Thick-Film Hybrid STK672-110-E Unipolar Fixed-Current Choppe

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Thick-Film Hybrid STK672-110-E Unipolar Fixed-Current Choppe

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Ordering number EN6041A
Thick-Film Hybrid
STK672-110-E
Unipolar Fixed-Current Chopper (Self-Excited PWM) Scheme Built-in Phase Signal Distribution
Two-Phase Stepping Motor Driver (Square Wave Drive) Output Current 1.8A
STK672-110-E unipolar fixed-current chopper type 2-phase stepping motor driver hybrid features power MOSFETs output stage built-in phase signal distribution incorporation phase distribution allows STK672-110-E control speed motor based frequency external input clock signal. supports types excitation motor control: 2-phase excitation phase excitation. also provides function switching motor direction.
Applications
Two-phase stepping motor drive send/receive facsimile units Paper feed copiers, industrial robots, other applications that require 2-phase stepping motor drive
Features
motor speed controlled frequency external clock signal (the CLOCK signal). excitation type switched according state (low high) MODE pin. mode 2-phase phase excitation rising edge clock signal. motor direction switching (the pin) provided. inputs schmitt inputs (typical: +100%) pull-up resistors built motor current changing Vref voltage. Since 0.22 current detection resistor built current each 0.22V applied voltage. input frequency range clock signal used motor speed control 25kHz. Supply voltage ranges: 42V, 5.0V This supports motor operating currents 1.8A 105°C, 2.65A 25°C.
SANYO Semiconductor Co.,Ltd. products described contained herein are, with regard "standard application", intended general electronics equipment (home appliances, equipment, communication device, office equipment, industrial equipment etc.). products mentioned herein shall intended "special application" (medical equipment whose purpose sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level reliability directly threaten human lives case failure malfunction product cause harm human bodies, shall they grant guarantee thereof. should intend products applications outside standard applications customer considering such and/or outside scope intended standard applications, please consult with prior intended use. there consultation inquiry before intended use, customer shall solely responsible use. Specifications SANYO Semiconductor Co.,Ltd. products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer' products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer' products equipment.
61108HKIM/12799RM (OT) No.6041-1/9
STK672-110-E
Specifications
Maximum Ratings 25°C
Parameter Maximum supply voltage Maximum supply voltage Input voltage Output current Repeated avalanche capacity Allowable power dissipation Operating substrate temperature Junction temperature Storage temperature Symbol Tstg With arbitrarily large heat sink. MOSFET signal signal Logic input pins CLOCK 200Hz Conditions Ratings -0.3 +7.0 -0.3 +7.0 2.65 +125 Unit
Allowable Operating Ranges 25°C
Parameter Maximum supply voltage Maximum supply voltage Input voltage Output current Output current Clock frequency Phase driver withstand voltage Symbol IOH1 IOH2 VDSS 105°C, CLOCK 200Hz 80°C, CLOCK 200Hz motor curren (IOH) derating curve Minimum pulse width: 25°C) With signals applied With signals applied Conditions Ratings Unit
Electrical Characteristics 25°C, 24V,
Parameters supply current Output average current diode forward voltage Output saturation voltage High-level input voltage Low-level input voltage Input current Vref input voltage Vref input bias current Symbols ICCO Ioave Vsat Conditions CLOCK With 3/3.8mH each phase Vref 0.176V Pins pins) Pins pins) With pins ground level. Pull-up resistance: (typical) With 0.41 Rating 0.45 0.73 0.50 1.02 unit
Note: fixed-voltage power supply must used.
Package Dimensions
unit:mm (typ) 4168
32.5
26.0
2=22
No.6041-2/9
Excitation mode selection
MODE
CLOCK Phase advance counter Chopping circuit VrefB VrefA
Phase excitation signal generation
Internal Equivalent Circuit Block Diagram
RESETB
STK672-110-E
time setting
Vref
ITF02596
No.6041-3/9
STK672-110-E
Sample Application Circuit
STK672-110-E
VDD=5V CLOCK MODE RESETB Vref 0.1F
ITF02597
Two-phase stepping motor
least 100F P.GND
minimize noise system, locate ground side capacitor above circuit close possible Insert resistor 100) that discharge energy from capacitor directly applied CMOS this hybrid device. diode characteristics with less than equal 0.6V (when 0.1A), this will smaller than CMOS input diode this case replaced with short without problem. Standard type input levels used inputs. open-collector type circuits used inputs, these circuit will high-impedance state high level inputs. result, chopping circuit noise cause input circuits operate incorrectly. prevent incorrect operation such noise, capacitors with values between 1000pF must connected between pins capacitor with value between 1000pF must connected between pins well open-collector output used RESETB (pin input.) Taking input bias current (IIB) characteristics into account, resistor must exceed 100k. following circuit (for lowered current over 0.2A) recommended application needs temporarily lower motor current. Here, value close 100k must used resistor make transistor output saturation voltage possible.
Vref Vref
No.6041-4/9
STK672-110-E
Input Functions (CMOS input levels)
CLOCK MODE RESETB Function Reference clock motor phase current switching Excitation mode selection Motor direction switching System reset outputs cutoff. Applications must apply reset signal least when power first applied. Input conditions when operating Operates rising edge signal Low: 2-phase excitation High: phase excitation Low: (forward) High: (reverse) reset applied level
simple reset function formed from CO4, this application circuit. With CLOCK input held low, when supply voltage brought reset applied motor output phases driven. supply voltage rise time slow (over 50ms), motor output phases driven. Increase value capacitor check circuit operation again. timing chart concrete details circuit operation.
Usage Notes
system input pins [RESETB CLOCK (Input signal timing when power first applied)] shown timing chart, RESETB signal input required driver operate with timing which gate turned first. RESETB signal timing must have width least 20s, shown below. capacitor resistor application circuit form simple reset circuit that uses time constant rising time. However, when designing RESETB input based CMOS levels, application must have timing shown figure
Rise supply voltage
RESETB signal input
least CLOCK signal
least
Figure RESETB CLOCK Signals Input Timing timing chart details CLOCK, MODE, CWB, other input pins. [Vref <Motor current peak value setting>] sample application circuit, peak value motor current (IOH) RO1, RO2, (5V) described formula below.
Figure Motor Current Flowing into Driver Vref Here, hybrid internal current detection resistor Vref (R02 (R01 R02)) STK672-110-E: 0.22
No.6041-5/9
STK672-110-E
Allowable motor current operating range motor current (IOH) must held within range corresponding area under curve shown figure example, operating substrate temperature 105°C, then must held under 1.8A, hold mode must held under 1.5A. Thermal design [Operating range which heat sink used] STK672-110-E package structure that uses screws, recommended without heat sink. This section discusses safe operating range when heat sink used. maximum ratings specifications, specified 105°C, when mounted actual product system, value must never exceeded during operation. expressed formula below, thus range must stipulated that always under 105°C. Hybrid ambient temperature, Temperature increase across aluminum substrate shown figure value increases hybrid internal average power dissipation increases. shown figure increases with motor current. Here describe actual calculation using example shown motor current timing chart figure Since there periods when current flows periods when current during actual motor operation, cannot determined from data presented figure Therefore, calculate assuming that actual motor operation consists repetitions operation shown figure
Motor phase current (sink side)
-IO1
Figure Motor Current Timing Motor rotation operation time Motor hold operation time Motor current time reduced, depending application. Single repeated motor operating cycle IO2: Motor current peak values structure motor windings, phase current positive negative current with pulse form. Note that figure presents concepts here, that on/off duty actual signals will differ. hybrid internal average power dissipation calculated from following formula. (Here, IO2) value calculated formula above under 1.4W, then from figure that operation allowed ambient temperature 60°C. While operating range when heat sink used determined from formula above, figure merely single example operating mode single motor. example, while figure shows 2-phase excitation motor, phase excitation used with 500Hz clock frequency, drive will turned time dissipation will reduced that figure extremely difficult SANYO calculate internal average power dissipation possible product conditions. After performing above rough calculations, always install hybrid actual product verify that substrate temperature does rise above 105°C.
No.6041-6/9
STK672-110-E
Timing Chart
2-phase excitation
MODE RESETB CLOCK Gate Gate Gate Gate 100% VrefA 100% VrefB
ITF02598
phase excitation
MODE RESETB CLOCK Gate Gate Gate Gate 100% VrefA 100% VrefB
ITF02599
No.6041-7/9
STK672-110-E
phase excitation (CWB)
MODE RESETB CLOCK Gate Gate Gate Gate 100% VrefA 100% VrefB
ITF02600
Switching from 2-phase phase excitation
MODE RESETB CLOCK Gate Gate Gate Gate 100% VrefA 100% VrefB
ITF02601
No.6041-8/9
STK672-110-E
Figure
2.65
Hybrid internal average power dissipation,
VCC=24V Motor: R=0.4 L=1.2mH
Operating region when fCL200Hz
Figure
Motor current,
Operating region hold mode
VCC=24V, VDD=5.0V Clock=500Hz Continuous 2-phase excitation operation Motor used: R=0.63 L=0.62mH data typical values.
ITF02603
Operating substrate temperature, Figure
ITF02602
Motor current,
Substrate temperature rise,
With heat sink, vertical, convection cooling
ITF02604
Hybrid internal average power disspation,
SANYO Semiconductor Co.,Ltd. assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges, other parameters) listed products specifications SANYO Semiconductor Co.,Ltd. products described contained herein. SANYO Semiconductor Co.,Ltd. strives supply high-quality high-reliability products, however, semiconductor products fail malfunction with some probability. possible that these probabilistic failures malfunction could give rise accidents events that could endanger human lives, trouble that could give rise smoke fire, accidents that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO Semiconductor Co.,Ltd. products described contained herein controlled under applicable local export control laws regulations, such products require export license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written consent SANYO Semiconductor Co.,Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO Semiconductor Co.,Ltd. product that intend use. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. Upon using technical information products described herein, neither warranty license shall granted with regard intellectual property rights other rights SANYO Semiconductor Co.,Ltd. third party. SANYO Semiconductor Co.,Ltd. shall liable claim suits with regard third party's intellectual property rights which resulted from technical information products mentioned above.
This catalog provides information June, 2008. Specifications information herein subject change without notice.
No.6041-9/9

Thick-Film Hybrid STK672-110-E Unipolar Fixed-Current Choppe

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