W1-2-phase excitation timing charts (M3= RESET CWB CLK MOI 100% 92% 71% 40% A phase Vref 100% 92% 71% 40% ...
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... The reset signal is formed by the power-on reset function built into the HIC and the RESETB terminal. When activating the internal circuits of the HIC using the power-on reset signal within the HIC, be sure to connect Pin 14 of the HIC STK672-442B-E Pin Name MOI ...
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... Input pin 100k Ω The input pins of this driver all use Schmitt input. Typical specifications at Tc=25°C are given below. Hysteresis voltage is 0.3V (VIHa-VILa). When rising 1.8Vtyp Input voltage STK672-442B-E 4Vtyp At least 10 μ least 10 μ s <Configuration of the FAULT2 pin> 5V Output pin Pin (The buffer has an open drain configuration ...
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... Abnormality detection can be released by a RESETB operation or turning V DD voltage on/off. [MOI output] The output frequency of this excitation monitor pin varies depending on the excitation mode. For output operations, see the timing chart. STK672-442B-E <Configuration of the FAULT1 output pin> Output pin Pin 16 ...
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... When the current level drops, the voltage difference with the GND potential becomes smaller, making detection difficult. The motor currents that can be detected by motor terminal open detection are 0.6A or more with the STK672-422B-E, 0.9A or more with the STK672-432B-E, and 1.1A or more with the STK672-442B-E/440B-E. [Overcurrent detection] 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 ...
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... For V DSS , IAVL, and tAVL, be sure to actually operate the STK672-4** Series and substitute values when operations are observed using an oscilloscope. Ex DSS =110V, IAVL=1A, tAVL=0.2μs when using a STK672-442B-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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... Figure 2 Output Current and Voltage Waveforms 2 of the STK672-4** Series when Driving a 2-Phase Stepping Motor with Constant Current Chopping Figure 3 Allowable Loss Range, PAVL-I OH During STK672-442B-E Avalanche Operations Note: The operating conditions given above represent a loss when driving a 2-phase stepping motor with constant current chopping ...
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... Calculating STK672-442B-E HIC Internal Power Loss The average internal power loss in each excitation mode of the STK672-442B-E can be calculated from the following formulas. *1 [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) --------------------------- (4-1) 1-2 Phase excitation mode 1-2PdAVex= 2× ...
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... Then, determine if a heat sink is necessary by comparing with the Δ graph (see next page) based on the calculated average output loss, HIC. For heat sink design, be sure to see STK672-442B-E. The HIC average power, PdAVex described above, represents loss when not in avalanche mode. To add the loss in avalanche mode, be sure to add PAVL (4-13, 14) using the formula (3-2) for average power loss , PAVL, for STK672- 4** avalanche mode, described below to PdAVex described above ...
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... STK672-442B-E STK672-442B-E Output saturation voltage, Vsat - Output current 1.2 1.0 0.8 0.6 0.4 0 0.5 1.0 STK672-442B-E Forward voltage, Vdf -Output current 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0 0.5 1.0 Substrate temperature rise, ΔTc (no heat sink) - Internal average power dissipation, PdAV 0.5 Hybrid IC internal average power dissipation, PdAV - W Vsat - ...
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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 STK672-442B-E”. Calculate the internal HIC loss, PdAV, assuming repeat operation such as shown in Figure 1 below, since conduction ...
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... STK672-442B-E Figure 2 Substrate temperature rise, ΔTc - Internal average power dissipation, PdAV 0.5 Hybrid IC internal average power dissipation, PdAV - W Figure 3 Heat sink area (Board thickness: 2mm) - θc-a 100 1 ΔTc - PdAV 1.0 1.5 2.0 2.5 3.0 ITF02717 θc ...
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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 3.0 2.5 2.0 1.0 1.5 0.5 STK672-442B-E PdPK - Ambient Temperature °C 100 ...
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... To reduce noise caused by electromagnetic induction to small signal lines, do not design small signal lines (sensor signal lines, and 5V or 3.3V power supply signal lines) that run parallel in close proximity to the motor output line A (Pin 4), AB (Pin 5), B (Pin 3 (Pin 1) phases. STK672-442B ...
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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. STK672-442B-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. STK672-442B-E PS No.A1735-24/24 ...