AAT3120ITP-T1 Advanced Analogic Technologies, Inc., AAT3120ITP-T1 Datasheet
AAT3120ITP-T1
Available stocks
Related parts for AAT3120ITP-T1
AAT3120ITP-T1 Summary of contents
Page 1
General Description The AAT3120 is a low noise, constant frequency charge pump DC/DC converter that uses fractional (1.5X) conversion to improve efficiency for white LED applications. The device can be used to pro- duce eight current levels up to 20mA ...
Page 2
Pin Descriptions Pin # Symbol Function 1 C2+ Flying capacitor 2 positive terminal. Connect a 1µF capacitor between C2+ and C2-. 2 OUT Charge pump output. Requires 1µF capacitor connected between this pin and ground. 3 C1- Flying capacitor 1 ...
Page 3
Absolute Maximum Ratings T = 25°C, unless otherwise noted. A Symbol Description V Input Voltage IN V Charge Pump Output OUT EN/SET to GND Voltage EN/SET V Maximum EN/SET to Input Voltage EN/SET(MAX Maximum DC ...
Page 4
Electrical Characteristics 1.0µ OUT 3.5V. IN Symbol Description Input Power Supply V Operation Range IN I Operating Current CC I Shutdown Current SHDN I Output Current ...
Page 5
Typical Characteristics Turn-On to Full-Scale Load Switch ENSET (2V/div) CP (2V/div) V DIODE (2V/div (200mA/div) Time (100µs/div) Turn-Off from Full-Scale Charge Pump ENSET (2V/div) V DIODE (2V/div (100mA/div) Time (400µs/div) I vs. Input Voltage DIODE (3x8.3mA) ...
Page 6
Typical Characteristics Efficiency vs. Input Voltage (3x20mA 3. 3. 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 Input Voltage ...
Page 7
Functional Block Diagram Single-Wire EN/SET Interface Functional Description The AAT3120 is a dual mode load switch (1X) and high efficiency (1.5X) fractional charge pump device intended for white LED backlight applica- tions. The fractional charge pump consists of a low ...
Page 8
Code I , Each LED (mA) OUT Table 1: Current Level Settings. Constant Current Output Level Settings The constant current source output amplitude for output set via the ...
Page 9
Applications Information LED Selection The AAT3120 is specifically intended for driving white LEDs. However, the device design will allow the AAT3120 to drive most types of LEDs with for- ward voltage specifications ranging from 2.0V to 4.3V. LED applications may ...
Page 10
The expression to define the ideal efficiency (η) can be rewritten as: × η = OUT OUT OUT = = × OUT -or- ⎛ ⎞ V η(%) = 100 OUT ⎝ ⎠ ...
Page 11
ESR is an important characteristic to consider when selecting a capacitor. ESR is a resistance internal to a capacitor, which is caused by the leads, inter- nal connections, size or area, material composition, and ambient temperature. Capacitor ESR is typi- ...
Page 12
Additional Application Circuits V BATTERY AAT3120 Driving a Display Module with Three Paralleled White LEDs. V BATTERY Enable Red Enable Green Enable Blue AAT3120 Driving Common-Anode RGB Color LED. 12 VIN C1+ VOUT C1- C2 OUT AAT3120 ...
Page 13
... Sample stock is generally held on part numbers listed in BOLD. 3120.2005.11.1.1 Marking 1 Part Number (Tape and Reel) NGXYY + 0.10 0.20 - 0.05 7° NOM 4° ± 4° 0.055 ± 0.045 0.010 AAT3120 3-Channel Charge Pump For White LED Applications 2 AAT3120ITP-T1 0.04 REF 0.45 ± 0.15 2.75 ± 0.25 13 ...
Page 14
... Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. ...