Features: White LED BacklightingAAT3113 - 4 OutputsAAT3114 - 6 Outputs20mAFull Scale Current32 Position Logarithmic Scale with DigitalControlSimple Serial Control? (S2 Cwire™) interfaceLow Noise Constant Frequency Operation33% Less Input Current Than Doubler Charge Pump High Accuracy Brightn...
AAT3114: Features: White LED BacklightingAAT3113 - 4 OutputsAAT3114 - 6 Outputs20mAFull Scale Current32 Position Logarithmic Scale with DigitalControlSimple Serial Control? (S2 Cwire™) interfaceLow Noi...
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White LED Backlighting
AAT3113 - 4 Outputs
AAT3114 - 6 Outputs
20mAFull Scale Current
32 Position Logarithmic Scale with DigitalControl
Simple Serial Control? (S2 Cwire™) interface
Low Noise Constant Frequency Operation
33% Less Input Current Than Doubler Charge Pump
High Accuracy Brightness Matching
Small Application Circuit
Regulated Output Current
Automatic Soft-Start
VIN Range: 2.7V to 5.5V
No Inductors
600kHz Switching Frequency
Iq < 1Ain Shutdow
Temperature Range -40 to 85°C
16-Pin QFN, 12-Pin TSOPJW Package
Symbol | Description | Value | Units |
VIN | Input Voltage | -0.3 to 6 | V |
VOUT |
Charge Pump Output | -0.3 to 6 | V |
VEN/SET | EN/SETto GND Voltage | -0.3 to 6 | V |
VEN/SET(MAX) | Maximum EN/SETto Input Voltage | 0.3 | V |
IOUT | Maximum DC Output Current (Sum of Iout and D currents) | 150 | mA |
JA | Thermal Resistance | 37 | °C/W |
TJ | Operating Junction Temperature Range | -40 to 150 | °C |
The AAT3113/4 are low noise, constant frequency charge pump DC/DC converters that use fractional (1.5X) conversion to increase efficiency in white LED applications. The devices can be used to produce current levels up to 20mA for each output from a 2.7V to 5.5V input. Low external parts counts (two 1F flying capacitors and two small bypass capacitors at VIN and OUT) make the AAT3113/4 ideally suited for small battery-power applications. AnalogicTechSimple Serial Control(S2Cwire) interface is used to enable, disable, and set the LED drive current for a 32-level logarithmic scale LED brightness control. The AAT3113/4 have a thermal management system to protect the device in the event of a short circuit condition on any of the output pins. Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. A low-current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1A. The AAT3113 provides four LED current source outputs, and the AAT3114 provides six. The AAT3113/4 are available in 16-pin quad QFN packages; the AAT3113 is also available in a 12-pin TSOPJW package.