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参数资料
| 型号： | 8904 |
| 厂商： | Allegro MicroSystems, Inc. |
| 英文描述： | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING |
| 中文描述： | 3相无刷直流电动机控制器/驱动器，反电动势遥感 |
| 文件页数： | 15/18页 |
| 文件大小： | 744K |
| 代理商： | 8904 |
8904
3-PHASE BRUSHLESS DC
MOTOR CONTROLLER/DRIVER
www.allegromicro.com
15
Typical application
(A8904SLB)
as opposed to the ESR that dominates the overall impedance of
the input filter, C
filter
. Therefore, it is possible to reduce con-
ducted electromagnetic emissions further, by simply increasing
the value of C
filter.
In extremely sensitive systems, it may be
necessary to introduce a differential mode inductor in series with
the load supply line.
Layout considerations.
The TSSOP part (A8904SLP)
has three separate ground connections, analog, digital, and
power that must be connected together externally. A ground
plane should be used to provide heat sinking for the power
switches and the reduction of potential noise pick-up through
inductive loops and radiated emissions. The ground plane
should cover the area beneath the A8904 and extend beyond the
outline to form a plane around all the external components. The
exposed thermal pad of the TSSOP part should be connected to
the ground plane.
Filter components, especially C
filter
, timing, and delay
capacitors should be positioned as close as possible to the device
terminals. It is also imperative that the traces to the serial port
and oscillator are as short and as wide as possible to reduce stray
inductance and prevent potential data corruption. In addition,
these traces should be positioned well away from any noisy
signals.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 8904010543 | 功能描述:EMI/RFI 抑制器及铁氧体 EMI WASHER, ALUMINUM MESH RoHS:否 制造商:Fair-Rite 产品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流电流: 最大直流电阻: 工作温度范围:- 55 C to + 125 C 封装 / 箱体: 端接类型:SMD/SMT |
| 8904011740 | 制造商:Laird Technologies Inc 功能描述:ELECTROGROUND EMI WASHERS |
| 8904-0175-44 | 制造商:Laird Technologies Inc 功能描述: |
| 8904-0176-44 | 制造商:Laird Technologies Inc 功能描述: |
| 8904-025 | 功能描述:THRM CNDCTV TAPE 600MMX40MX.25MM 制造商:3m 系列:* 零件状态:有效 标准包装:1 |
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