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NCP2820AFCT2G Datasheet(PDF) 7 Page - ON Semiconductor |
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NCP2820AFCT2G Datasheet(HTML) 7 Page - ON Semiconductor |
7 / 21 page NCP2820 Series http://onsemi.com 7 Figure 2. Test Setup for Graphs OUTM OUTP GND Ri INP INM VP Ri Ci Ci + − + − 4.7 mF + − Audio Input Signal Load 30 kHz Low Pass Filter Measurement Input Power Supply NCP2820 NOTES: 1. Unless otherwise noted, Ci = 100 nF and Ri= 150 kW. Thus, the gain setting is 2 V/V and the cutoff frequency of the input high pass filter is set to 10 Hz. Input capacitors are shorted for CMRR measurements. 2. To closely reproduce a real application case, all measurements are performed using the following loads: RL = 8 W means Load = 15 mH + 8 W + 15 mH RL = 4 W means Load = 15 mH + 4 W + 15 mH Very low DCR 15 mH inductors (50 mW) have been used for the following graphs. Thus, the electrical load measurements are performed on the resistor (8 W or 4 W) in differential mode. 3. For Efficiency measurements, the optional 30 kHz filter is used. An RC low−pass filter is selected with (100 W, 47 nF) on each PWM output. |
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