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參數(shù)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(qū)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(shù)： | 16/22頁 |
| 文件大?。?/td> | 427K |
| 代理商： | FAN8621B |
FAN8621B; PRELIMINARY
16
VCM Retract
Power fail condition or when VCM retract command is issued on CNTL3 (pin46) LOW, retract circuit is activated. The retract
current is limited by internal and external resistor connected RRET (pin24) and retract delay time is adjusted by external
capacitor connected CRET (pin 17). The voltage on CRET2 (pin21) charged by spindle back-EMF serves as retract power.
Figure 7. Retract Function Block
Retract delay time and maximum retract current is defined as follows;
Power Management
Supplies Monitoring and Reference
The voltage reference circuit generates precision 1.3V volt reference, other voltage and current reference. Precision low volt-
age monitor circuitry senses 5V, 12V supplies. These supplies are individually divided down by resistor divider and then com-
pared with internal 2.5V reference to determine the set-point low voltage condition. Low voltage condition can be changed by
adding external resistor on SENSE5 (pin4), SENSE12 (42).
Power On Reset (POR)
When low voltage is detected, POR (pin10) is lowered immediately and fed to external controller. The retract and braking
sequence is started. If low voltage condition is removed, the POR becomes high with delay. This time delay is based on charg-
ing of the CDLY (pin11) capacitor with internal current source.
bandgap
reference
37
34
32
17
24
27
20
21
I
cret
12u
R
iret
3k
I
rct=
300 Iret
I
ret
1.3V
2.0V
TSD
por
retract
C17
R24
C21
22
D21
T
retdly
C17
I
cret
-----------
=
I
rct max
)
300 I
ret
300
+
3K
R24
------------------------
=
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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(qū)動器 6CH Motor Drive IC 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 |
| FAN8702B | 功能描述:馬達/運動/點火控制器和驅(qū)動器 DSC 1CH IC 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 |
| 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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