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BD1754HFN 데이터시트(PDF) 7 Page - Rohm |
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BD1754HFN 데이터시트(HTML) 7 Page - Rohm |
7 / 21 page 7/17 BD1754HFN Datasheet TSZ02201-0G3G0C200060-1-2 10.Dec.2015 Rev.002 www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 Application Information 1. Description of Operations (1) UPIC (= Uni-Port Interface Control) interface BD1754HFN has a single-line digital control interface (UPIC) that can control the power ON/OFF and LED current value through the EN pin. The LED current decreases by one step depending on the number of rising edges. When the minimum output current is reached (64 rising edges), the next rising edge changes the output current to the maximum value at startup time. To maintain any output current, the EN pin must be kept at ‘H’ level. To power OFF, the EN pin must be kept at ‘L’ level for more than 1msec. MAX Current MAX Current EN ILED (Internal) State C64 C63 C62 C61 C62 C60 C2 C1 C64 C63 tHI tLO tOFF OFF OFF MIN Current OFF OFF Figure 10. Brightness Control Method EN tHI tLO tOFF Figure 11. UPIC Interface By the following sequence, UPIC can control the current driver for MAX current and OFF state only. Figure 12. UPIC Interface Usage for MAX current or OFF Only MAX Current MAX Current EN ILED (Internal) State C64 C64 tOFF OFF OFF OFF tOFF OFF OFF OFF |
유사한 부품 번호 - BD1754HFN_15 |
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