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AAT3192 Datasheet(PDF) 2 Page - Advanced Analogic Technologies |
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AAT3192 Datasheet(HTML) 2 Page - Advanced Analogic Technologies |
2 / 18 page AAT3192 2-Channel Charge-Pump LED Driver ChargePumpTM PRODUCT DATASHEET 2 3192.2008.07.1.3 www .analogictech.com AAT3192 2-Channel Charge-Pump LED Driver ChargePumpTM PRODUCT DATASHEET 2 3192.2008.07.1.3 www .analogictech.com Pin Descriptions Pin Symbol Description 1 N/C No connection. 2 OUT Charge pump output. OUT is the output of the charge pump. Bypass OUT to GND 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 GND with a 1μF or larger ceramic capacitor. 6 EN/SET (AAT3192-1/-2/-3) LED enable and serial control input. EN/SET is the ON/OFF control for the LED and the S2Cwire digi- tal input for the AAT3192-1/-2/-3 to control serially the LED brightness according to the maximum current set by RSET. EN/PWM (AAT3192-4) LED ON/OFF and PWM control input. This logic input controls the LED outputs for the AAT3192-4. Alternatively, a PWM signal from a GPIO or an equivalent signal from a separate controller can be used to control LED output current linearly. A PWM signal, ranging from 10% to 100% duty cycle, controls the LED current linearly between ZS and FS. 7 RSET A 1% tolerance resistor from this pin to GND sets the maximum LED current level. For optimal LED output current accuracy and matching in the AAT3192-1/-2/-4, a 14.3kΩ resistor sets each full-scale output current to 20mA, maximum. For the AAT3192-3, a 11.5kΩ resistor is recommended. 8 GND Ground. Connect this pin to the system’s ground plane. 9D2 LED2 Current Sink Input. D2 is the input of LED2 current sink. Connect LED2’s anode to OUT and its cathode to D2. 10 D1 LED1 Current Sink Input. D1 is the input of LED1 current sink. Connect LED1’s anode to OUT and its cathode to D1. Pin Configuration SC70JW-10 (Top View) C- C+ IN D1 GND RSET EN/SET N/C 1 3 4 56 7 8 OUT D2 2 9 10 |
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Similar Description - AAT3192_08 |
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