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參數(shù)資料
| 型號(hào)： | LB8500M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Monolithic Digital IC DC Fan Motor Speed Control IC |
| 中文描述： | 單片數(shù)字集成電路直流風(fēng)扇電機(jī)轉(zhuǎn)速控制IC |
| 文件頁(yè)數(shù)： | 7/15頁(yè) |
| 文件大?。?/td> | 125K |
| 代理商： | LB8500M |
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LB8500M
No.8336-7/15
Pin Setting Procedures (Provided for reference purposes)
1. RC pin
The one-shot multivibrator pulse width can be calculated with the following equation.
TRC(s)
≈
0.85
×
R
×
C..................................................... Equation 1
If the FG signal frequency at full motor speed is fFG (Hz) and the control duty desired for full speed is DUTY (for
example: 50%
→
0.5), the values of the resistor and capacitor connected to the RC pin can be determined from the
following equation.
R × C = DUTY/(3
×
0.85
×
fFG) ..................................... Equation 2
Note that if "rpm" is the full motor speed, since one revolution will be two FG periods, the following equation gives the
FG frequency, fFG (Hz).
fFG(Hz) = 2rpm/60 .........................................................Equation 3
For reference purposes, the following table lists the RC pin external component values determined from equations 2
and 3 when the control duty at full speed will be 80% for a variety of full motor speed values.
Note that the capacitor value must be in the range 0.01μF to 0.015μF due to the RC pin discharge capacity of the IC.
Full motor speed
R
×
C
10000rpm
0.94
×
10
-3
8000rpm
1.18
×
10
-3
6000rpm
1.57
×
10
-3
4000rpm
2.39
×
10
-3
2000rpm
4.68
×
10
-3
The table below lists the RC pin external component values when the control duty for full motor speed is changed for a
full motor speed of 10,000rpm.
Duty at full speed
R
×
C
80% (= 0.8)
0.94
×
10
-3
60% (= 0.6)
0.71
×
10
-3
40% (= 0.4)
0.47
×
10
-3
Also, note that the FG frequency can be determined from the following equation for various control duty input states.
fFG = DUTY/(3
×
0.85
×
RC)..........................................Equation 4
2. C Pin
Since a capacitor that can smooth the pin voltage is connected to the C pin, if the CTL pin input signal frequency is f
(Hz), then the capacitor must meet the following condition. (Here, R is the IC internal resistance of 180k
Ω
(typical).)
1/f = t < RC
Note that the larger the capacitor, the longer the soft start time will be and its response to changes in the input signal will
be slower.
R
C
63k
Ω
78k
Ω
105k
Ω
157k
Ω
312k
Ω
0.015
μ
F
0.015
μ
F
0.015
μ
F
0.015
μ
F
0.015
μ
F
R
C
94k
Ω
71k
Ω
47k
Ω
0.01
μ
F
0.01
μ
F
0.01
μ
F
C pin
VREF circuit
180k
Ω
CTL circuit
CTL pin
CTL pin input inverted
waveform (the frequency is the
same)
A capacitor that can smooth the pin voltage is
connected here.
1/f = t < CR
6VREG
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LB8500MC-AH | 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 |
| LB8502M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Digital IC DC Fan Motor Speed Control IC |
| LB8502MC-AH | 制造商:ON Semiconductor 功能描述:OTHERS - Tape and Reel 制造商:ON Semiconductor 功能描述:Motor / Motion / Ignition Controllers & Drivers OTHERS |
| LB8503V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Monolithic Digital IC DC Fan Motor Speed Control IC |
| LB8503V-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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