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LT3596EUHG-TRPBF Datasheet(PDF) 1 Page - Linear Technology |
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LT3596EUHG-TRPBF Datasheet(HTML) 1 Page - Linear Technology |
1 / 20 page LT3596 3596f Typical applicaTion FeaTures DescripTion 60V Step-Down LED Driver The LT®3596 is a 60V step-down LED Driver. It achieves 10,000:1 digital PWM dimming at 100Hz with fast NPN current sources driving up to 10 LEDs in each channel. 100:1 LED dimming can also be done with analog control of the CTRL1-3 pin. The step-down switching frequency is programmable between 200kHz and 1MHz and is synchronizable to an external clock. The LT3596 also provides maximum LED brightness while adhering to manufacturers’ specifica- tions for thermal derating. The derate temperature is programmedbyplacinganegativetemperaturecoefficient (NTC) resistor on the master control pin. The LT3596 adaptively controls VOUT in order to achieve optimalefficiency.Otherfeaturesinclude:1.5%LEDcurrent matching between channels, open LED reporting, shorted LED pin protection and reporting, programmable LED cur- rent and programmable temperature protection. 48V 1MHz Step-Down 8W, 100mA LED Driver (Eight White LEDs per Channel) applicaTions n 300mA Buck Regulator, Drives Up to 10 LEDs per Channel with Fast NPN Current Sources n Fast Current Sources for <1µs Pulse Widths (10,000:1 True Color PWM™ Dimming at 100Hz) n LEDs Disconnected in Shutdown n Adaptive VOUT for Increased Efficiency n 6V to 60V Input Voltage Range n ±1.5% Accurate LED Current Matching n External Resistors Set LED Current for Each Channel n Requires No External Compensation n ProgrammableSwitchingFrequency(200kHzto1MHz) n Synchronizable to External Clock n Open, Short LED Detection and Reporting n Programmable LED Thermal Derating and Reporting n Programmable Temperature Protection n 5mm × 8mm Thermally Enhanced QFN Package with 0.6mm High Voltage Pin Spacing n LED Billboards and Signboards n Mono, Multi, Full Color LED Displays n Large Screen Display LED Backlighting n Automotive, Industrial and Medical Displays L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. VIN EN/UVLO LT3596 SYNC SYNC PWM1 PWM2 PWM3 PWM1 PWM2 PWM3 CTRL1 CTRL2 CTRL3 CTRL1 CTRL2 CTRL3 RT FAULT FAULT BIAS 270k 10µF VIN 48V 91k 33.2k VREF TSET CTRLM 10k 90.9k 49.9k 20k 20k 20k 3696 TA01a 100k 100k BIAS BOOST SW DA GND FB LED1 LED2 LED3 ISET1 ISET2 ISET3 VOUT 4.7µF 5V BIAS 4.7µF VOUT 100nF 100k 3.65k 100µH 10,000:1 PWM Dimming at 100Hz PWM 2V/DIV ILED 50mA/DIV 200ns/DIV 3596 TA01b |
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