LT3466EDD Linear Technology, LT3466EDD Datasheet
LT3466EDD
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LT3466EDD Summary of contents
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... LEDs are disconnected and internal soft-start. The LT3466 is available in the 10-pin (3mm × 3mm × 0.75mm) DFN and 16-pin thermally enhanced TSSOP packages. , LTC and LT are registered trademarks of Linear Technology Corporation. 1µF L2 47µH SW2 ...
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... Maximum Junction Temperature ......................... 125°C Storage Temperature Range DFN .................................................. –65°C to 125°C TSSOP .............................................. –65°C to 150°C Lead Temperature (Soldering, 10 sec, TSSOP) ..... 300° ORDER PART NUMBER GND NC LT3466EDD V OUT1 SW1 V IN SW2 V DD PART MARKING OUT2 GND LBBH 16-LEAD PLASTIC TSSOP = 125° ...
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ELECTRICAL CHARACTERISTICS range, otherwise specifications are at T PARAMETER Converter 1 Current Limit Converter 2 Current Limit Converter 1 V CESAT Converter 2 V CESAT Switch 1 Leakage Current Switch 2 Leakage Current CTRL1 Voltage for Full LED Current CTRL2 ...
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LT3466 W U TYPICAL PERFOR A CE CHARACTERISTICS CTRL 250 25°C A 200 150 100 0.5 1 1.5 2 CONTROL VOLTAGE (V) 3466 G03 Switch Saturation Voltage ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS R vs Oscillator Frequency T 1000 100 10 200 600 1000 OSCILLATOR FREQUENCY (kHz) Oscillator Frequency vs Temperature 2500 V = 3.6V IN 2250 R T 2000 1750 1500 1250 R T 1000 ...
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LT3466 CTIO S (DD/TSSOP) V (Pin 1/Pin 3): Output of Converter 1. This pin is OUT1 connected to the cathode of the internal Schottky diode. Connect an output capacitor from this pin to ground. SW1 ...
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W BLOCK DIAGRA LT3466 3466fa 7 ...
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LT3466 U OPERATIO Main Control Loop The LT3466 uses a constant frequency, current mode control scheme to provide excellent line and load regula- tion. It incorporates two identical, but fully independent PWM converters. Operation can be best understood by referring ...
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U OPERATIO However, the other converter will continue functioning properly. The photo in Figure 4b shows circuit operation with converter 1 output open-circuit and converter 2 driv- ing eight LEDs at 20mA. Converter 1 starts switching at a lower peak ...
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LT3466 U U APPLICATIO S I FOR ATIO DUTY CYCLE The duty cycle for a step-up converter is given by – V OUT – V OUT D CESAT where: V ...
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U U APPLICATIO S I FOR ATIO INDUCTOR SELECTION The choice of the inductor will depend on the selection of the switching frequency of the LT3466. The switching frequency can be programmed from 200kHz to 2MHz. Higher switching frequency allows ...
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LT3466 U U APPLICATIO S I FOR ATIO Table 3. Inrush Peak Current V (V) L (µ OUT 0.22 Typically peak ...
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U U APPLICATIO S I FOR ATIO Figure 9 shows four LEDs being powered off two AA cells. The battery is connected to the inductors and the chip is powered off 3.3V logic supply voltage CELLS 1.8V to ...
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LT3466 U TYPICAL APPLICATIO S Li-Ion to 2/4 White LEDs 1µ 15µH 15µH SW1 V SW2 OUT1 OUT2 C OUT1 1µF LT3466 FB1 FB2 R R CTRL1 CTRL2 FB1 T ...
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U TYPICAL APPLICATIO S Li-Ion to 6/6 White LEDs 1µ 33µH 33µH SW1 V SW2 OUT1 OUT2 C OUT1 1µF LT3466 FB1 FB2 R CTRL1 CTRL2 T R FB1 OFF ...
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LT3466 U TYPICAL APPLICATIO S Li-Ion to 8/8 White LEDs 1µ 47µH 47µH SW1 V SW2 OUT1 OUT2 C OUT1 2.2µF LT3466 FB1 FB2 R CTRL1 CTRL2 T OFF ON ...
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U TYPICAL APPLICATIO S Li-Ion to 10/10 White LEDs 1µ 68µH 68µH SW1 V SW2 OUT1 OUT2 C OUT1 1µF LT3466 FB1 FB2 R CTRL1 CTRL2 T OFF ON OFF ...
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LT3466 U TYPICAL APPLICATIO S 2 Li-Ion Cells to 10/10 White LEDs 1µ 47µH 47µH SW1 V SW2 OUT1 OUT2 C OUT1 0.47µF LT3466 FB1 FB2 R CTRL1 CTRL2 T ...
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... DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 10-Lead Plastic DFN (3mm × ...
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... Low Noise, 1.5MHz, Regulated Charge Pump White LED Driver LTC3205/LTC3206 High Efficiency, Multidisplay LED Controller LT3465/LT3465A Constant Current, 1.2MHz/2.7MHz, High Efficiency White LED Boost Regulator with Integrated Schottky Diode ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...