bd63847 ROHM Co. Ltd., bd63847 Datasheet - Page 4

• Manufacturer Part Number: bd63847
• Description: Micro Step 36v Stepper Motor Drivers
• Manufacturer: ROHM Co. Ltd.

Set the current decay mode.
①SLOW DECAY
⇒Connect to GND.
②MIX DECAY
⇒Input by resistor divison.
Refer to P.7, 9 for detail.
●Terminal function and Application circuit diagram
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BD63847/63843EFV
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Pin No.
Logic input terminal.
Refer to P.5 for detail.
Set the output currenet.
Input by resistor divison.
Refer to P.6 for detail.
Set the chopping frequency.
Setting range is
C:470pF~1500pF
R:10kΩ~200kΩ
Refer to P.7, 8 for detail.
10
12
13
14
11
1
2
3
4
5
6
7
8
9
39kΩ
Pin name
OUT1B
RNF1S
OUT1A
RNF1
VCC1
VREF
GND
GND
MTH
NC
NC
CR
NC
PS
1000pF
CW_CCW
Ground terminal
H bridge output terminal
Connection terminal of resistor for
output current detection
Input
comparator
H bridge output terminal
Non connection
Power supply terminal
Non connection
Ground terminal
Connection terminal of CR for setting
chopping frequency
Non connection
Current decay mode setting terminal
Output current value setting terminal
Power save terminal
ENABLE
MODE0
MODE1
VREF
TEST
MTH
CLK
Terminal for testing.
Connect to GND.
CR
terminal
15
16
18
19
20
13
10
12
17
RNF1S
RNF2S
＋
－
PWM control
Fig.2 Block diagram & Application circuit diagram
Function
Blank time
Translator
Mix decay
control
OSC
of
4bit DAC
＋
－
＋
－
current
RESET
limit
4/19
Pin No.
Regulator
OVLO
UVLO
OCP
TSD
15
16
17
18
19
20
21
22
23
24
25
26
27
28
22
24
27
26
14
25
9
5
2
3
7
4
1
CW_CCW
Pin name
ENABLE
RNF2S
GND
OUT1A
OUT1B
RNF1
RNF1S
VCC2
OUT2A
OUT2B
RNF2
MODE0
MODE1
PS
VCC1
GND
OUT2A
RNF2S
OUT2B
VCC2
TEST
RNF2
CLK
NC
NC
NC
0.2Ω
0.2Ω
Clock input terminal for advancing the
electrical angle.
Motor rotating direction setting terminal
Terminal for testing
(Used by connecting with GND)
Motor excitation mode setting terminal
Motor excitation mode setting terminal
Output enable terminal
Non connection
Power supply terminal
Non connection
H bridge output terminal
Input
comparator
Connection terminal of resistor for
output current detection
H bridge output terminal
Non connection
Power save terminal
Refer to P.5 for detail.
terminal
100µF
Bypass capacitor.
Setting range is
100uF~470uF(electrolytic)
0.01uF~0.1uF(multilayer ceramic etc.)
Refer to P.6 for detail.
Be sure to short VCC1 & VCC2.
Resistor for current. detecting.
Setting range is
0.1Ω~0.3Ω.
Refer to P.6 for detail.
Resistor for current. detecting.
Setting range is
0.1Ω~0.3Ω.
Refer to P.6 for detail.
Function
Technical Note
of
0.1µF
2010.4 - Rev.A
current
limit