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參數資料
| 型號： | FAN8621B |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | 12V Spindle Motor and Voice Coil Motor Driver IC(12V電源的主軸電機和語音線圈電機驅動器) |
| 中文描述： | VOICE COIL MOTOR CONTROLLER, PQFP52 |
| 封裝： | 14 X 14 MM, HEAT SINK, QFP-48 |
| 文件頁數： | 14/22頁 |
| 文件大小： | 427K |
| 代理商： | FAN8621B |
FAN8621B; PRELIMINARY
14
Figure 4. Brake Function Block
Voice Coil Motor Driver
VCM Current Set Point
VCM current set point is defined by two PWM signals. External capacitor connected CFVCM (pin15) is charged and/or dis-
charged depending on status of PWM signals. The voltage, level shifted by 4V, is filtered by an internal 2-nd order filter and
converted into DC voltage, FILOUT (pin19) ranging from VCMREF4V+2V to VCMREF4V-2V. The cutoff frequency of the
2nd order filter is about 100KHz, so the PWM frequency must be grater than 100KHz. For more resolution of VCM current set
point, the value of two internal current sources for PWMH and PWML is not equal. The weight is 64, so it is good that fre-
quency of PWMH is different that of PWML. When PWM signal is LOW, CFVCM (pin15) voltage increases This voltage is
limited by internal 4V reference and resistor, R
FVCM.
Figure 5. Current Set Point with PWMs
Sense Amplifier
Current sense amplifier amplifies the differential voltage across the sense resistor which is in series with VCM coil. This
amplified voltage is level shifted by VCMREF4V. The amplifier gain is set to 2 or 8 depending on GAINSEL. The output of
the current sense amplifier is available at SENSEOUT( pin25).
18
37
34
33
40
41
brake
V
W
32
PVCC
VDD
2.8M
C41
C40
M40b
M40a
R33
VDD
VDD
VCMREF4V
i
pwml
i
pwmh
i
pwml
i
pwmh
Rfvcm
=4K
80pF
80pF
20K
20K
PWMH
PWML
C15
19
15
14
13
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| FAN8623 | 12V Spindle Motor and Voice Coil Motor Driver(12V電源的主軸電機和語音線圈電機驅動器) |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN8623 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Servo/Spindle Motor Controller/Driver |
| FAN8700 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Camera Motor Drive and Control IC |
| FAN8702 | 功能描述:馬達/運動/點火控制器和驅動器 6CH Motor Drive IC RoHS:否 制造商:STMicroelectronics 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| FAN8702B | 功能描述:馬達/運動/點火控制器和驅動器 DSC 1CH IC RoHS:否 制造商:STMicroelectronics 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| FAN8702MP | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:6 Channel DSC Motor Driver |
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