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ST1208 Folha de dados(PDF) 9 Page - Sitronix Technology Co., Ltd. |
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ST1208 Folha de dados(HTML) 9 Page - Sitronix Technology Co., Ltd. |
9 / 12 page ST1208 V1.1 9/12 2004/10/27 LED CURRENT vs. SUPPLY VOLTAGE 12 13 14 15 16 17 18 19 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 SUPPLY VOLTAGE ( V ) LED1 LED2 LED3 EFFICIENCY ( PLEDs / PBATT ) vs. Li + BATTERY DISCHARGE 40 50 60 70 80 90 4.2 4.1 4.0 3.9 3.8 3.7 3.6 3.5 3.4 Li+ BATTERY VOLTAGE, TIME-WEIGHTED ( V ) 45mA 60mA 90mA 100mA ! Typical Operating Characteristics Condition: VIN = VEN1 = VEN2 = 3.6 V, CIN = C1 = C2 = COUT = 1 uf, dropout current is 60 mA. ( 20 mA / LED X 3 ), LED forward voltage Vf = 3.3 V, ISET = 125 uA Under-Voltage Protection 0 10 20 30 40 50 60 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 VIN ( V ) IIN ( mA ) Increase Reduce ILED vs. ISET 0 10 20 30 40 50 10 30 60 90 12 0 15 0 18 0 21 0 24 0 ISET ( uA ) VIN = 2.7 V VIN = 3.0 V VIN = 3.3 V VIN = 3.6 V VIN = 4.2 V VIN = 5.0 V ILED = 30 mA @ Iset = 190 VIN = 2.7 V VIN = 3.0 V VIN > 3.3 V |
Nº de peça semelhante - ST1208 |
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Descrição semelhante - ST1208 |
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