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AIC1899GG Datasheet(PDF) 8 Page - Analog Intergrations Corporation |
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AIC1899GG Datasheet(HTML) 8 Page - Analog Intergrations Corporation |
8 / 10 page AIC1899 8 and larger diode capacitance, which can cause significant switching losses at the 1.0MHz switching frequency of AIC1899. Setting the Output Voltage The AIC1899 operates with an adjustable output from Vin to 24V. Connect a resistive voltage divider from the output to FB (see Fig.1). Calculate 1 R and 2 R using the equation: − = 1 V V R R FB o 2 1 where FB V , the step-up regulator feedback set point, is 1.23V. Connect the resistive-divider as close to the IC as possible. APPLICATION EXAMPLES LX FB GND SS SHDN IN AIC1899 U1 L1 22uH SS0540 D1 33nF C2 R1 11k + 10uF Cout 15V/15mA Vin=3V~4.2V + 33uF Cin 0.1uF Co 1nF CF 1k R2 Fig. 14 1-Cell Li-Ion boost converter for OLED Application |
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