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參數(shù)資料
| 型號： | KA2811C |
| 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(心軸電機和音圈電機驅動器) |
| 中文描述： | VOICE COIL MOTOR CONTROLLER, 2 A, PQFP48 |
| 封裝： | 14 X 14 MM, HEAT SINK, QFP-48 |
| 文件頁數(shù)： | 17/28頁 |
| 文件大小： | 313K |
| 代理商： | KA2811C |
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KA2811C
17
2. VCM CIRCUIT
1. Current Amplifier
Current amplifier is capable of gain adjustment with use of six external resistors.
The design is implemented in a configuration that ensures minimum crossover distortion characteristics.
It externally employs dual power transistors of NPN & PNP types of Imax = 3A current rating in order to minimize IC loss and
maximize output driving capability.
(Dual NPN: SSD1001, Dual PNP: SSD1002)
2. Retract circuit
The power for this circuit is derived from the spindle motor BEMF after having filtered by 3 diodes (self-contained) and the
capacitor C3 at the pin 28(CRET).
Retract function is active when the “Low” level is applied to the input (Pin 25) which turns the pin 40 (SINKB1) to “Low”
state and sets the bias voltage of pin no. 32 (RSENSE) as expressed below:
VCM current during the retraction is determined by the resistor R5.
3. DISABLE Pin
Enables or disables of VCM circuit.
4 GAINSEL
This function selects the gain mode.
When the input to pin 31 (GAINSEL) is at high state, it selects high gain mode, and if low, it becomes low gain mode.
2-1. Gain selection method
Vpin32 V
+
3.75 k
R5 k
]
---------------------------------------------------
3
3.75 k
]
×
×
=
High gain (Pin31 = 5V)
--------------+
R
!
P
+
=
Low gain (Pin32 = 0V)
R1P
R2P
------------------------------
=
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| KA2821D | The KA2821D is a monolithic integrated circuit, and suit able as a two-phase stepping motor driver of a 3.5-inch FDD system |
| KA2822BD | 3-Phase BLDC Motor Driver |
| KA2822BDTF | 3-Phase BLDC Motor Driver |
| KA2822D | 3-Phase BLDC Motor Driver |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| KA2821D | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:The KA2821D is a monolithic integrated circuit, and suit able as a two-phase stepping motor driver of a 3.5-inch FDD system |
| KA2822BD | 功能描述:馬達/運動/點火控制器和驅動器 BLDC Motor Driver 3 Phase 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 |
| KA2822BDTF | 功能描述:馬達/運動/點火控制器和驅動器 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 |
| KA2822CD | 功能描述:馬達/運動/點火控制器和驅動器 BLDC Motor Driver 3 Phase 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 |
| KA2822CDTF | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:3-Phase BLDC Motor Driver |
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