參數(shù)資料
型號: IR2175STR
廠商: International Rectifier
文件頁數(shù): 4/7頁
文件大小: 107K
描述: IC CURRENT SENSE 0.5% 8SOIC
標(biāo)準(zhǔn)包裝: 2,500
功能: 電流感應(yīng)
精確度: ±0.5%
輸入電壓: 9.5 V ~ 20 V
電流 - 輸出: 20mA
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOICN
包裝: 帶卷 (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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