LT3596 60V Step-Down LED Driver Fae Tseru Dpircse Tnoi n 300mA Buck Regulator, Drives Up to 10 LEDs per The LT 3596 is a 60V step-down LED Driver. It achieves Channel with Fast NPN Current Sources 10,000:1 digital PWM dimming at 100Hz with fast NPN n Fast Current Sources for <1s Pulse Widths current sources driving up to 10 LEDs in each channel. (10,000:1 True Color PWM Dimming at 100Hz) 100:1 LED dimming can also be done with analog control n LEDs Disconnected in Shutdown of the CTRL1-3 pin. n Adaptive V for Increased Efficiency OUT The step-down switching frequency is programmable n 6V to 60V Input Voltage Range between 200kHz and 1MHz and is synchronizable to an n 1.5% Accurate LED Current Matching external clock. The LT3596 also provides maximum LED n External Resistors Set LED Current for Each Channel brightness while adhering to manufacturers specifica- n Requires No External Compensation tions for thermal derating. The derate temperature is n Programmable Switching Frequency (200kHz to 1MHz) programmed by placing a negative temperature coefficient n Synchronizable to External Clock (NTC) resistor on the master control pin. n Open, Short LED Detection and Reporting n The LT3596 adaptively controls V in order to achieve Programmable LED Thermal Derating and Reporting OUT n optimal efficiency. Other features include: 1.5% LED current Programmable Temperature Protection n matching between channels, open LED reporting, shorted 5mm 8mm Thermally Enhanced QFN Package with LED pin protection and reporting, programmable LED cur- 0.6mm High Voltage Pin Spacing rent and programmable temperature protection. a acilpp Tsnoi 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. n LED Billboards and Signboards n Mono, Multi, Full Color LED Displays n Large Screen Display LED Backlighting n Automotive, Industrial and Medical Displays T lacipy a acilpp Tn oi 48V 1MHz Step-Down 8W, 100mA LED Driver (Eight White LEDs per Channel) V 5V IN V BIAS IN BIAS 48V 10F 4.7F 270k EN/UVLO BOOST 100H 100nF 91k SW V OUT 10,000:1 PWM Dimming at 100Hz LT3596 4.7F 100k SYNC SYNC DA RT GND 3.65k 33.2k FB z 28V PWM PER LED 2V/DIV PWM1 PWM1 V OUT STRING PWM2 PWM2 PWM3 PWM3 CTRL1 CTRL1 I LED CTRL2 CTRL2 50mA/DIV CTRL3 CTRL3 BIAS LED1 100k LED2 LED3 FAULT FAULT 3596 TA01b V REF 200ns/DIV 3696 TA01a 90.9k 10k I SET1 TSET I SET2 CTRLM I SET3 49.9k 100k 20k 20k 20k 3596fa LT3596 a ulosb T e Mixa Mu M r a Tsgni p ni c no Farugi Tnoi (Note 1) TOP VIEW Input Voltage (V ), EN/UVLO ..................................60V IN BOOST .....................................................................80V BOOST Pin Above SW Pin ....................................... 25V 51 50 48 46 44 43 NC LED1-3, V ............................................................42V OUT FB 2 BIAS, FAULT .............................................................25V 41 NC V , RT, I , TSET, CTRLM .................................3V REF SET1-3 EN/UVLO 4 FB, CTRL1-3, PWM1-3, SYNC ....................................6V 39 NC Operating Temperature Range TSET 6 (Notes 2, 3) ............................................ 40C to 125C V 7 37 BIAS REF Maximum Junction Temperature .......................... 125C 53 GND 9 35 NC Storage Temperature Range .................. 65C to 150C GND 34 NC NC 11 33 CTRL1 NC 12 32 CTRL2 CTRLM 13 31 CTRL3 I 14 30 PWM1 SET1 I 15 29 PWM2 SET2 I 16 28 PWM3 SET3 27 RT 17 SYNC 18 19 20 21 22 23 24 25 26 UHG PACKAGE VARIATION: UHG52 (39) 52-LEAD (5mm s 8mm) PLASTIC QFN T = 125C, = 32C/W JMAX JA EXPOSED PAD (PIN 53) IS GND, MUST BE SOLDERED TO PCB o r D re i n Fro Ma Tnoi LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3596EUHG PBF LT3596EUHG TRPBF 3596 52-Lead (5mm 8mm) Plastic QFN 40C to 125C LT3596IUHG PBF LT3596IUHG TRPBF 3596 40C to 125C 52-Lead (5mm 8mm) Plastic QFN Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: