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STPM32 Datasheet(PDF) 80 Page - STMicroelectronics |
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STPM32 Datasheet(HTML) 80 Page - STMicroelectronics |
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80 / 121 page  Application design and calibration STPM32, STPM33, STPM34 80/121 DS10272 Rev 8 Setting CP = 64000 pulses/kWh (at LPWx = 1 - device default value) and according to calculation above the following values are: Table 35. Example 1 calculated data Parameter Value Current sensor sensitivity LED frequency at PN VMAX IMAX IMIN LSBP LSBE kS Vref 2 C P 1R1 R2 + 1800 DClk AV AI calV calI ------------------------------------------------------------------------------------ 3.51mV A == LEDf CP VN IN 3600000 ----------------------------- 20.44Hz == IMIN Vref calI AI 2 15 k S kint --------------------------------------------------------- 5.97 mA = = LSBP Vref 2 1R1 R2 + kint AV AI kS calV calI 2 28 ------------------------------------------------------------------------------------- 0.818mW LSB == LSBE Vref 2 1R1 R2 + 3600 DClk kint AV AI kS calV calI 2 17 -------------------------------------------------------------------------------------------------------------------------- 0.214mWs LSB == |
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