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AN2208 bảng dữ liệu(PDF) 34 Page - STMicroelectronics

tên linh kiện AN2208
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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AN2208 bảng dữ liệu(HTML) 34 Page - STMicroelectronics

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7 Test results
AN2208
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Figure 37 and Figure 38 illustrate thermal behavior by showing the waveform of ITOT current to
HSD during the short circuit with different ambient temperature. The input is switched at 1 Hz.
The thermal shutdown is active and the output channel is switched off because it is shorted.
The maximum case temperature with maximum current ITOT is 42°C during normal operation
(without short circuit) as shown in Figure 39.
Note:
The temperature measured in thermal chamber using the FLUKE 189 multimeter and thermo-
coupler. No airflow present during the test.
Figure 37. Waveform ITOT and VINOPT during
the test with short circuit VCC = 28V,
TA = 85°C, Wave4 = ITOT,
Wave1 = VINOPT
Figure 38. Waveform on ITOT and VINOPT during
the test with short circuit VCC = 28V,
TA = –25°C, Wave4 = ITOT,
Wave1 = VINOPT
Figure 39. Case temperature dependency vs. current ITOT (TA = 25°C and VCC = 24 V)



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