参数资料
型号: IR2175STR
厂商: International Rectifier
文件页数: 4/7页
文件大小: 107K
描述: IC CURRENT SENSE 0.5% 8SOIC
标准包装: 2,500
功能: 电流感应
精确度: ±0.5%
输入电压: 9.5 V ~ 20 V
电流 - 输出: 20mA
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOICN
包装: 带卷 (TR)
4
IR2175(S) & (PbF)
www.irf.com
Application Hint:
Temperature drift of the output carrier frequency can be cancelled by measuring both a PWM period and the on-time
of PWM (Duty) at the same time. Since both periods vary in the same direction, computing the ratio between these
values at each PWM period gives consistent measurement of the current feedback over the temperature drift.
Vin+= -260mV
Vs = 0V
Vin+= +260mV
Vs = 0V
Duty=91%
Duty=9%
Carrier Frequency =
130kHz
PO
PO
Timing Waveforms
Figure 1 Output waveform
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