亚博棋牌游戏Allegro MicroSystems-ACS710常见问题 - yaboAPP亚博,yabo亚博网站,亚博电竞官网客户端

ACS710电流传感器系列具有以下优点：

User-adjustable OC fault level
High speed OC fault response (<2 µs)
Wide bandwidth of 120 kHz
Low noise, hence better current resolution
Wide-body package provides greater creepage and clearance distances for line-powered applications
Higher isolation voltage allows higher working voltage

When mounted on the Allegro ASEK710 evaluation board (or any application board thermally similar to the ASEK710 evaluation board) the ACS710 package allows a maximum continuous current of 25 A at a maximum ambient temperature of 125°C. This sets the "optimized accuracy range," IPOA, for continuous input current. The "linear sensing range" is three times IPOA, and is appropriate for applications that monitor the inrush current or transient overcurrent, which are higher than the continuous current under normal operation. The ACS710 can linearly sense transient currents with amplitudes up to three times IPOA. (See also the FAQ "What does the characterization data look like at the sensor IC full linear sensing range, IR?") This feature is used in applications such as motor control, and power conversion and management.

是。只需将Fault_en引脚连接到/故障输出引脚（如图1所示），以实现自动故障复位。该配置使电路用作当前比较器。（有关输入和输出信号波形的图2中的示波器图。）建议使用电容器，COC，以避免/故障引脚处的任何可能的故障。它应该是适当的值，通常大于1nf，取决于噪声环境和所需的故障响应时间。

Figure 1. Connection at A made to enable automatic reset of overcurrent fault.

图2。输入（IP-）和输出（故障）信号波形

of ACS710 configuration shown in figure 1 with COC = 100 nF.

是。The ACS710 family uses Hall-effect technology, which is capable of sensing electrical currents having both DC and AC components. As the datasheet states, the bandwidth of the ACS710 is 120 kHz typical. There may be phase lag and amplitude attenuation of the output for AC currents with frequency content greater than 120 kHz. For transient current signals, the response time is ≈ 4 µs.

This feature is particularly valuable when using the ACS710 with an analog-to-digital converter. A-to-D converters typically derive their LSB from a reference voltage input. If the reference voltage varies, the LSB will vary proportionally. The ratiometric feature of the ACS710 means its gain and offsets are proportional to its supply voltage, VCC. If the reference voltage and the supply voltage for the ACS710 are derived from the same source, the ACS710 and the A-to-D converter will both track those variations, and such variations will not be a source of error in the analog-to-digital conversion of the ACS710 output. Figure 3 is a plot of primary current, IP, vs output voltage, VOUT, of the ACS710-25C when varying VCC. The offset and sensitivity levels shift proportionally with VCC. For example, when VCC = 5.5 V, the 0 A output is 5.5 ⁄ 2 = 2.75 V nominal, and the sensitivity is 30.8 mV/A nominal.

Figure 3. ACS710-25C output voltage versus primary sensed current, at various supply voltage levels.

Allegro recommends the use of a 0.1 µF bypass capacitor between the VCC pin and the GND pin. The capacitor should be located as close as practicable to the ACS710 package body. Use of other external components depends on the application; please refer to Typical Application section of thedatasheet.

No, the ACS710 sensitivity and 0-ampere quiescent voltage level are programmed by Allegro.

ACS710的传感器IC系列的当前分辨率受到器件输出信号的噪声底部的限制。例如，ACS710-12C版本可以在完全带宽下在25°C下解决约163 mA的电流级别的变化。ACS710-25C版本可以解析大约213 mA。在这些水平，耦合到线性霍尔效应IC的磁场的量恰好在其噪声地板之上。通过过滤需要较低带宽的应用的ACS710的输出，可以显着提高分辨率。亚博尊贵会员通过滤波可实现的各种带宽的噪声水平和设备输出电流分辨率在ACS710-12C的表1中给出，以及ACS710-25C的表2中给出。通过由内部电阻RF（int）（典型值1.7kΩ）和外部滤波电容器CF组成的简单，一阶RC滤波器完成过滤。

Table 1. ACS710-12C Noise Level and Current Resolution versus Filtering Capacitance and Resulting Bandwidth
CF (nF)	BW （千赫）	Vrms.Noise (µV)	VP-PNoise (µV)	Current Resolution (mA)
0	120	1523.	9138	163
1	94	1185	7110	127
2.2	43	1010	6060	108
4.7	20	874	5244	94
10	9	768	4608	82
22	4	724	4344	78
47	2	682.	4092	73

表2. ACS710-25C噪声水平和当前分辨率与过滤电容和带宽
CF (nF)	BW （千赫）	Vrms.Noise (µV)	VP-PNoise (µV)	Current Resolution (mA)
0	120	994	5964	213.
1	94	948	5688	203.
2.2	43	713	4278	153
4.7	20	658.	3948	141
10	9	602	3612.	129
22	4	570.	3420	122
47	2	536.	3216	115

Typical values for measured inductance versus test signal frequency are:

3.1 nh 10 kHz
2.8 nH at 100 kHz
2.5 nH at 200 kHz

The capacitance between the ACS710 current carrying conductor and sensor ground is about 2 pF.

不，ACS710家族是领先（PB）免费。所有引脚均配有100％哑光锡，包装内部没有铅。

Yes, download from:ACS710 Gerber文件（邮编）。

Yes, a layout drawing .PDF file can be downloaded from: ACS710 Layout Drawing (PDF).

ACS710应用中的间隙距离通常等于传感器封装的相对侧上的焊盘之间的距离。基于数据表中推荐的焊盘布局，它衡量：

9.50 - 2×（2.25 / 2）= 7.25（mm）。

The creepage distance on the surface of the sensor IC package measures approximately: 7.50 + 2.00 = 9.50 (mm)

The creepage distance on the surface of the printed circuit board on which the sensor IC is mounted may be increased, if necessary, by cutting a slit on the board between the solder pads on opposite sides of the sensor IC package. Refer to figure 4.

Figure 4. Typical slit cut into the PCB underneath the package,

分离两家别针，进一步控制爬电。

假设：

A. The current carrying conductor is on the same plane as the Hall element, and

B.导体具有无限的长度

The result based on above assumptions will be the worst case result in terms of the influence of the stray field generated by the current carrying conductor on the Hall element.

The magnetic field generated in the direction perpendicular to the plane in which the conductor and the Hall element lie, at the distance l to the conductor will be:

β=μ×I /（2π×L）（Tesla）

Where:

µ = µ0 = 4π × 10-7(H/m) = 400π(nH/m), assuming no core material around,

I is in amperes, the current flowing in the conductor, and

L is in meters, the distance between the point under consideration and the conductor.

The analysis is based on the fact that the magnetic coupling coefficient of ACS710 family is typically 9.5 gauss per ampere (0.95 mT/A).

The graph in figure 5 shows absolute current error caused by a current carrying conductor which lies in the same plane as the Hall element, at various distances. The percentage error relative to full range and be calculated as:

err =（绝对当前错误/ IP）×100（％）

图5.各种电流值的绝对电流误差与分离距离。

The ACS710 family has been certified by UL to the following standard:

UL1577 (Pending UL certificate)

The mold compound is UL recognized to UL94V-0

ACS710输出在VCC慢速增速期间的行为是什么？

The typical output behavior of the ACS710-12C during a slow ramp-up of VCC is shown for 0 A in figure 6 and for 12.5 A in figure 7.

Figure 6. VCC ramp-up with IP = 0 A.

图7. VCC RAMP-UP = 12.5 A.

The typical time to valid output is given in table 3 and in figure 8 (IP = 0 A, VCC = 5 V) and figure 9 (IP = 12.5 A, VCC = 5 V). However, we recommend a 3X to 5X safety margin to account for power-on time variation over process and temperature ranges.

Table 3. ACS710-12C Input Current versus Power-On Time

I_P
(A)

t_人事军官
(µs)

0

14

12.5

16

图8. ACS710-12C的启动，0 A应用，然后VCC步骤从0到5 V.

Figure 9. Startup of ACS710-12C with 12.5 A applied, then a VCC step from 0 to 5 V.

The ACS710-25C VIOUT response time from deep saturation was measured at less than 9 µs. Please see the oscilloscope plot in figure 10 for details.

图10。试验条件：对于饱和，VCC=5 V，TA=25°C，

IP = 180 A; for linear VIOUT, Ip = 40 A.

图11中的图表显示了ACS710电流传感器IC电路的高电平频率响应模拟的结果。顶部的曲线是幅度响应，底部的曲线是阶段响应。

Figure 11. Frequency response of the ACS710.

传感器的输出可以振荡。

ACS710可能无法产生有效的输出，因为输出驱动器将无法提供足够的电流。

下面的过电流限制结果的基础on the Allegro ASEK710 evaluation board. The limits may be different on a different application board. For detailed information on the Allegro ASEK710 evaluation board, please see FAQ Can I get the Gerber files for your evaluation board?.

表4显示了连续直流电流的结果，表5显示了脉冲电流的结果。图12显示了各种输入电流水平对模具温度的影响。

表4。连续电流过流限制 ASEK710 evaluation board, at various ambient temperatures
t_A （°C）	I_P(OClim) (A)
25	45
85	35
125	25

Table 5. Pulsed Current Overcurrent Limits ASEK710 evaluation board, at room temperature
I_P (A)	Duration (女士)	Duty Cycle (%)	数量 Pulses Allowed
100	3000	NA.	单身
150	300	NA.	单身
200.	20	NA.	单身
200.	10	10	200.
200.	10	1	Unlimited

Figure 12. ACS710 die temperature (°C) versus continuous DC IP current (A)

请参阅图13中的图表，用于来自一组ACS710-12C设备的分发数据，其特征在于（13A）灵敏度，（13B）非线性，（13C）对称性，（13D）总误差。

Figure 13A. ACS710-12C Sensitivity versus Ambient Temperature at IP = 37.5 A

Figure 13B. ACS710-12C Nonlinearity versus Ambient Temperature at IP = 37.5 A

Figure 13C. ACS710-12C Symmetry versus Ambient Temperature at IP = 37.5 A

图13D。ACS710-12C总误差与IP = 37.5 A的环境温度

图14中的图表显示了在一系列操作环境温度范围内的OC故障电平误差的分布。数据从有限数量的设备中获取，并且仅供参考。

Figure 14. ACS710-25C Overcurrent Fault Error versus Ambient Temperature

通过将高频正弦频率注入高电流引线来进行引线框架噪声测试。然后测量到霍尔效应装置的输出上的信号耦合。ACS710家庭器件具有高水平的引线框架噪声抑制，因为表6显示。此外，图15表示性能作为频率的函数。

Table 6. Typical Capacitive Coupling of 20 V_p-p在感测电流路径上的信号
Frequency （MHz）	V_OUT （MV._p-p)	噪音拒绝 (dB)
5	5	−72
10	16	−62
15	40	−54
20	58	−51

ACS710 Current Sensor IC Frequently-Asked Questions

Figure 1. Connection at A made to enable automatic reset of overcurrent fault.

图2。输入（IP-）和输出（故障）信号波形

of ACS710 configuration shown in figure 1 with COC = 100 nF.

Figure 3. ACS710-25C output voltage versus primary sensed current, at various supply voltage levels.

Figure 4. Typical slit cut into the PCB underneath the package,

分离两家别针，进一步控制爬电。

图5.各种电流值的绝对电流误差与分离距离。

Figure 6. VCC ramp-up with IP = 0 A.

图7. VCC RAMP-UP = 12.5 A.

Table 3. ACS710-12C Input Current versus Power-On Time

I_P
(A)

t_人事军官
(µs)

0

14

12.5

16

图8. ACS710-12C的启动，0 A应用，然后VCC步骤从0到5 V.

Figure 9. Startup of ACS710-12C with 12.5 A applied, then a VCC step from 0 to 5 V.

图10。试验条件：对于饱和，VCC=5 V，TA=25°C，

IP = 180 A; for linear VIOUT, Ip = 40 A.

Figure 11. Frequency response of the ACS710.

Figure 12. ACS710 die temperature (°C) versus continuous DC IP current (A)

Figure 13A. ACS710-12C Sensitivity versus Ambient Temperature at IP = 37.5 A

Figure 13B. ACS710-12C Nonlinearity versus Ambient Temperature at IP = 37.5 A

Figure 13C. ACS710-12C Symmetry versus Ambient Temperature at IP = 37.5 A

图13D。ACS710-12C总误差与IP = 37.5 A的环境温度

Figure 14. ACS710-25C Overcurrent Fault Error versus Ambient Temperature

Figure 15. ACS710 noise rejection versus noise frequency

Table 3. ACS710-12C Input Current versus Power-On Time
I_P (A)	t_人事军官 (µs)
0	14
12.5	16

ACS710 Current Sensor IC Frequently-Asked Questions

What are the advantages of ACS710 sensor family?

What are the "optimized accuracy range," IPOA, and the "linear sensing range," IR?

In normal operation the /FAULT output signal is latched low when an overcurrent condition occurs, and it resets only when the FAULT_EN pin receives a negative pulse or VCC is reset. Is it possible to make the Fault reset automatic?

Figure 1. Connection at A made to enable automatic reset of overcurrent fault.

图2。输入（IP-）和输出（故障）信号波形

of ACS710 configuration shown in figure 1 with COC = 100 nF.

ACS710系列是否可以感知直流和交流电流？

What does "ratiometric" mean?

Figure 3. ACS710-25C output voltage versus primary sensed current, at various supply voltage levels.

What external components are required?

是否有任何方法可以调整ACS710的增益？

How small of a current can the ACS710 resolve?

What is the ESD tolerance of the ACS710?

ACS710电流承载导体和传感器IC接地的电容是多少？

ACS710是否包含铅（PB）？

我可以获得评估板的Gerber文件吗？

I can't use Gerber files; is any other layout data available?

What are the creepage and clearance distances between the current path and the sensing circuit?

Figure 4. Typical slit cut into the PCB underneath the package,

分离两家别针，进一步控制爬电。

ACS710对杂散磁场的敏感性如何？

图5.各种电流值的绝对电流误差与分离距离。

ACS710有哪些安全认证？

ACS710输出在VCC慢速增速期间的行为是什么？

Figure 6. VCC ramp-up with IP = 0 A.

图7. VCC RAMP-UP = 12.5 A.

How soon after the application of power will a valid signal be available from the ACS710?

Table 3. ACS710-12C Input Current versus Power-On Time IP(A) t人事军官(µs) 0 14 12.5 16

图8. ACS710-12C的启动，0 A应用，然后VCC步骤从0到5 V.

Figure 9. Startup of ACS710-12C with 12.5 A applied, then a VCC step from 0 to 5 V.

VIOUT从深度饱和的响应时间是多少？

图10。试验条件：对于饱和，VCC=5 V，TA=25°C，

IP = 180 A; for linear VIOUT, Ip = 40 A.

的频率响应是什么ACS710咕咕叫呢ent sensor IC?

Figure 11. Frequency response of the ACS710.

What happens if I try to drive more than the specified 10 nF maximum capacitance with the output of the sensor IC?

如果我尝试使用传感器IC的输出驱动小于指定的4.7kΩ最小电阻，会发生什么？

What is the overcurrent tolerance of the ACS710 devices?

Figure 12. ACS710 die temperature (°C) versus continuous DC IP current (A)

What does the characterization data look like at the sensor IC full linear sensing range, IR?

Figure 13A. ACS710-12C Sensitivity versus Ambient Temperature at IP = 37.5 A

Figure 13B. ACS710-12C Nonlinearity versus Ambient Temperature at IP = 37.5 A

Figure 13C. ACS710-12C Symmetry versus Ambient Temperature at IP = 37.5 A

图13D。ACS710-12C总误差与IP = 37.5 A的环境温度

What is the overcurrent fault level error?

Figure 14. ACS710-25C Overcurrent Fault Error versus Ambient Temperature

How will capacitive coupling between the current path in the ACS710 and the Hall element affect the sensor IC output?

Figure 15. ACS710 noise rejection versus noise frequency

Table 3. ACS710-12C Input Current versus Power-On Time

I_P
(A)

t_人事军官
(µs)

0

14

12.5

16