STK672-080 Sanyo Semicon Device, STK672-080 Datasheet
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STK672-080
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STK672-080 Summary of contents
Page 1
... Stepping Motor Driver (Sine Wave Drive) Output Current: 2.8 A (No Heat Sink*) Unipolar constant-current chopper (external excitation PWM) circuit with built-in microstepping controller Overview The STK672-080 is a stepping motor driver hybrid IC that uses power MOSFETs in the output stage. It includes a built-in microstepping controller and is based on a unipolar constant-current PWM system ...
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... A and B when the motor position is held fixed due to the adoption of external excitation. • The reference voltage Vref can be set to any level between 0 and 1 This allows the STK672-080 CC Specifications Absolute Maximum Ratings 25°C Parameter Maximum supply voltage1 ...
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... Vref 2W1-2, W1-2 Vref 2W1-2 Vref 2W1-2, W1-2, 1-2 Vref 2W1-2 Vref 2W1-2, W1-2 Vref 2W1-2 Vref 2 Vref PWM frequency fc Note: A constant-voltage power supply must be used. The design target value is shown for the current distribution ratio. STK672-080 Conditions = 1/8 = 2/8 = 3/8 = 4/8 = 5/8 = 6/8 = 7/8 Ratings Unit min typ max 100 % ...
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... Internal Block Diagram STK672-080 No. 6507-4/17 ...
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... To measuring fc: With SW1 set to the a position, set Vref and switch SW3. To measuring Icc: Set the ENABLE pin low STK672-080 SW2 B 3 STK672-080 SW3 A13258 SW1 A13260 No. 6507-5/17 ...
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... STK672-080 2 power is first applied to this hybrid IC 2= STK672-080 11 1 RESET 13 10 MoI 14 RoX Motor current waveform W1-2 phase excitation 2W1-2 phase excitation 2W1-2 phase excitation 4W1-2 phase excitation 1=10V to 45V ...
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... CWB Rotation direction setting (CW/CCW) 15 ENABLE Output cutoff M1, M2, M3 Excitation mode setting 13 RESET System reset 7 Vref Current setting STK672-080 Enable ØA (control signal) CR Divider oscillator 45kHz S R Noise Q Latch circuit filter AND Driver Block Basic Circuit Structure Pin circuit type ...
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... ENABLE is low: This hybrid IC goes to the hold state and excitation drive output (motor current) is forcibly turned off. In this mode, the hybrid IC system clock is stopped and no inputs other than the reset input have any effect on the hybrid IC state. STK672-080 CLK Input Acquisition Timing (M3 = Low) Excitation counter up/down ...
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... Phase excitation monitor Output Signal Functions and Timing • and B (Motor phase excitation outputs) Function —In the 4 phase and 2 phase excitation modes, a 3.75 µs (typical) interval is set up between the A and A and B and B output signal transition times. STK672-080 W1-2 phase excitation ...
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... Excitation phase according to the first clock input pulse after changing the excitation mode setting (M1 to M2) Excitation phase immediately before setting the excitation mode STK672-080 2W1-2 phase 1-2 phase ...
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... A 1-2 phase 2 phase phase 1-2 phase STK672-080 2W1-2 phase 1-2 phase W1-2 phase 1-2 phase ...
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... RESET CWB CLK MOI MOI 100% 92% 71% 40% Vref A 100% 92% 71% 40% Vref B STK672-080 1-2 Phase Excitation Timing Chart (M3= RESET CWB CLK MOI 100% 71% Vref A 100% 71% Vref B 2W1-2 Phase Excitation Timing Chart (M3= ...
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... M3 0 RESET CWB CLK MOI 100% 92% 83% 71% 55% 40% 20% Vref A 100% 92% 83% 71% 55% 40% 20% Vref B STK672-080 W1-2 Phase Excitation Timing Chart (M3= RESET CWB CLK MOI 100% 92% 71% 40% Vref A 100% 92% 71% 40% Vref B 4W1-2 Phase Excitation Timing Chart (M3=0) ...
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... I : Phase current peak value (A) OH t1: Phase current rise time (s) t2: Constant-current operating time (s) t3: Phase switching current regeneration time (s) STK672-080 fclock · ————— · (Vsat · Vdf · t3 fclock = 0.64 · {(Vsat + Vdf) · ——— · I ...
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... Vsat = I · Ron + I · Vdf = Vdf + I · The steady-state thermal resistance of a power MOSFET is 15.6°C/W. STK672-080 Tc max: Hybrid IC substrate temperature (°C) Ta: Application internal temperature (° Hybrid IC internal average loss ( the heat sink from the graphs shown below. 2 ...
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... Motor voltage — Reference Voltage vs. Input Current 450 400 350 300 250 200 150 100 0.5 1 1.5 Reference voltage, Vref — V STK672-080 Substrate temperature, Tc — °C Internal Diode Forward Voltage vs. Motor Current 1.6 1 ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of May, 2004. Specifications and information herein are subject to change without notice. STK672-080 ...