поискавой системы для электроныых деталей |
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BAT54 датащи(PDF) 10 Page - Diodes Incorporated |
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BAT54 датащи(HTML) 10 Page - Diodes Incorporated |
10 / 16 page Peak current definition The peak current rating is a design parameter whose value is dependent upon the overall application. For the high brightness reference designs, a peak current of 190mA was chosen to ensure that the converter could provide the required output power to the LED. In general, the IPK value must be chosen to ensure that the switching transistor, Q1, is in full saturation with maximum output power conditions, assuming worse-case input voltage and transistor gain under all operating temperature extremes. Once IPK is decided the value of RSENSE can be determined by: A selection guide of sense resistor and inductor values for given input voltages, output currents and number of LED connected in series is provided in the table below. SEMICO NDUC TORS ZXSC310 ISSUE 3 - SEPTEMBER 2007 10 R V I SENSE ISENSE PK = Input Voltage (V) LED current (mA) No. of LED’s R SENSE (m ) Inductor ( H) Efficiency (%) 3.3V 10 3 510 68 80 3.3V 10 4 330 68 81 3.3V 10 6 150 68 79 3.3V 20 3 220 68 84 3.3V 20 4 150 68 93 3.3V 20 6 77 68 79 3.3V 30 3 170 68 84 3.3V 30 4 100 68 84 3.3V 30 6 47 68 77 5V 10 3 750 68 83 5V 10 4 510 68 84 5V 10 6 330 68 79 5V 20 3 440 68 85 5V 20 4 250 68 85 5V 20 6 150 68 82 5V 30 3 330 68 86 5V 30 4 170 68 85 5V 30 6 100 68 83 |
Аналогичный номер детали - BAT54 |
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Аналогичное описание - BAT54 |
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