LT3496 Triple Output LED Driver Fserutae Dnoitpircse n True Color PWM Dimming Delivers Up to 3000:1 The LT 3496 is a triple output DC/DC converter designed Dimming Ratio to operate as a constant-current source and is ideal for n Built-In Gate Driver for PMOS LED Disconnect driving LEDs. The LT3496 works in buck, boost or buck- n Three Independent Driver Channels with 750mA, boost mode. The LT3496 uses a fixed frequency, current 45V Internal Switches mode architecture resulting in stable operation over a n Operates in Buck, Boost, Buck-Boost Modes wide range of supply and output voltages. A frequency n CTRL Pin Accurately Sets LED Current Sense adjust pin allows the user to program switching frequency Threshold Over a Range of 10mV to 100mV between 330kHz and 2.1MHz to optimize efficiency and n Adjustable Frequency: 330kHz to 2.1MHz external component size. n Open LED Protection The LT3496 supports 3000:1 dimming control on each n Wide V Supply Range: IN channel. Each of the three regulators is independently Operation from 3V to 30V operated by that channels PWM signal. The PWM feature Transient Protection to 40V allows precise adjustment of the color mixing or dimming n Surface Mount Components ratio of the LED source. Each of the three channels has n 28-Lead (4mm 5mm) QFN and TSSOP Packages a built-in gate driver to drive an external LED-disconnect P-channel MOSFET, allowing high dimming range. The a snoitacilpp output current range of each channel of the LT3496 is programmed with an external sense resistor. n RGB Lighting n Billboards and Large Displays The CTRL pins are used to adjust the LED currents either n Automotive and Avionic Lighting for analog dimming or overtemperature protection. n Constant-Current Sources L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT and True Color PWM are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7199560, 7321203, and others pending. t lacipy a noitacilpp High Dimming Ratio Triple Output LED Power Supply PV IN 42V 1F CAP1 CAP2 CAP3 3s 200m 200m 200m 3000:1 PWM Dimming at 120Hz LED3 LED1 LED2 TG1 TG2 TG3 PWM 5V/DIV 7 LEDs 0.5A 0.5A 0.5A I L 0.5A/DIV I 0.47F 0.47F 0.47F LED 18H 18H 18H 0.5A/DIV 3496 TA01b 0.5s/DIV SW1 SW2 SW3 TG1, TG2, TG3 CAP1, CAP2, CAP3 VC1, VC2, VC3 LED1, LED2, LED3 V REF 22k LT3496 V IN V CTRL1, CTRL2, CTRL3 IN 3V TO 24V PWM1, PWM2, PWM3 PWM1, PWM2, PWM3 f 470pF ADJ 1F SHDN SHDN OVP1, OVP2, OVP3 GND 3496 TA01a 3496ff LT3496 a etulosbMixa Mu M r sgnita (Note 1) V (Note 4) ...............................................................40V Operating Junction Temperature Range (Notes 2, 6) IN SW1, SW2, SW3, LED1, LED2, LED3, LT3496E ............................................ 40C to 125C CAP1, CAP2, CAP3....................................................45V LT3496I ............................................. 40C to 125C TG1, TG2, TG3 .................................... CAP 10V to CAP LT3496H ............................................ 40C to 150C PWM1, PWM2, PWM3 ..............................................20V Storage Temperature Range V , CTRL1, CTRL2, CTRL3, f , VC1, VC2, VC3, QFN .................................................... 65C to 150C REF ADJ OVP1, OVP2, OVP3 ..................................................2.5V TSSOP ................................................. 65C to 125C SHDN (Note 4) ...........................................................V Lead Temperature (Soldering, 10 sec) IN TSSOP ..............................................................300C p ni c no Fnoitarugi TOP VIEW TOP VIEW 1 V SHDN 28 IN 2 TG3 PWM3 27 3 LED3 PWM2 26 28 27 26 25 24 23 4 CAP3 PWM1 25 PWM1 1 22 CAP3 5 SW3 V 24 REF V 2 21 SW3 REF 6 SW2 CTRL3 23 CTRL3 3 20 SW2 7 CAP2 CTRL2 22 CTRL2 4 19 CAP2 29 29 8 LED2 CTRL1 21 CTRL1 5 18 LED2 9 TG2 f 20 f 6 17 TG2 ADJ ADJ 10 SW1 VC3 7 16 SW1 VC3 19 VC2 8 15 CAP1 11 CAP1 VC2 18 9 10 11 12 13 14 12 LED1 VC1 17 13 TG1 OVP3 16 14 OVP1 OVP2 15 UFD PACKAGE 28-LEAD (4mm s 5mm) PLASTIC QFN FE PACKAGE = 34C/W, = 2.7C/W JA JC 28-LEAD PLASTIC TSSOP EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB = 30C/W, = 10C/W JA JC EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB o r D re i n Fro Mnoita LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3496EFE PBF LT3496EFE TRPBF 3496FE 28-Lead Plastic TSSOP 40C to 125C LT3496IFE PBF LT3496IFE TRPBF 3496FE 28-Lead Plastic TSSOP 40C to 125C LT3496EUFD PBF LT3496EUFD TRPBF 3496 28-Lead (4mm 5mm) Plastic QFN 40C to 125C LT3496IUFD PBF LT3496IUFD TRPBF 3496 28-Lead (4mm 5mm) Plastic QFN 40C to 125C LT3496HUFD PBF LT3496HUFD TRPBF 3496 28-Lead (4mm 5mm) Plastic QFN 40C to 150C 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: