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AAT1231 Datasheet(PDF) 2 Page - Advanced Analogic Technologies |
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AAT1231 Datasheet(HTML) 2 Page - Advanced Analogic Technologies |
2 / 27 page Pin Descriptions Pin Configuration TSOPJW-12 (Top View) 1 2 3 4 5 6 12 11 10 9 8 7 PVIN EN/SET SEL VIN N/C SW LIN OVP FB AGND PGND SW Pin # Symbol Function 1 PVIN Input power pin; connected to the source of the P-channel MOSFET. Connect to the input capacitor(s). 2 EN/SET IC enable pin and S2Cwire input control to set output current. 3 SEL FB voltage range select. For the AAT1231, a logic LOW sets the FB voltage range from 0.1V to 0.4V; a logic HIGH sets the FB voltage range from 0.3V to 0.6V. For the AAT1231-1, a logic LOW sets the FB voltage range from 0.4V to 0.1V; a logic HIGH sets the FB voltage range from 0.6V to 0.3V. 4 VIN Input voltage for the converter. Connect directly to the PVIN pin. 5 N/C No connection. 6, 7 SW Boost converter switching node. Connect the power inductor between this pin and LIN. 8 PGND Power ground for the boost converter. 9 AGND Ground pin. 10 FB Feedback pin. Connect a resistor to ground to set the maximum LED current. 11 OVP Feedback pin for over-voltage protection sense. 12 LIN Switched power input. Connect the power inductor between this pin and SW. AAT1231/1231-1 Step-Up DC/DC Converters for White LED Backlight Applications 2 1231.2007.01.1.2 |
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