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BD1754HFN Scheda tecnica(PDF) 8 Page - Rohm |
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BD1754HFN Scheda tecnica(HTML) 8 Page - Rohm |
8 / 19 page 8/16 BD1754HFN Datasheet TSZ02201-0G3G0C200060-1-2 9.NOV.2012 Rev.001 www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 (2) Current Driver The MAX Current is determined by the ISET resistance and the following formula. ILED-max [mA] = 6.4 x 600 [mV] / RISET [kΩ] The LED current state can be changed by the EN control signal. When the state is Cn, the output current (ILED) can be obtained from the following formula (where, n indicates a state number). ILED [mA] = ILED-max x n / 64 The following table is the example of LED current, when ISET resistance is 120 [k Ω]. RISET : 120[kΩ] State Output current [mA] State Output current [mA] State Output current [mA] State Output current [mA] C64 32.0 C48 24.0 C32 16.0 C16 8.0 C63 31.5 C47 23.5 C31 15.5 C15 7.5 C62 31.0 C46 23.0 C30 15.0 C14 7.0 C61 30.5 C45 22.5 C29 14.5 C13 6.5 C60 30.0 C44 22.0 C28 14.0 C12 6.0 C59 29.5 C43 21.5 C27 13.5 C11 5.5 C58 29.0 C42 21.0 C26 13.0 C10 5.0 C57 28.5 C41 20.5 C25 12.5 C9 4.5 C56 28.0 C40 20.0 C24 12.0 C8 4.0 C55 27.5 C39 19.5 C23 11.5 C7 3.5 C54 27.0 C38 19.0 C22 11.0 C6 3.0 C53 26.5 C37 18.5 C21 10.5 C5 2.5 C52 26.0 C36 18.0 C20 10.0 C4 2.0 C51 25.5 C35 17.5 C19 9.5 C3 1.5 C50 25.0 C34 17.0 C18 9.0 C2 1.0 C49 24.5 C33 16.5 C17 8.5 C1 0.5 When the state is C64 (the maximum value), the output current value can be changed on the ISET resistance value as below. State : C64 ISET resistance value (k Ω) Output current per channel (mA) Total output current of the four channels (mA) 240 16.0 64.0 120 32.0 128.0 90 42.7 170.8 60 64.0 256.0 |
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