Datasheet LT3952A (Analog Devices) - 30

LT3952A
TYPICAL APPLICATION 3A Buck Mode LED Driver
VIN 82mΩ 12V TO 40V 1µF 9.6V FALLING UVLO 78.7k 50V VIN EN/UVLO ISP 12.4k ISN OVLO TG M1 IVINP CTRL IVINN VREF 3 TO 9 LED PWM PWM (3V TO 30V) DIM LT3952A IVINCOMP L1 3A D1 4.7µH INTV INTV CC CC 100k 2.2µF 4.7µF SW 50V OPENLED SHORTLED SHORTLED 2 FB × 4.7µF 50V ISMON GND VC 220Ω SS RT SYNC/SPRD 3952A TA06a 6.8nF 100nF 90.9k D1: DIODES, INC SBR3A40SA 1MHz L1: WURTH WE-LHMI74437346047 M1: VISHAY Si7309DN
LED Current vs Input Voltage Efficiency vs VIN
3.25 100 3.20 90 3 LED 3.15 3.10 80 EFFICIENCY (%) LED CURRENT (A) 3.05 70 3 LED (30W) 3.00 5 LED (50W) 7 LED (70W) 9 LED (90W) 2.95 60 10 20 30 40 10 20 30 40 VIN (V) VIN (V) 3952A TA06b 3952A TA06c
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