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參數(shù)資料
| 型號(hào)： | NJM3773D2 |
| 廠商： | New Japan Radio Co., Ltd. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | DUAL STEPPER MOTOR DRIVER |
| 中文描述： | 雙步進(jìn)電機(jī)驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 3/9頁(yè) |
| 文件大?。?/td> | 170K |
| 代理商： | NJM3773D2 |
NJM3773
Figure 3. Output stage with current paths
during turn-on, turn-off and phase shift.
I
FUNCTIONAL DESCRIPTION
Each channel of the NJM3773 consists of the following sections: an output H-bridge with four transistors and four
recirculation diodes, capable of driving up to 750 mA continuous current to the motor winding, a logic section that
controls the output transistors, an S-R flip-flop, and a comparator. The clock-oscillator is common to both channels.
Constant current control is achieved by switching the output current to the windings. This is done by sensing the
peak current through the winding via a current-sensing resistor R
, effectively connected in series with the motor
winding. As the current increases, a voltage develops across the sensing resistor, which is fed back to the com-
parator. At the predetermined level, defined by the voltage at the reference input V
, the comparator resets the flip-
flop, which turns off the upper output transistor. The turn-off function of the two channels works independently of
each other. The current decreases until the clock oscillator triggers the flip-flops of both channels simultaneously,
which turns on the output transistors again, and the cycle is repeated.
To prevent erroneous switching due to switching transients at turn-on, the
NJM3773 includes a digital filter. The clock oscillator provides a blanking pulse which is used for digital filtering of
the voltage transient across the current sensing resistor during turn-on.
The current paths during constant current switching and phase shift are shown in figure 3.
Fast Current Decay
Slow Current Decay
Motor Current
Time
1 2
3
3
2
1
R
S
V
MM
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NJM3773E3 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Dual Stepper Motor Driver 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 |
| NJM3773E3-TE2 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Dual Stepper Motor Driver 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 |
| NJM3773FM2 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Dual Stepper 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 |
| NJM3773FM2-TE3 | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 Dual Stepper Motor Driver 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 |
| NJM3774 | 制造商:NJRC 制造商全稱:New Japan Radio 功能描述:DUAL STEPPER MOTOR DRIVER |
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