lt3519emstrpbf Linear Technology Corporation, lt3519emstrpbf Datasheet
lt3519emstrpbf
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lt3519emstrpbf Summary of contents
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... PWM dimming and the CTRL input provides analog dimming. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. V OUT 4.7μ ...
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LT3519 ABSOLUTE MAXIMUM RATINGS (Note 1) , OPENLED (Note 3) .............................................40V V IN SHDN/UVLO (Note 4) ...............................................40V SW, ISP , ISN, ANODE, CATHODE ..............................45V PWM, CTRL ..............................................................10V FB, V ......................................................................3V REF Operating Ambient Temperature Range (Note 2) .................................................. –40°C to ...
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ELECTRICAL CHARACTERISTICS operating temperature range, otherwise specifi cations are at T unless otherwise noted. PARAMETER Switch Leakage Current CTRL for Full-Scale LED Current CTRL Pin Bias Current PWM Input High Voltage PWM Input Low Voltage PWM Pin Resistance to GND ...
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LT3519 TYPICAL PERFORMANCE CHARACTERISTICS V -V Threshold vs V ISP ISN CTRL 300 V = 12V 24V ISP 250 200 150 100 50 0 –50 0.5 1.0 1 (V) CTRL 3519 G01 V V Threshold ...
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TYPICAL PERFORMANCE CHARACTERISTICS FB Regulation Voltage vs Temperature 1. 12V IN 1.24 1.23 1.22 1.21 1.20 –50 – 100 TEMPERATURE (°C) 3519 G10 Switch Saturation Voltage (V ) CESAT 500 450 400 350 300 ...
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LT3519 PIN FUNCTIONS GND (Pins 16): Power Ground and Signal Ground. Tie to GND plane for best thermal performance. OPENLED (Pin 2): Open LED Status Pin. The OPENLED pin asserts if the FB input is greater than ...
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BLOCK DIAGRAM LED ARRAY R SENSE 11 12 ISP ISN + – 4 100mV – + – + 1.2V A1 CTRL + 14 + 1.22V – SHDN/UVLO + 4 2μA – 1.22V G4 ...
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LT3519 OPERATION The LT3519 are constant frequency, current mode regula- tors with an internal power switch and Schottky. Operation can be best understood by referring to the Block Diagram. At the start of each oscillator cycle, the SR latch is ...
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APPLICATIONS INFORMATION determined by the system. The maximum PWM dimming ratio (PWM ) can be calculated from the maximum RATIO PWM period (t ) and the minimum PWM pulse width MAX ( follows: MIN t MAX PWM = ...
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LT3519 APPLICATIONS INFORMATION Programming the Turn-On and Turn-Off Thresholds with the SHDN/UVLO Pin The falling SHDN/UVLO value can be accurately set by the resistor divider. A small 2μA pull-down current is ac- tive when SHDN/UVLO is below the 1.22V threshold. ...
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APPLICATIONS INFORMATION of capacitance value with increasing DC voltage bias may be necessary to choose a higher value capacitor to get the required capacitance at the operation voltage. Always check that the voltage rating of the capacitor is ...
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LT3519 TYPICAL APPLICATIONS 30V 1000:1 PWM Dimming at 120Hz PWM 5V/DIV I LED 0.1A/DIV I L 0.3A/DIV V = 12V 2μs/DIV Boost Automotive LED Driver L1 68μH C1 1μF SW ANODE CATHODE V ...
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TYPICAL APPLICATIONS 24V C1 1μF Waveform for Open LED I LED 0.1A/DIV V OUT 10V/DIV OPENLED 10V/DIV V = 12V 50μs/DIV IN Buck-Boost Mode 150mA LED Driver 16V LED 150mA L1 47μ ANODE IN ...
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LT3519 TYPICAL APPLICATIONS V IN 12V TO 30V C1 (UP TO 40V TRANSIENT) 4.7μF C1: MURATA GRM32ER71H475KA88 C2: TDK C3216X7R1C106M Q1: DIODES FMMT 555 PNP Q2: DIODES FMMT 494 NPN L1: COILTRONICS DR73-470-R M1: VISHAY SILICONIX Si2337DS Waveforms for Open ...
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... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... Full-Featured LED Driver with 1.5A Switch Current LT3518 Full-Featured LED Driver with 2.3A Switch Current LT3591 Constant-Current, 1MHz, High Effi ciency White LED Step-Up Converter with Built-in Schottkys ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...