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AAT3103IJQ-2-T1 Datasheet(PDF) 2 Page - Advanced Analog Technology, Inc. |
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AAT3103IJQ-2-T1 Datasheet(HTML) 2 Page - Advanced Analog Technology, Inc. |
2 / 17 page AAT3103 3-Channel Charge-Pump LED Driver ChargePumpTM PRODUCT DATASHEET 2 3103.2008.03.1.0 www .analogictech.com AAT3103 3-Channel Charge-Pump LED Driver ChargePumpTM PRODUCT DATASHEET 2 3103.2008.03.1.0 www .analogictech.com Pin Descriptions Pin # Symbol Description 1 D1 LED1 Current Source Output. Connect LED1’s anode to D1 and its cathode to AGND. 2 OUT Charge Pump Output. Bypass OUT to AGND with a 1μF or larger ceramic capacitor. 3 C- Charge Pump Capacitor Negative Node. 4 C+ Charge Pump Capacitor Positive Node. Connect a 1μF ceramic capacitor between C+ and C-. 5IN Power source input. Connect IN to the power source, typically the battery. Bypass IN to AGND with a 1μF or larger ceramic capacitor. 6 EN/SET (AAT3103-1/-2) LED Enable and serial control input. EN/SET is the ON/OFF control for the LED and the S2Cwire digital input for the AAT3103-1/-2 to control the LED brightness up to the maximum current set by RSET. EN/PWM (AAT3103-4) LED ON/OFF and PWM (Pulse Width Modulation) control input. This logic input controls the LED outputs for the AAT3103-4. A PWM signal, ranging from 10% to 100% duty cycle, controls the LED current linearly between minimum and the full-scale output set by RSET. 7 RSET A 1% tolerance resistor from this pin to AGND sets the maximum LED current value. For optimal LED output current accuracy and matching in the AAT3103-1/-2/-4, a 14.3kΩ resistor sets each full-scale output current to 20mA. 8 AGND Analog Ground. Connect this pin to the system’s analog ground plane. 9 D3 LED3 Current Source Output. Connect LED3’s anode to D3 and its cathode to AGND. 10 D2 LED2 Current Source Output. Connect LED2’s anode to D2 and its cathode to AGND. Pin Configuration SC70JW-10 (Top View) 56 OUT C- C+ D2 D3 AGND RSET IN EN/SET (EN/PWM) D1 1 2 3 47 8 9 10 |
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