Document
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
BD63843EFV, BD63847EFV
Technical Note
●Absolute maximum ratings (Ta=25°C)
Item
Symbol
BD63847EFV
BD63843EFV
Supply voltage Power dissipation
VCC1,2 Pd
-0.3~+36.0 1.45※1 4.70※2
Input voltage for control pin
VIN
-0.3~+7.0
RNF voltage
Output current Output current (peak)※4
VRNF IOUT IOUTPEAK
2.0※3 2.5※3
0.7
1.0※3 1.5※3
Operating temperature range Topr
-25~+85
Storage temperature range
Tstg
-55~+150
Junction temperature
Tjmax
+150
※1 70mm×70mm×1.6mm glass epoxy board. Derating in done at 11.6mW/°C for operating above Ta=25°C.
※2 4-layer recommended board. Derating in done at 37.6mW/°C for operating above Ta=25°C.
※3 Do not, however exceed Pd, ASO and Tjmax=150°C.
※4 Pulse width tw≦1ms, duty20%.
Unit V W W V V
A/phase A/phase
°C °C °C
●Operating conditions (Ta= -25~+85°C)
Item Symbol
Supply voltage Input voltage for control pin
VCC1,2 VIN
Output current
※5 Do not, however exceed Pd, ASO.
IOUT
BD63847EFV 1.7※5
19~28 0~5.5
BD63843EFV 0.7※5
Unit V V
A/
●Electrical characteristics (Unless otherwise specified Ta=25°C, VCC1,2=24V) Limit
Item Symbol Min. Typ. Max.
Whole
Circuit current at standby Circuit current
ICCST ICC
-
1.0 2.5 2.5 5.0
Control input (CLK, CW_CCW, MODE0, MODE1, ENABLE, PS)
H level input voltage L level input voltage
VINH
2.0
-
-
VINL
-
- 0.8
H level input current
IINH 35
50 100
L level input current
IINL
Output (OUT1A, OUT1B, OUT2A, OUT2B)
-10
0
-
Output ON resistance (BD63847EFV) RON
-
0.85 1.10
Output ON resistance (BD63843EFV)
Output leak current Current control
RNFXS input current RNFX input current VREF input current VREF input voltage range MTH input current MTH input voltage range Minimum on time (Blank time) Comparator threshold 1 Comparator threshold 2 Comparator threshold 3
RON
ILEAK
IRNFS IRNF IVREF VREF IMTH VMTH tONMIN VCTH1 VCTH2 VCTH3
-
-
-2.0 -40 -2.0 0 -2.0 0 0.3 0.570 0.403 0.196
1.90
-
-0.1 -20 -0.1
-0.1
0.8 0.600 0.424 0.230
2.47
10
3.0 3.5 1.5 0.630 0.445 0.264
Unit Condition
mA PS=L mA PS=H, VREF=3V
V V µA VIN=5V µA VIN=0V
Ω
IOUT=1.5A, Sum of upper and lower
Ω
IOUT=0.5A, Sum of upper and lower
µA
µA RNFXS=0V µA RNFX=0V µA VREF=0V V µA MTH=0V V µs C=1000pF, R=39kΩ V VREF=3V, 100% V VREF=3V, 70.71% V VREF=3V, 38.27%
www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved.
2/8
2012.02 - Rev.A
BD63843EFV, BD63847EFV
Technical Note
●Terminal function and Application circuit diagram
Pin No. Pin name
Function
Pin No.
1
GND
Ground terminal
15
2 OUT1B H bridge output terminal
16
3
RNF1
Connection terminal of resistor for output current detection
17
4
RNF1S
Input terminal of current limit comparator
18
5 OUT1A H bridge output terminal
19
6 NC Non connection
20
7
VCC1
Power.