Datasheet LT3756, LT3756-1, LT3756-2 (Analog Devices) - 26

LT3756/LT3756-1/LT3756-2
TYPICAL APPLICATION Buck Mode 1A LED Driver with High Dimming Ratio and Open LED Reporting Efficiency vs VIN
100 VIN 24V TO C3 80V C1 4.7µF 1M VIN ISP 96 1µF 200k 200k ×5 ×2 SHDN/UVLO 1.5k 0.1Ω 25V 1A 200k 61.9k Q2 V 92 REF ISN FB CTRL M2 20k 88 EFFICIENCY (%) PWM PWMOUT Q1 5 WHITE LEDs LT3756-2 84 INTV 20W CC 1k 100k L1 8020 30 40 50 60 70 80 33µH D1 OPENLED VIN (V) VIN 375612 TA05b SS GATE M1 C4 4.7µF
PWM Dimming Waveforms
RT SENSE 0.1µF VC GND INTVCC 0.033Ω 28.7k C2 375kHz 47k 4.7µF VPWM 0.001µF M1: VISHAY SILICONIX Si3430DV D1: DIODES INC B1100/B VSW L1: WÜRTH 74456133 50V/DIV 375612 TA05a M2: VISHAY SILICONIX Si5435BDC Q1: ZETEX FMMT493 1A Q2: ZETEX FMMT593 ILED 0A 375612 TA05c 10µs/DIV
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT3474 36V, 1A (ILED), 2MHz, Step-Down LED Driver VIN: 4V to 36V, VOUT(MAX) = 13.5V, True Color PWM Dimming = 400:1, ISD < 1µA, TSSOP16E Package LT3475 Dual 1.5A (ILED), 36V, 2MHz Step-Down LED Driver VIN: 4V to 36V, VOUT(MAX) = 13.5V, True Color PWM Dimming = 3000:1, ISD < 1µA, TSSOP20E Package LT3476 Quad Output 1.5A, 36V, 2MHz High Current LED Driver VIN: 2.8V to 16V, VOUT(MAX) = 36V, True Color PWM Dimming = 1000:1, with 1000:1 Dimming ISD < 10µA, 5mm × 7mm QFN Package LT3477 3A, 42V, 3MHz Boost, Buck-Boost, Buck LED Driver VIN: 2.5V to 25V, VOUT(MAX) = 40V, Dimming = Analog/PWM, ISD < 1µA, QFN and TSSOP20E Packages LT3478/LT3478-1 4.5A, 42V, 2.5MHz High Current LED Driver with VIN: 2.8V to 36V, VOUT(MAX) = 42V, True Color PWM Dimming = 3000:1, 3000:1 Dimming ISD < 3µA, TSSOP16E Package LT3486 Dual 1.3A, 2MHz High Current LED Driver VIN: 2.5V to 24V, VOUT(MAX) = 36V, True Color PWM Dimming = 1000:1, ISD < 1µA, 5mm × 3mm DFN and TSSOP16E Packages LT3496 Triple 0.75A, 2.1MHz, 45V LED Driver VIN: 3V to 30V, VOUT(MAX) = 45V, Dimming = 3000:1, ISD < 1µA, 4mm × 5mm QFN and TSSOP16E Packages LT3517 1.5A, 2.5MHz, 45V LED Driver VIN: 3V to 30V, VOUT(MAX) = 45V, Dimming = 3000:1, ISD < 1µA, 4mm × 4mm QFN and TSSOP16E Packages LT3518 2.3A, 2.5MHz, 45V LED Driver VIN: 3V to 30V, VOUT(MAX) = 45V, Dimming = 3000:1, ISD < 1µA, 4mm × 4mm QFN and TSSOP16E Packages LT3755/LT3755-1/ 40VIN, 75VOUT, Full Featured LED Controller VIN: 4.5V to 40V, VOUT(MAX) = 75V, True Color PWM Dimming = 3000:1, LT3755-2 ISD < 1µA, 3mm × 3mm QFN-16 and MS16E Packages LTC®3783 High Current LED Controller VIN: 3V to 36V, VOUT(MAX) = Ext FET, True Color PWM Dimming = 3000:1, ISD < 20µA, 5mm × 4mm QFN10 and TSSOP16E Packages Rev. C 26 02/20 www.analog.com For more information www.analog.com ANALOG DEVICES, INC. 2008–2020 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts