bd63847 ROHM Co. Ltd., bd63847 Datasheet
bd63847
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bd63847 Summary of contents
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... Stepper Motor Driver series Micro step 36V Stepper Motor Drivers BD63847/BD63843EFV (CLK-IN type) ●Outline BD6384□EFV series are stepper motor drivers of 1/16 micro step(sixteenth step) drive. As for its basic function low power consumption bipolar PWM constant current-drive driver with power supply rated voltage of 36V and rated output current (DC) of 1.0A, 2.0A. The input interface is CLK-IN type. There are step modes of Full step & ...
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... Control input (CLK, CW_CCW, MODE0, MODE1, ENABLE, PS) H level input voltage L level input voltage H level input current L level input current Output (OUT1A, OUT1B, OUT2A, OUT2B) Output ON resistance (BD63847EFV) Output ON resistance (BD63843EFV) Output leak current Current control RNFXS input current RNFX input current ...
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... BD63847/63843EFV ●Input output equivalent circuit diagram VCC Circuitry 10kΩ Control input 100kΩ MTH RNF1S 5kΩ RNF2S OUT1A OUT2A www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. VREF VCC CR Circuitry Fig.1 Input output equivalent circuit diagram 3/19 Technical Note 500Ω ...
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... BD63847/63843EFV ●Terminal function and Application circuit diagram Pin No. Pin name 1 GND Ground terminal 2 OUT1B H bridge output terminal Connection terminal of resistor for 3 RNF1 output current detection Input 4 RNF1S comparator 5 OUT1A H bridge output terminal 6 NC Non connection 7 VCC1 Power supply terminal 8 NC Non connection ...
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... BD63847/63843EFV ●Points to notice for terminal description and PCB layout ○CLK/Clock input terminal for advancing the electrical angle CLK is reflected at rising edge. The Electrical angle advances by one for each CLK input. Motor’s misstep will occur if noise is picked up at the CLK terminal, so please design the pattern in such a way that there is no noise plunging. ○ ...
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... BD63847/63843EFV ○VCC1,VCC2/Power supply terminal Motor’s drive current is flowing in it, so please wire in such a way that the wire is thick & short and has low impedance. Voltage VCC may have great fluctuation, so please arrange the bypass capacitor of about 100µ~470µF as close to the terminal as possible and adjust in such a way that the voltage VCC is stable ...
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... BD63847/63843EFV ○CR/ Connection terminal of CR for setting chopping frequency This is the terminal to set the chopping frequency of output. Please connect the external C(470p~1500pF) and R(10k~200kΩ) between this terminal and GND. Please refer to P8. Please interconnect from external components to GND in such a way that the interconnection does not have impedance in common with other GND patterns ...
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... BD63847/63843EFV ●PWM Constant current control 1) Current control operation When the output transistor is turned on, the output current increases, raising the voltage over the current sense resistor. When the voltage on the RNF pin reaches the voltage value set by the internal 4-bit DAC and the VREF input voltage, the current limit comparator engages and enters current decay mode ...
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... BD63847/63843EFV ●Current decay mode The IC allows for a mixed decay mode in which the ratio of fast and slow decay can be optionally set. The following diagrams show the operating state of each transistor and the regenerative current path during attenuation for each decay mode: FAST DECAY ON→ ...
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... BD63847/63843EFV ●Translator circuit This series builds in translator circuit and can drive stepper motor in CLK-IN mode. The operation of the translator circuit in CLK-IN drive mode is described as below. ○Reset operation The translator circuit is initialized by power ON Reset function and PS terminal. ・Initializing operation when power supply is turned on ① ...
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... BD63847/63843EFV ●Step sequence table(CW_CCW=L、Initial electrical angle=step angle 45°) Full step Half step Initial position→ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/8 step 1/16 step ch1 current[%] ch2 current[%] step angle[° ...
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... BD63847/63843EFV ・Reset timing chart (FULL STEP, MODE0=L, MODE1=L, CW_CCW=L , ENABLE=H) If the terminal PS is input to L, the reset operation is done with regardless of other input signals when reset the translator circuit while motor is working. At this time, IC internal circuit enters the standby mode, and makes the motor output OPEN. ① ...
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... BD63847/63843EFV ・ENABLE Switch timing chart (FULL STEP, MODE0=L, MODE1=L) The switch of the ENABLE signal is reflected by the change in the ENABLE signal with regardless of other input signals. During ENABLE=L, the motor output becomes OPEN and the electrical angle doesn't advance. Because the translator circuit stop and CLK input is canceled ...
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... BD63847/63843EFV ●Protection Circuits ○Thermal Shutdown (TSD) This IC has a built-in thermal shutdown circuit for thermal protection. When the IC’s chip temperature rises above 175°C (Typ.), the motor output becomes OPEN. Also, when the temperature returns to under 150°C (Typ.), it automatically returns to normal operation ...
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... CR. See P.8 for details. chop Model Number BD63847EFV BD63843EFV Consumed power of total IC W_total [W] = ① + ② Junction temperature Tj = Ta[°C] + θ However, the thermal resistance valueθ derating curve on P.16. Also, we are taking measurements of thermal resistance valueθ ...
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... BD63847/63843EFV ●Thermal derating curve HTSSOP-B28 has exposed metal on the back, and it is possible to dissipate heat from a through hole in the back. Also, the back of board as well as the surfaces has large areas of copper foil heat dissipation patterns, greatly increasing power dissipation. The back metal is shorted with the back side of the IC chip, being a GND potential, therefore there is a possibility for malfunction shorted with any potential other than GND, which should be avoided ...
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... BD63847/63843EFV (1) Absolute maximum ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses ...
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... BD63847/63843EFV (12) Input terminal of IC This monolithic IC, and between each element there isolation for element partition and a P substrate. This P layer and each element’s N layer make up the P-N junction, and various parasitic elements are made up. For example, when the resistance and transistor are connected to the terminal as shown in figure A, ○ ...
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... BD63847/63843EFV 5th, 2010, April. 1st 2009, January Catalog No.09T000A '09.1 ROHM © 1000 NZ Published by LSI Business Promotion Group www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 19/19 Technical Note 2010.4 - Rev.A ...