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參數(shù)資料
| 型號(hào)： | LB1876 |
| 廠(chǎng)商： | Sanyo Electric Co.,Ltd. |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Three-Phase Brushless Motor Driver for Polygon Mirror Motors |
| 中文描述： | 三相無(wú)刷電機(jī)的多邊形鏡馬達(dá)驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 13/14頁(yè) |
| 文件大?。?/td> | 118K |
| 代理商： | LB1876 |
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No. 6201-13/14
LB1876
7. Hall sensor input signals
Input signals with amplitudes greater than the input circuit hysteresis (42 mV maximum) must be provided to the Hall
inputs. Input amplitudes of over 100 mV are desirable to minimize the influence of noise. If the output waveform is
disturbed by noise (at phase switching), insert capacitors across the input to prevent this.
8. FG input signal
Normally, one of the Hall sensor signals is input as an FG signal. If noise on the FG input is a problem, insert either a
capacitor or a filter consisting of a capacitor and a resistor. Although it is possible to exclude noise from the FG signal
by inserting a capacitor between the FGFIL pin and ground, if this pin's waveform is smoothed excessively, the circuit
may not be able to operate normally. Therefore, if a capacitor is used here, its value must be held to under 2200 pF. If
the position of the capacitor's ground lead is inappropriate, problems due to noise may become more likely to occur.
Select the position carefully.
9. Constraint protection circuit
This IC includes a built-in constraint protection circuit to protect the IC and the motor during motor constraint. In the
start state, when the LD output is high for a fixed period (the unlocked state), the lower side transistor turns off. The
time is set by the capacitor connected to the CSD pin.
Set time (seconds)
≈
120
×
C (μF)
If a 0.068 μF capacitor is used, the protection time will be about 8 seconds. The set time must have a value that
provides an adequate margin relative to the motor start time. The protection circuit does not operate during braking
implemented by switching the clock frequency. Either switch to the stop state or turn off the power and restart to clear
the constraint protection state.
Since the CSD pin also functions as the initial reset pulse generation pin, if connected to ground the logic circuits will
be reset and speed control operation will not be possible. Therefore, if constraint protection is not used, connect CSD to
ground through a resistor of about 220 k
and a capacitor of about 4700 pF in parallel.
10. Phase lock signal
(1) Phase lock range
Since this IC does not have a counter in the speed control system, the speed error range in the phase locked state
cannot be determined solely by the IC's characteristics. (This is because of the influence of the acceleration of the
changes in the FG frequency.) If it is necessary to stipulate this for the motor, it will be necessary to measure this
with the actual motor. Since it is easier for speed errors to occur in the state where the FG acceleration is large, the
largest speed errors are thought to occur during lock pull-in at startup and when unlocked due to clock frequency
switching.
(2) Phase lock signal mask function
When the LDSEL pin is set high or left open, transient lock signals (short low-level periods on the LD output) is
masked. This function masks short low-level periods due to hunting during pull-in and allows a stable lock signal to
be output. However, the lock signal is delayed by amount of masking time.
When the LDSEL pin is set low, transient unlock signals (short high-level periods on the LD output) is masked.
This function prevents short period high-level signals from being output.
The mask time is set with the capacitor connected between the CLD pin and ground.
Mask time (seconds)
≈
0.9
×
C (μF)
A mask time of about 90 ms can be set by using a capacitor of about 0.1 μF. If complete masking is required, the
mask time must be set large enough to provide ample margin. If masking is not required, leave the CLD pin open.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LB1876(36SOP) | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Controller Miscellaneous - Datasheet Reference |
| LB1876_09 | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:For Polygon Mirror Motors 3-phase Brushless Motor Driver |
| LB1876-MPB-E | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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 |
| LB1876-TLM-E | 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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 |
| LB1877 | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:Brushless Motor Driver with Speed Control for Portable Cassette Recorders |
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