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PDF BD63843EFV Data sheet ( Hoja de datos )
| Número de pieza | BD63843EFV | |
| Descripción | Stepping Motor Drivers | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Stepping Motor Driver series
Micro step 36V
Stepping Motor Drivers
BD63843EFV, BD63847EFV
No.12009EAT08
●Description
BD63843EFV / BD63847EFV are stepping motor drivers of 1/16 micro step(sixteenth step) drive. As for its basic function, it
is a 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 & Half step, Eighth step, Sixteenth step mode by internal DAC (D-A converter), and for
current decay mode, the ratio of FAST DECAY & SLOW DECAY can be freely set, so the optimum control conditions for
every motor can be realized. In addition, being able to drive with one system of power supply makes contribution to the set
design’s getting easy.
●Feature
1) Single power supply input (rated voltage of 36V)
2) Rated output current:(DC) 1.0A, 2.0A
3) Low ON resistance DMOS output
4) CLK-IN drive mode
5) PWM constant current control (other oscillation)
6) Built-in spike noise cancel function (external noise filter is unnecessary)
7) Full step, Half step, Eighth step, Sixteenth step drive
8) Timing free for changing step modes
9) Current decay mode switching function (linearly variable FAST/SLOW DECAY ratio)
10) Normal rotation & reverse rotation switching function
11) Power save function
12) Built-in logic input pull-down resistor
13) Power-on reset function
14) Thermal shutdown circuit (TSD)
15) Over current protection circuit (OCP)
16) Under voltage lock out circuit (UVLO)
17) Over voltage lock out circuit (OVLO)
18) Ghost Supply Prevention (protects against malfunction when power supply is disconnected)
19) Electrostatic discharge: 8kV (HBM specification)
20) Adjacent pins short protection
21) Inverted mounting protection
22) Microminiature, ultra-thin and high heat-radiation (exposed metal type) HTSSOP-B28 package
23) Pin-compatible line-up (In addition, pin-compatible to BD6387□EFV series)
●Application
PPC, multi-function printer, laser beam printer, ink jet printer, monitoring camera, WEB camera, sewing machine, photo
printer, FAX, scanner, mini printer, toy, and robot etc.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
1/8
2012.02 - Rev.A
1 page  
BD63843EFV, BD63847EFV
Technical Note
○Under Voltage Lock Out (UVLO)
This IC has a built-in under voltage lock out function to prevent false operation such as IC output during power supply under
voltage. When the applied voltage to the VCC terminal goes under 15V (Typ.), the motor output is set to OPEN. This
switching voltage has a 1V (Typ.) hysteresis to prevent false operation by noise etc. Please be aware that this circuit does
not operate during power save mode. Also, the electrical angle is reset when the UVLO circuit operates during CLK-IN drive
mode.
○Over Voltage Lock Out (OVLO)
This IC has a built-in over voltage lock out function to protect the IC output and the motor during power supply over voltage.
When the applied voltage to the VCC terminal goes over 32V (Typ.), the motor output is set to OPEN. This switching
voltage has a 1V (Typ.) hysteresis and a 4µs (Typ.) mask time to prevent false operation by noise etc. Although this over
voltage locked out circuit is built-in, there is a possibility of destruction if the absolute maximum value for power supply
voltage is exceeded, therefore the absolute maximum value should not be exceeded. Please be aware that this circuit does
not operate during power save mode.
○Ghost Supply Prevention (protects against malfunction when power supply is disconnected)
If a signal (logic input, VREF, MTH) is input when there is no power supplied to this IC, there is a function which prevents
the false operation by voltage supplied via the electrostatic destruction prevention diode from these input terminals to the
VCC to this IC or to another IC’s power supply. Therefore, there is no malfunction of the circuit even when voltage is
supplied to these input terminals while there is no power supply.
●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 if it is shorted with any potential other than GND, which should be avoided. Also, it is
recommended that the back metal is soldered onto the GND to short. Please note that it has been assumed that this
product will be used in the condition of this back metal performed heat dissipation treatment for increasing heat dissipation
efficiency.
5.0 4.70W
4
Measurement machine：TH156（Kuwano Electric）
Measurement condition：ROHM board
Board size：70mm*70mm*1.6mm
(With through holes on the board)
The exposed metal of the backside is connected to the board with solder.
4.0
3.30W
3
3.0
2.0 1.85W 2
Board①：1-layer board (Copper foil on the back 0mm)
Board②：2-layer board (Copper foil on the back 15mm*15mm)
Board③：2-layer board (Copper foil on the back 70mm*70mm)
Board④：4-layer board (Copper foil on the back 70mm*70mm)
Board①：θja=86.2°C W
Board②：θja=67.6°C W
Board③：θja=37.9°C W
Board④：θja=26.6°C W
1.0
1.45W
1
0
25
50
75 85 100
125 150
Ambient temperature:Ta[C]
Fig.2 HTSSOP-B28 Thermal derating curve
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
5/8
2012.02 - Rev.A
5 Page 
Datasheet
General Precaution
1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.
ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny
ROHM’s Products against warning, caution or note contained in this document.
2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior
notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s
representative.
3. The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or
liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or
concerning such information.
Notice – WE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.001
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet BD63843EFV.PDF ] | |
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