AAT1407 Advanced Analogic Technologies, Inc., AAT1407 Datasheet
AAT1407
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AAT1407 Summary of contents
Page 1
... SwitchReg 6 Channel LED Backlight Driver with Integrated Boost and High Frequency Direct PWM Dimming General Description The AAT1407 is a highly integrated, high efficiency LED backlight solution for notebook computers, monitors and portable TVs. The device operates from DC inputs, ciga- rette lighter adapters, or multi-cell Li-ion batteries over the 4 ...
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... SYNC COMP RSET C3 R2 FSET R1 PGND WLED Backlight LX R3 OVP AAT1407 R4 CS1 CS2 CS3 CS4 CS5 CS6 GND SGND PRODUCT DATASHEET AAT1407 V : 45V at 180mA OUT C4 2.2μF 50V 0805 1407.2010.06.1.0 ...
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... Pin Configuration 1407.2010.06.1.0 TQFN34-24 (Top View SYNC FSET GND 2 18 GND OVP GND COMP 4 16 PWM RSET 5 15 CS1 GND 6 14 CS2 GND PRODUCT DATASHEET AAT1407 3 ...
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... Only one Absolute Maximum Rating should be applied at any one time. 2. Based on long-term current density limitation. 3. Mounted on an FR4 board. 4. Derate 20mW/°C above 25° 3 PRODUCT DATASHEET AAT1407 Value Units -0.3 to 7.0 -0 0.3 CC ...
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... J(HYS The AAT1407 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla- tion with statistical process controls. 2. Output voltage must result in a voltage lower than the LX maximum rating under all operating conditions. ...
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... OUT = 45V OUT 100 0 4.7 4.65 4.6 4.55 4.5 4.45 4.4 4.35 4 PRODUCT DATASHEET AAT1407 Boost Efficiency vs. Load Current (L = 10μ 4.7V; PWM = GND SET 28V IN OUT V = 12V OUT V = 24V OUT 70 95 ...
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... FSET = GND 1.12 FSET = Current Sink Matching vs. Temperature 1.6 1.4 1.2 1 0.8 0.6 0 PRODUCT DATASHEET AAT1407 Shutdown Current vs. Input Voltage ( Open) LX CSX Input Voltage ( 12V) IN -40 - Temperature (° 12V ...
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... I OUT (50mA/div (1A/div) Time (100μs/div 2.2μF; (AC coupled) (50mV/div) (AC coupled) (200mV/div) (1A/div) = 2.2μ PRODUCT DATASHEET AAT1407 Switching Waveforms (V = 12V 37V 2.2μF; OUT IN OUT L = 4.7μ 120mA) OUT OUT I LX Time (500ns/div) 1407 ...
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... PWM SYNC FSET Functional Description The AAT1407 is a highly integrated, high efficiency white LED backlight solution for notebook computers, monitors and portable TVs. The device operates from regulated DC inputs, cigarette lighter adapters, and multi-cell Li-ion batteries over a voltage range from 4.5V to 26V. ...
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... Figure 1: PWM Input Frequency vs. Dimming Range. 10 Fault Tolerant Operation The AAT1407 device is protected from faults arising from LED opens and/or shorts. An LED open condition will be detected by the controller at startup and during normal operation. The low voltage on the current sink is detected by the controller, which disables the feedback to the boost converter from that current sink ...
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... Channel LED Backlight Driver with Integrated Boost and High Frequency Direct PWM Dimming Application Information OVP Protection with Open LED Failure The AAT1407's OVP protection consists of a resistive divider network (R3 and R4) as shown in Figure 2. The resistor divider must be selected so that the voltage at ...
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... The rectifier reversed current increases dramatically at elevated temperatures PRODUCT DATASHEET AAT1407 ) and package thermal resis should be considered for high pulsed FSM ...
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... IN(MIN) Compensation Component Selection · The AAT1407 Boost architecture uses peak current mode control to eliminate the double pole effect of the output L&C filter and simplifies the compensation loop design. The current mode control architecture simplifies the transfer function of the control loop one-pole, one left plane zero and one right half plane (RHP) system in frequency domain ...
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... P_COM 2π · R · Z_COM 2π · R · VIN Figure 3: AAT1407 Equivalent Output Stage. 14 Where the compensation capacitor the compensation resistor the output resistance of the error amplifier EA OUT (2.97MΩ). A 15nF (C3) capacitor and a 5kΩ (R1) resistor in series are chosen for optimum phase margin and fast transient response ...
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... C1 Taiyo Yuden, GMK325BJ106KN-T, 10μF, 35V, X5R,1210; OR Murata GRM32ER71H106K, 10μF, 50V, X7R, 1210 C2 2.2μF, 10V, 0603 C3 Cap, 15nF, 10V, 0603 C4 Murata, GRM31CR71H225KA88L, 2.2μF, 50V, X7R, 1206 R1, R2, R3, R4 Carbon Film resistors, 1%, 0603 Figure 4: AAT1407IMK Evaluation Board Schematic. Figure 5: AAT1407IMK Evaluation Board Top Side Layout. 1407.2010.06.1 4.7μ ...
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... Marking Part Number (Tape and Reel) 1 K2XYY TQFN34-24 3 1.700 ± 0.050 R(5x) Detail “A” Bottom View 0.203 REF PRODUCT DATASHEET AAT1407 2 AAT1407IMK-T1 0.210 ± 0.040 0.400 BSC Detail “A” 1407.2010.06.1.0 ...