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零件编号 | BD63710AEFV | ||
描述 | 36V High-performance High-reliability Withstand Voltage Stepping Motor Driver | ||
制造商 | ROHM Semiconductor | ||
LOGO | |||
1 Page
Datasheet
36VHigh-performance,
High-reliability Withstand Voltage
Stepping Motor Driver
BD63710AEFV
●General Description
BD63710AEFV 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 1.0 A.
CLK-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.
● Major Characteristics
■ Range of power supply voltage
19~28 [V]
■ Rated output current (continuous)
■ Rated output current (peak value)
1.0 [A]
1.5 [A]
■ Range of operating temperature
-25~+85 [℃]
■ Output ON resistance (total of
1.2 [Ω] (Typ.)
upper and lower resistors)
●Package
W(Typ.) x D(Typ.)x H(Max.)
HTSSOP-B28
9.70mm x 6.40mm x 1.00mm
● Features
■ Rated output current(DC)1.0A
■ Low ON resistance DMOS output
■ CLK-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
● 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
● Basic application circuit
CLK 15
CW_CCW 16
MODE0 18
MODE1 19
ENABLE 20
VREF 13
CR 10
MTH 12
TEST 17
9 GND
14 PS
7 VCC1
5 OUT1A
2 OUT1B
3 RNF1
4 RNF1S
22 VCC2
24 OUT2A
27 OUT2B
26
RNF2
25 RNF2S
1 GND
Figure.1 BD63710AEFV application circuit diagram
○ Product structure:silicon monolithic integrated circuit
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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○It is not the radiation-proof design for this product.
1/23
TSZ02201-0P2P0B700460-1-2
16.Jun.2015 Rev.002
BD63710AEFV
Datasheet
○Thermal Shutdown (TSD)
This IC has a built-in thermal shutdown circuit for thermal protection. When the IC’s chip temperature rises above
175℃(Typ.), the motor output becomes OPEN. Also, when the temperature returns to under 150℃ (Typ.), it
automatically returns to normal operation. However, even when TSD is in operation, if heat is continued to be added
externally, heat overdrive can lead to destruction.
○Over Current Protection (OCP)
This IC has a built in over current protection circuit as a provision against destruction when the motor outputs are
shorted each other or VCC-motor output or motor output-GND is shorted. This circuit latches the motor output to OPEN
condition when the regulated threshold current flows for 4μs (Typ.). It returns with power reactivation or a reset of the
PS terminal. The over current protection circuit’s only aim is to prevent the destruction of the IC from irregular situations
such as motor output shorts, and is not meant to be used as protection or security for the set. Therefore, sets should
not be designed to take into account this circuit’s functions. After OCP operating, if irregular situations continues and
the return by power reactivation or a reset of the PS terminal is carried out repeatedly, then OCP operates repeatedly
and the IC may generate heat or otherwise deteriorate. When the L value of the wiring is great due to the wiring being
long, after the over current has flowed and the output terminal voltage jumps up and the absolute maximum values
may be exceeded and as a result, there is a possibility of destruction. Also, when current which is over the output
current rating and under the OCP detection current flows, the IC can heat up to over Tjmax=150℃ and can deteriorate,
so current which exceeds the output rating should not be applied.
○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, MTH, VREF) 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.
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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
8/23
TSZ02201-0P2P0B700460-1-2
16.Jun.2015 Rev.002
BD63710AEFV
Datasheet
●Power dissipation
Please confirm that the IC’s chip temperature Tj is not over 150℃, while considering the IC’s power consumption (W),
package power (Pd) and ambient temperature (Ta). When Tj=150℃ is exceeded the functions as a semiconductor do not
operate and problems such as parasitism and leaks occur. Constant use under these circumstances leads to deterioration
and eventually destruction of the IC. Tjmax=150℃ must be strictly obeyed under all circumstances.
Thermal Calculation
The IC’s consumed power can be estimated roughly with the power supply voltage (VCC), circuit current (ICC), output ON
resistance (RONH、RONL) and motor output current value (IOUT).
The calculation method during FULL STEP drive, SLOW DECAY mode is shown here:
Consumed power of the Vcc [W] = VCC [V]・ICC [A] ・・・・・・・①
Consumed power of the output DMOS [W] = (RONH[Ω] + RONL[Ω])・IOUT [A]2・2[ch]・on_duty
During output ON
+ (2・RONL[Ω])・IOUT [A]2・2[ch]・(1 - on_duty) ・・・・・・・②
During current decay
However, on duty: PWM on duty = ton / (tchop)
ton varies depending on the L and R values of the motor coil and the current set value. Please confirm by actual
measurement, or make an approximate calculation.
tchop is the chopping period, which depends on the external CR. See P.9 for details.
IC number
BD63710AEFV
Upper PchDMOS ON Resistance
RONH[Ω] (Typ.)
0.70
Lower NchDMOS ON Resistance
RONL[Ω] (Typ.)
0.50
Consumed power of total IC W_total [W] = ① + ②
Junction temperature Tj = Ta[℃] + θja[℃/W]・W_total [W]
However, the thermal resistance valueθja [℃/W] differs greatly depending on circuit board conditions. Refer to the
derating curve on P.21.Also, we are taking measurements of thermal resistance valueθja of boards actually in use.
Please feel free to contact our salesman. The calculated values above are only theoretical. For actual thermal design,
please perform sufficient thermal evaluation for the application board used, and create the thermal design with enough
margin to not exceed Tjmax=150℃.Although unnecessary with normal use, if the IC is to be used under especially
strict heat conditions, please consider externally attaching a Schottky diode between the motor output terminal and
GND to abate heat from the IC.
○Temperature Monitoring
In respect of BD63710AEFV, there is a way to directly measure the approximate chip temperature by using the TEST terminal
with a protection diode for prevention from electrostatic discharge. However, temperature monitor using this TEST terminal is
only for evaluation and experimenting, and must not be used in actual usage conditions.
(1) Measure the terminal voltage when a current of Idiode=50μA flows from the TEST terminal to the GND, without
supplying VCC to the IC. This measurement is of the Vf voltage inside the diode.
(2) Measure the temperature characteristics of this terminal voltage. (Vf has a linear negative temperature factor against
the temperature.) With the results of these temperature characteristics, chip temperature may be calibrated from the
TEST terminal voltage.
(3) Supply VCC, confirm the TEST terminal voltage while running the motor, and the chip temperature can be
approximated from the results of (2).
VCC
TEST
Internal circuit
Idiode
Vf
-Vf[mV]
Internal circuit
Figure.7 Model diagram for measuring chip temperature
25
150 Chip temperature Tj[℃]
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
16/23
TSZ02201-0P2P0B700460-1-2
16.Jun.2015 Rev.002
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页数 | 27 页 | ||
下载 | [ BD63710AEFV.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
BD63710AEFV | 36V High-performance High-reliability Withstand Voltage Stepping Motor Driver | ROHM Semiconductor |
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