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AIC1647PVTR Datasheet(PDF) 7 Page - Analog Intergrations Corporation |
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AIC1647PVTR Datasheet(HTML) 7 Page - Analog Intergrations Corporation |
7 / 11 page AIC1647 BLOCK DIAGRAM CC RS RC M1 FB VIN GND SW Internal Soft Start PWM/PFM Control 95mV VREF + - Error AMP. SHDN Driver + - Current AMP PWM Control Logic 1.2MHz Oscillator Slope Compensation - + Comparator PIN DESCRIPTIONS PIN 1: SW - Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI. PIN 2: GND - Ground Pin. Tie directly to local ground plane. PIN 3: FB - Feedback Pin. Reference voltage is 95mV. Connect cathode of lowest LED and resistor here. Calculate resistor value according to the formula: RFB = 95mV/ILED PIN 4: SHDN - Shutdown pin. Tie to higher than 1.5V to enable device, 0.3V or less to disable device. PIN 5: VIN - Power input pin. Bypass VIN to GND with a capacitor sitting as close to VIN as possible. 7 |
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