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BD1206GUL Datasheet(PDF) 6 Page - Rohm |
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BD1206GUL Datasheet(HTML) 6 Page - Rohm |
6 / 13 page Technical Note 6/12 BD1206GUL www.rohm.com 2010.02 - Rev.A © 2010 ROHM Co., Ltd. All rights reserved. (Notes) TaccMIN < Tpulse < TaccMAX Please input a pulse on this condition TLO n 0 0 TOFF TLAT THI EN LED Current Setting 1 2 n (N≦16) Tacc n-1 Tpulse TOFF EN 1 0 0 LED Current Setting TaccMAX EN 16pulse 15pulse 14pulse TLAT Tacc TLAT TLAT 13pulse TLAT 0.125mA 0.25mA 0.5mA 1mA LED Current OFF ● Separate Function Description (1) LED driver a) Register access control protocol LED current is controlled by only EN terminal. It is possible to access the register inside of this chip by using the protocol below. Accessing the registers with using this protocol operates LED driver ON/OFF and selecting the mode. Moreover, MAX current can be outputted without Clock input to EN terminal by holding H zone of fixed time after EN terminal starting. < When setting current level > < When starting by MAX setup > Fig.5 Register access protocol Fig.6 Slope control example (Note) ・ In the case of N > 16, BD1206GUL selects the mode of N = 16. ・ LED current is changed by the pulse of EN pin. Be careful to noise of EN signal. ・ Reset BD1206GUL when the set is unusual. (Keep EN=L over Toff time.) |
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