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AAT3114 Dataheets PDF



Part Number AAT3114
Manufacturers AAT
Logo AAT
Description High Efficiency 1.5X Fractional Charge Pumps
Datasheet AAT3114 DatasheetAAT3114 Datasheet (PDF)

High Efficiency 1.5X Fractional Charge Pumps For White LED Applications General Description The AAT3113 and AAT3114/14A 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. A low external parts count (two 1µF flying capacitors and two small bypass capacitors at VIN and OUT) makes these devices ide.

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High Efficiency 1.5X Fractional Charge Pumps For White LED Applications General Description The AAT3113 and AAT3114/14A 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. A low external parts count (two 1µF flying capacitors and two small bypass capacitors at VIN and OUT) makes these devices ideally suited for small, battery-powered applications. AAT3113, AAT3114/14A ChargePump™ Features • • • • • • • • • • • • • • • • • AnalogicTech’s Simple Serial Control™ (S2Cwire™) interface is used to enable, disable, and set the LED drive current for 32-level logarithmic scale LED brightness control. AAT3113 and AAT3114/14A devices have a thermal management system for protection 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. A high switching frequency enables the use of small external capacitors. A low-current shutdown feature disconnects the load from VIN and reduces quieswww.DataSheet4U.com cent current to less than 1µA. The AAT3113 provides four LED current source outputs, and the Applications AAT3114/14A provides six. The AAT3113 is available in a Pb-free 12-pin TSOPJW package, and the • Programmable Current Source AAT3114/14A is available in a Pb-free 16-pin QFN • White LED Backlighting package. AAT3113: Four Outputs AAT3114/14A: Six Outputs 20mA Full-Scale Current Simple Serial Control (S2Cwire) Interface — 32-Position Logarithmic Scale with Digital Control 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 <1µA in Shutdown Temperature Range: -40°C to 85°C 12-Pin TSOPJW Package (AAT3113) 16-Pin QFN Package (AAT3114/14A) Typical Application VIN C1+ C1 1μF OUT VBATTERY CIN 1μF COUT 1μF C1C2+ C2 1μF AAT3114/14A C2D1 D2 D3 D4 D5 D6 EN/SET EN/SET GND D6 D5 D4 D3 D2 D1 3113.2006.07.1.9 1 High Efficiency 1.5X Fractional Charge Pumps For White LED Applications Pin Descriptions Part # AAT3114/14A AAT3113 AAT3113, AAT3114/14A Symbol D2 D3 D4 D5 D6 C1+ C1NC OUT C2+ C2GND NC VIN EN/SET D1 Function Current source output 2. Current source output 3. Current source output 4. Current source output 5 (AAT3114/14A option only). Current source output 6 (AAT3114/14A option only). Flying capacitor 1 positive terminal. Flying capacitor 1 negative terminal. No connect. Charge pump output. Requires 1µF bypass capacitor to ground. Flying capacitor 2 positive terminal. Flying capacitor 2 negative terminal. Ground. No connect. Input power supply. Requires 1µF bypass capacitor to ground. Control pin using S2Cwire serial interface. Current source output 1. Required reference current source. Do not leave pin floating. Exposed paddle (bottom); connect to GND directly beneath package. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 EP 7 6 5 N/A N/A 4 3 N/A 2 1 12 11 N/A 10 9 8 Pin Configuration TSOPJW-12 (Top View) AAT3113 QFN44-16 (Top View) AAT3114/14A EN/SET 15 NC VIN 14 13 D1 16 C2+ OUT C1C1+ D4 D3 1 2 3 4 5 6 12 11 10 9 8 7 C2GND VIN EN/SET D1 D2 D2 D3 D4 D5 1 12 GND C2C2+ OUT 2 11 3 10 4 9 5 6 7 8 C1+ D6 NC C1- 2 3113.2006.07.1.9 High Efficiency 1.5X Fractional Charge Pumps For White LED Applications Part Number Descriptions Part Number AAT3113ITP AAT3114ISN AAT3114AISN AAT3113, AAT3114/14A VIN Range 3.0V ≤ VIN ≤ 5.5V 3.2V ≤ VIN ≤ 5.5V Number of LED Outputs, 20mA Full-Scale 4 6 LED Present Detect Current 2µA 2µA 150µA Package TSOPJW-12 QFN44-16 Absolute Maximum Ratings TA = 25°C, unless otherwise noted. Symbol VIN VOUT VEN/SET VEN/SET(MAX) IOUT θJA TJ Description Input Voltage Charge Pump Output EN/SET to GND Voltage Maximum EN/SET to Input Voltage Maximum DC Output Current (sum of IOUT and D currents) Thermal Resistance Operating Junction Temperature Range Value -0.3 to 6 -0.3 to 6 -0.3 to 6 0.3 150 37 -40 to 150 Units V V V V mA °C/W °C 3113.2006.07.1.9 3 High Efficiency 1.5X Fractional Charge Pumps For White LED Applications Electrical Characteristics VIN = 3.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C. Symbol Description Conditions Min Typ Max Units 2.7 Active, No Load Current EN = 0 AAT3113: 3.0V ≤ VIN ≤ 5.5V TA = 25°C, All AAT3114/14A: 3.2V ≤ VIN ≤ 5.5V Outputs Max Current 3.0V ≤ VIN ≤ 5.5V VD1:Dn = 3.6V, VIN = 3.3V VIN = 3.5V, IOUT(total) = 40mA 1 18 -2 0.3 93 400 600 20 5.5 2 1 22 2 V mA µA mA %/V % % µs kHz V V µs ns 500 1 µs µA AAT3113, AAT3114/14A Input Power Supply VIN Operation Range ICC Operating Current ISHDN Shutdown Current IDX ΔID/ΔVIN Output Current Output Current Line Regulation Current Matching I(D-Match) Between Any Two O.


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