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| 型号： | SI8503-B-GM |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 12/36页 |
| 文件大小： | 0K |
| 描述： | SENSOR CURR 20A 5.5V UNI 12QFN |
| 标准包装： | 74 |
| 电流 - 感应： | 20A |
| 精确度： | ±5% |
| 灵敏度： | 98mV/A |
| 电流 - 电源： | 4mA |
| 传感器类型： | 闭环 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出： | 可配置 |
| 频率： | 50kHz ~ 1MHz |
| 电极标记： | 单向 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 12-VFQFN |
| 包装： | 管件 |
| 其它名称： | 336-1415-5 |
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Si85xx
1.0%
0.5%
0.0%
-0.5%
-1.0%
-1.5%
-2.0%
-2.5%
-3.0%
-3.5%
Current Sense
Transformer
Si8502
0
25
50
75
100
125
Temperature (Celcius)
Figure 6. Differential Temperature
Calibration Error
on-chip sense resistance over the temperature range of
–40 to +125 °C. Series inductance is constant at 2 nH
(max) across this same temperature range.
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
Figure 8. Leading-Edge Noise Suppression
Waveforms (200 kHz, 9.3 A Load)
2.7. FAULT Output
The FAULT output (Si8517/8/9) guards against Si85xx
output signal errors caused by missing reset cycles.
FAULT is asserted when a measurement cycle exceeds
the internal watchdog timer times limit of t WD . FAULT
can be used to alert a local microcontroller or digital
power controller of a current sense failure or to initiate a
system shutdown. To detect faults, tie a 200 k ? resistor
from TRST/FAULT to VDD.
-20
0
20
40 60
Temperature (°C)
80
100
120
2.8. Safe Operating Limits
Figure 7. Series Resistance Thermal
Characteristics
2.6. Leading Edge Noise Suppression
High-amplitude spikes on the leading edge of the
primary switching waveforms can cause the PWM latch
to be erroneously reset at the start of the switching cycle
when operating in current mode control. To prevent this
problem, leading edge blanking is commonly used to
disable the current comparator during the early portion
of the primary-side switching cycle. The Si85xx
eliminates leading-edge noise spikes by including them
in the signal integration. As shown in the output
waveform of Figure 8 (Si8502 waveform measured
directly on OUT pin with no external filter), noise present
in the input waveform is eliminated without the use of
blanking.
The Si85xx is a very robust current sensor. Its maximum
input current rate of change is limited to 1000 A/μs. The
maximum peak ac input current limit is 200 A. The
thermal limit or continuous dc current flow limit is 30 A.
Exceeding these limits may cause long-term reliability
issues. Refer to “AN329: Extending the Full-Scale
Range of the Si85xx” for more information.
12
Preliminary Rev. 0.4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| Si8503-C-GM | 功能描述:板上安装电流传感器 20A Current Sensor Single Output RoHS:否 制造商:Honeywell 电流额定值:+/- 56 A 传感器/变换器类型: 电源电压:4.75 VDC to 5.25 VDC 响应时间:< 0.2 us 输出电压: 工作温度:- 40 C to + 85 C 准确性:+/- 0.24 % 频率范围: |
| SI8503-C-GMR | 制造商:Silicon Laboratories Inc 功能描述:20A CURRENT SENSOR, SINGLE OUTPUT - Tape and Reel |
| Si8503-C-IM | 功能描述:板上安装电流传感器 20A SNGLE OUTPUT 1kV RoHS:否 制造商:Honeywell 电流额定值:+/- 56 A 传感器/变换器类型: 电源电压:4.75 VDC to 5.25 VDC 响应时间:< 0.2 us 输出电压: 工作温度:- 40 C to + 85 C 准确性:+/- 0.24 % 频率范围: |
| SI8503-C-IMR | 制造商:Silicon Laboratories Inc 功能描述:20A CURRENT SENSOR, SINGLE OUTPUT 1KV QFN12 - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:SENSOR CURR 20A 5.5V UNI 12QFN 制造商:Silicon Laboratories Inc 功能描述:20A Current Sensor Single Output 1kV |
| Si8503-C-IS | 功能描述:板上安装电流传感器 20A SNGLE OUTPUT 5kV RoHS:否 制造商:Honeywell 电流额定值:+/- 56 A 传感器/变换器类型: 电源电压:4.75 VDC to 5.25 VDC 响应时间:< 0.2 us 输出电压: 工作温度:- 40 C to + 85 C 准确性:+/- 0.24 % 频率范围: |
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