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SM8131B00B датащи(PDF) 8 Page - Nippon Precision Circuits Inc |
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SM8131B00B датащи(HTML) 8 Page - Nippon Precision Circuits Inc |
8 / 21 page SM8131B NIPPON PRECISION CIRCUITS INC.—8 EN input signal and LED drive current setting (disable interval) The LED drive current setting due to EN input is set by the 4-bit counter (16 steps). On the 17th pulse, the counter DATA = 1 and the current is reset to the maximum current value. When the counter DATA = 16, ILED = 0mA and the LED drive circuit shuts down. When both EN1 and EN2 are held LOW for an extended interval, the internal enable signal “CE” goes LOW and the device enters power-save mode. In this mode, the EN input internal counter is reset and subsequent ris- ing-edge pulses on EN restart the counter from DATA = 1. SEL inputs and LED control groups The DIN1 to DIN6 6-channel LED drive pins can be divided into two groups of drive pins (EN1 control and EN2 control drive pins) by the state of select inputs SEL1 and SEL2. Two groups with separate LED drive cur- rent control using EN1 and EN2 allows a single device to independently adjust the backlight brightness of 2 screens. With a MODE 6:0 setting, EN2 is not used and should be connected to GND. Also, any unused DIN LED drive pins should be connected to GND. LED drive current setting disable interval Table. SEL setting and LED drive pin grouping SEL input LED control signal MODE SEL1 SEL2 DIN1 DIN2 DIN3 DIN4 DIN5 DIN6 6:0 setting L L EN1 EN1 EN1 EN1 EN1 EN1 5:1 setting L H EN1 EN1 EN1 EN1 EN1 EN2 4:2 setting H L EN1 EN1 EN1 EN1 EN2 EN2 3:3 setting H H EN1 EN1 EN1 EN2 EN2 EN2 EN1 input 11 12 13 14 15 16 17 18 19 20 21 ILED disable signal LED current ILED off 11 12 13 14 15 16 1 2 3 4 5 |
Аналогичный номер детали - SM8131B00B |
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Аналогичное описание - SM8131B00B |
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