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PDF BD68620EFV Data sheet ( Hoja de datos )
| Número de pieza | BD68620EFV | |
| Descripción | 36V Stepping Motor Driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
36V Stepping Motor Driver
BD68620EFV
●General Description
BD68620EFV is a bipolar low-consumption driver that
driven by PWM current. Rated power supply voltage of
the device is 36 V, and rated output current is 2.0A.
PALA-IN driving mode is adopted for input interface. In
terms of current decay, the FAST DECAY/SLOW
DECAY ratio may be set without any limitation, and all
available modes may be controlled in the most
appropriate way. In addition, the power supply may be
driven by one single system, which simplifies the
design.
●Features
■ Rated output current（DC）2.0A
■ Low ON resistance DMOS output
■ PALA-IN drive mode
■ PWM constant current (other oscillation)
Built-in spike noise cancel function (external noise
filter is unnecessary)
■ Full-, half (two kinds)-, quarter-step functionality
■ Current decay mode switch
（linearly variable FAST/SLOW DECAY ratio）
■ Power save function
■ Built-in logic input pull-down resistor
■ Thermal shutdown circuit (TSD)
■ Over-current protection circuit（OCP）
■ Under voltage lock out circuit (UVLO)
■ Over voltage lock out circuit (OVLO)
■ Ghost Supply Prevention (protects against
malfunction when power supply is disconnected)
■ Microminiature, ultra-thin and high heat-radiation
(exposed metal type) package
●Application
■ PPC, multi-function printer, laser beam printer, and
ink-jet printer
■ Monitoring camera and WEB camera
■ Sewing machine
■ Photo printer, FAX, scanner and mini printer
■ Toy and robot
●Major Characteristics
■ Range of power supply
19～28 [V]
voltage
■ Rated output current
2.0 [A]
(peak value)
■ Range of operating
-25～+85 [℃]
temperature
■ Output ON resistance
0.95 [Ω] (Typ.)
(total of upper and
lower resistors)
●Package
W(Typ.) x D(Typ.)x H(Max.)
HTSSOP-B24
7.80mm x 7.60mm x 1.00mm
●Basic application circuit
PHASE1 12
PHASE2 13
I01 14
I11 15
I02 16
I12 17
18 GND
11 PS
VREF 9
5 VCC1
4 OUT1A
2 OUT1B
3 RNF1
CR 7
MTH 8
20 VCC2
22 OUT2A
24 OUT2B
23
RNF2
1 GND
Figure 1. BD68620EFV application circuit diagram
○Product structure：silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○It is not the radiation-proof design for this product.
1/19
TSZ02201-0P2P0B700140-1-2
30.May.2014 Rev.002
1 page  
BD68620EFV
Datasheet
●Function explanation
○PS／Power save terminal
PS can make circuit standby state and make motor output OPEN. When PS=L⇒H, please be careful because there is a
delay of 40μs(max.) before it is returned from standby state to normal state and the motor output becomes ACTIVE.
PS Status
L Standby state
H ACTIVE
○PHASE1,PHASE2／Phase selection terminal
PHASE1
PHASE2
OUT1A
L LL
H LH
L HL
H HH
OUT1B
H
L
H
L
OUT2A
L
L
H
H
OUT2B
H
H
L
L
○I01,I02,I11,I12／VREF division ratio setting terminal
I0x I1x Output current level(%)
LL
100
HL
67
LH
33
HH
(I0X, I1X)=(H, H): motor outputs are open.
0
○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. Please increase the capacity if needed
especially when a large current is used or those motors that have great back electromotive force are used.
In addition, for the purpose of reducing of power supply’s impedance in wide frequency bandwidth, parallel connection of
multi-layered ceramic capacitor of 0.01μ～0.1μF etc is recommended. Extreme care must be used to make sure that the
voltage VCC does not exceed the rating even for a moment.
VCC1 & VCC2 are shorted inside IC, so please be sure to short externally VCC1 & VCC2 when using. If used without
shorting, malfunction or destruction may occur because of concentration of current routes etc., so please make sure that
they are shorted when in use. Still more, in the power supply terminal, there is built-in clamp component for preventing of
electrostatic destruction. If steep pulse or voltage of surge more that maximum absolute rating is applied, this clamp
component operates, as a result there is the danger of destruction, so please be sure that the maximum absolute rating
must not be exceeded. It is effective to mount a Zener diode of about the maximum absolute rating. Moreover, the diode for
preventing of electrostatic destruction is inserted between VCC terminal and GND terminal, as a result there is the danger
of IC destruction if reverse voltage is applied between VCC terminal and GND terminal, so please be careful.
○GND／Ground terminal
In order to reduce the noise caused by switching current and to stabilize the internal reference voltage of IC, please wire in
such a way that the wiring impedance from this terminal is made as low as possible to achieve the lowest electrical potential
no matter what operating state it may be. Moreover, please design patterns not to have any common impedance with other
GND patterns.
○OUT1A,OUT1B,OUT2A,OUT2B／H Bridge output 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. It is
also effective to add a Schottky diode if output has positive or negative great fluctuation when large current is used etc, for
example, if counter electromotive voltage etc. is great. Moreover, in the output terminal, there is built-in clamp component
for preventing of electrostatic destruction. If steep pulse or voltage of surge more than maximum absolute rating is applied,
this clamp component operates, as a result there is the danger of even destruction, so please be sure that the maximum
absolute rating must not be exceeded.
○RNF1,RNF2／Connection terminal of resistor for detecting of output current
Please connect the resistor of 0.1Ω～0.3Ω for current detection between this terminal and GND In view of the power
consumption of the current-detecting resistor, please determine the resistor in such a way that W=IOUT2･R[W] does not
exceed the power dissipation of the resistor. In addition, please wire in such a way that it has a low impedance and does
not have a impedance in common with other GND patterns because motor’s drive current flows in the pattern through RNF
terminal～current-detecting resistor～GND. Please do not exceed the rating because there is the possibility of circuits’
malfunction etc. if RNF voltage has exceeded the maximum rating (0.7V). Moreover, please be careful because if RNF
terminal is shorted to GND, large current flows without normal PWM constant current control, then there is the danger that
OCP or TSD will operate. If RNF terminal is open, then there is the possibility of such malfunction as output current does
not flow either, so please do not let it open.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/19
TSZ02201-0P2P0B700140-1-2
30.May.2014 Rev.002
5 Page 
BD68620EFV
Datasheet
HALF STEP B
Controlled by 6 logic signals of PHASE1,PHASE2, I01,I11,I02, and I12
①②③④⑤⑥⑦⑧
PHASE1
PHASE2
I01
I11
I02
I12
IOUT(CH1)
100%
67%
33%
-33%
-67%
-100%
IOUT(CH2)
100%
67%
33%
-33%
-67%
-100%
100%
67%
33%
OUT2B
OUT1A
1
82
73
64
5
OUT1B
OUT2A
QUARTER STEP
Controlled by 6 logic signals of PHASE1,PHASE2, I01,I11,I02, and I12
①②③④⑤⑥⑦⑧⑨⑩⑪⑫⑬⑭⑮⑯
PHASE1
PHASE2
I01
I11
I02
I12
IOUT(CH1)
100%
67%
33%
-33%
-67%
-100%
IOUT(CH2)
100%
67%
33%
-33%
-67%
-100%
100%
67%
33%
OUT2B
OUT1A
16 1 22
15
14
13
12
11
10 9 8
3
4
5
6
7
OUT1B
OUT2A
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/19
TSZ02201-0P2P0B700140-1-2
30.May.2014 Rev.002
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet BD68620EFV.PDF ] | |
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