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{"cards":[{"_id":"26716da2c3ffb547c800003a","treeId":"26716db3c3ffb547c8000038","seq":23037879,"position":1,"parentId":null,"content":"The step-up or step-down type is determined by the relationship between the supply voltage and the LED load voltage. If the supply voltage is lower than the load voltage, use the boost type; If the supply voltage is higher than the load voltage, use the step-down type. The forward voltage of an LED is determined by its forward current. It can be seen from the voltammetric characteristics of LED that the change of forward current will cause the corresponding change of forward voltage. To be exact, the decrease of forward current will also cause the decrease of forward voltage. So when the current is turned down, the forward voltage of the LED is also lowered. This changes the relationship between the supply voltage and the load voltage. For example, in a 24V input LED lamp, eight 1W high-power LEDS are connected in series. At a forward current of 350mA, the forward voltage of each LED is 3.3V.\n\nCommon-Cathode CC <a href=\"http://www.lanpade.com/7-segment-led-dot-matrix/3021aw.html\" style=\"color: #333;\">3021AW</a> 7-Segment digit <a href=\"http://www.xlitx.com/datasheet/3021AW.pdf\" style=\"color: #333;\">3021AW</a> LED Common-Anode CA <a href=\"http://www.lanpade.com/7-segment-led-dot-matrix/3021bw.html\" style=\"color: #333;\">3021BW</a> Display <a href=\"http://www.xlitx.com/datasheet/3021BW.pdf\" style=\"color: #333;\">3021BW</a> 0.30 inch\nCommon-Cathode CC <a href=\"http://www.lanpade.com/7-segment-led-dot-matrix/3022aw.html\" style=\"color: #333;\">3022AW</a> 7-Segment digit <a href=\"http://www.xlitx.com/datasheet/3022AW.pdf\" style=\"color: #333;\">3022AW</a> LED Common-Anode CA <a href=\"http://www.lanpade.com/7-segment-led-dot-matrix/3022bw.html\" style=\"color: #333;\">3022BW</a> Display <a href=\"http://www.xlitx.com/datasheet/3022BW.pdf\" style=\"color: #333;\">3022BW</a> 0.30 inch\n\n<hr style=\"border:1px solid;\">\n\n<a href=\"https://gingkoapp.com/the-light-source-with-ra-100-value.html\" style=\"color: #333;\">The light source with Ra 100 value</a>\n<a href=\"https://gingkoapp.com/the-standby-led-lighting-of-emergency.html\" style=\"color: #333;\">The standby LED lighting of emergency</a>\n<a href=\"https://gingkoapp.com/led-light-source-index-and-average-life.html\" style=\"color: #333;\">LED light source index and average life</a>\n<a href=\"https://gingkoapp.com/led-incandescent-lamp-color-response.html\" style=\"color: #333;\">LED incandescent lamp color response</a>\n<a href=\"https://gingkoapp.com/color-performance-of-led-light-source.html\" style=\"color: #333;\">Color performance of LED light source</a>\n<a href=\"https://gingkoapp.com/color-temperature-led-source-irradiation.html\" style=\"color: #333;\">Color temperature LED source irradiation</a>\n<a href=\"https://gingkoapp.com/change-the-brightness-of-the-led.html\" style=\"color: #333;\">Change the brightness of the LED</a>\n<a href=\"https://gingkoapp.com/led-chips-provide-control-voltage-interface.html\" style=\"color: #333;\">LED chips provide control voltage interface</a>\n<a href=\"https://gingkoapp.com/in-the-rgb-led-system.html\" style=\"color: #333;\">In the RGB LED system</a>\n<a href=\"https://gingkoapp.com/led-supply-voltage-and-load-voltage.html\" style=\"color: #333;\">LED supply voltage and load voltage</a>"}],"tree":{"_id":"26716db3c3ffb547c8000038","name":"LED supply voltage and load voltage","publicUrl":"led-supply-voltage-and-load-voltage"}}