BD68720EFV Datasheet, PDF (1/24 Pages) Rohm – High-reliability Withstand Voltage Stepping Motor Driver

Datasheet
36VHigh-performance,
High-reliability Withstand Voltage
Stepping Motor Driver
BD68720EFV
●General Description
BD68720EFV 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 2.0 A.
PARA-IN driving mode is adopted for input interface,
and excitation mode is corresponding to FULL STEP
mode, HALF STEP mode (2 types) and QUARTER
STEP mode via a built-in DAC. 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.
● Key Specifications
■ Range of power supply voltage
19～28 [V]
■ Rated output current (continuous)
2.0 [A]
■ Rated output current (peak value)
2.5 [A]
■ Range of operating temperature
-25～+85 [℃]
■ Output ON resistance (total of
0.65 [Ω] (Typ.)
upper and lower resistors)
●Package
HTSSOP-B28
W(Typ.) x D(Typ.)x H(Max.)
9.70mm x 6.40mm x 1.00mm
● Features
■ Rated output current（DC）2.0A
■ Low ON resistance DMOS output
■ PARA-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
■ Freely timing excitation mode switch
■ Current decay mode switch
（linearly variable FAST/SLOW DECAY ratio）
■ Normal rotation & reverse rotation switching
function
■ Power save function
■ Built-in logic input pull-down resistor
■ Power-on reset function
■ 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)
■ Adjacent pins short protection
■ Microminiature, ultra-thin and high heat-radiation
(exposed metal type) package
● Applications
■ 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
● Typical Application circuit
PHASE1 ¹⁵
PHASE2 17
I01 ¹⁶
I11 18
I02 19
I12 20
VREF 13
CR ₁₀
MTH 12
9 ^GND
14 PS
7 ^VCC1
OUT1A
5
2
OUT1B
3
RNF1
4 _RNF1S
22 ^VCC2
24 ^OUT2A
27 _OUT2B
26
RNF2
25 _RNF2S
GND
1
Figure.1 Application circuit
○ Product structure：silicon monolithic integrated circuit ○It is not the radiation-proof design for this product.
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TSZ22111・14・001
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TSZ02201-0P2P0B701210-1-2
10.Jun.2016 Rev.001