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參數(shù)資料
| 型號(hào)： | M63151FP |
| 廠商： | Renesas Technology Corp. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Polygon Scanner Motor Driver (DMOS Driver) |
| 中文描述： | 多邊形掃描電機(jī)驅(qū)動(dòng)器（DMOS的驅(qū)動(dòng)程序） |
| 文件頁(yè)數(shù)： | 7/14頁(yè) |
| 文件大小： | 355K |
| 代理商： | M63151FP |
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M63151FP
Rev.1.0, Sep.16.2003, page 7 of 13
M63151FP PWM control method
A triangular waveform is output on the CFC pin under the control of the values of the external capacitor connected to
Cfc and the external resistor connected to Rfc. The PWM duty cycle is determined through comparison of this voltage
with the control voltage determined by the current output from CPout and the external filter connected to the CPout and
PREF pins, i.e. the voltage on PREF.
That is, PWM-ON is satisfied when the triangular waveform is at a level below the control voltage and PWM-OFF is
satisfied (regenerative) when the triangular waveform rises above the control voltage. How the relation between the
voltages on Cfc and Pref determines the output voltage is depicted below.
Min.0.85 V less to max.4.00 V or more
(a) When VPREF < 1.25 V,
PWM duty cycle = 0% (always regennerative)
(b) When1.25 V < VPREF < 3.75 V, PWM control
(c) When3.75 V < VPREF, PWM duty cycle =100%
Cfc output waveform rage
Peak = 3.75 V
Trough = 1.25 V
(a) Minimum voltage: 1.25 V 0.25 V
(b) Maximum voltage: 3.75 V 0.25 V
VPREFthrehold voltage (VtPREF)
1.25V 0.25 V
(a) When VPREF< VtVPREF, motor ison
(b) When VPREF< VtVPREF, motor is always off.
PREF threshold voltage
High:PWM - ON
Low:PWM - OFF
PWM - Duty cycle
Cfc output voltage
VPREF (control voltage)
VPREF Operating range
→
→
→
While the motor is rotating, the Cfc output voltage is driven low with the same timing as switching of phase for the
motor in order to improve changes in the rotation speed.
Therefore, the voltage waveform output on Cfc during actual motor operation is as shown in the following figure.
0 V
1.25 V
3.75 V
Phase U
The dashed lines indicate
the timing of phase switching.
The hold line shows the PWM
output voltage wavform.
Phase V
Phase W
Cfc output voltage
VPREF
→
→
→
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相關(guān)代理商/技術(shù)參數(shù) |
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| M63154AFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:3-PHASE BRUSHLESS MOTOR DRIVER |
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| M63160J | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:STEPPING MOTOR DRIVER |
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