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參數(shù)資料
| 型號(hào)： | BD6231F-E2F8 |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 1 A, PDSO8 |
| 封裝： | ROHS COMPLIANT, SOP-8 |
| 文件頁(yè)數(shù)： | 3/17頁(yè) |
| 文件大?。?/td> | 383K |
| 代理商： | BD6231F-E2F8 |
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Technical Note
11/16
BD6230, BD6231, BD6232, BD6235, BD6236, BD6237
www.rohm.com
2009.08 - Rev.C
○
c
2009 ROHM Co., Ltd. All rights reserved.
i) j) VREF control mode
The built-in VREF-switching on duty conversion circuit provides switching duty corresponding to the voltage of the
VREF pin and the VCC voltage. The function offers the same level of control as the high voltage output setting
function in previous models. The on duty is shown by the following equation.
DUTY ≈ VREF [V] / VCC [V]
For example, if VCC voltage is 24V and VREF pin voltage is 18V, the switching on duty is about 75 percent.
However, please note that the switching on duty might be limited by the range of VREF pin voltage (Refer to the
operating conditions, shown on page 2). The PWM carrier frequency in this mode is 25kHz (nominal), and the
switching operation is the same as it is the PWM control modes. When operating in this mode, do not input the
PWM signal to the FIN and RIN pins. In addition, establish a current path for the recovery current from the motor, by
connecting a bypass capacitor (10F or more is recommended) between VCC and ground.
Fig.42 VREF control operation (timing chart)
2) Cross-conduction protection circuit
In the full bridge output stage, when the upper and lower transistors are turned on at the same time, and this condition
exists during the period of transition from high to low, or low to high, a rush current flows from the power supply to
ground, resulting in a loss. This circuit protects against the rush current by providing a dead time (about 400ns,
nominal) at the transition.
3) Output protection circuits
a) Under voltage lock out (UVLO) circuit
To secure the lowest power supply voltage necessary to operate the controller, and to prevent under voltage
malfunctions, a UVLO circuit has been built into this driver. When the power supply voltage falls to 5.0V (nominal) or
below, the controller forces all driver outputs to high impedance. When the voltage rises to 5.5V (nominal) or above,
the UVLO circuit ends the lockout operation and returns the chip to normal operation.
b) Over voltage protection (OVP) circuit
When the power supply voltage exceeds 45V (nominal), the controller forces all driver outputs to high impedance.
The OVP circuit is released and its operation ends when the voltage drops back to 40V (nominal) or below. This
protection circuit does not work in the stand-by mode. Also, note that this circuit is supplementary, and thus if it is
asserted, the absolute maximum rating will have been exceeded. Therefore, do not continue to use the IC after this
circuit is activated, and do not operate the IC in an environment where activation of the circuit is assumed.
VCC
VREF
FIN
RIN
OUT1
OUT2
0
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| BD6231HFP | 制造商:ROHM 制造商全稱:Rohm 功能描述:H-bridge driver for DC brush motor |
| BD6231HFP-TR | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 H-BRIDGE 36V max 1 Chan 1.0A 1.5ohm RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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| BD62321HFP-TR | 功能描述:IC H-BRIDGE DVR 36V 1CH 3A HRP7 RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動(dòng)器，步進(jìn)電機(jī)驅(qū)動(dòng)器 評(píng)估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
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