Datasheet LT3478, LT3478-1 (Analog Devices) - 2

HerstellerAnalog Devices
Beschreibung4.5A Monolithic LED Drivers with True Color PWM Dimming
Seiten / Seite24 / 2 — ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order …
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DokumentenspracheEnglisch

ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order Options. The. ELECTRICAL CHARACTERISTICS

ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) Order Options The ELECTRICAL CHARACTERISTICS

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LT3478/LT3478-1
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
TOP VIEW SW ..42V V SW 1 16 SS OUT, LED ..42V V SW 2 15 RT IN, VS, VL, ⎯S⎯H⎯D⎯N (Note 5) ...36V V 3 14 PWM PWM ...15V IN V 4 13 CTRL2 CTRL1, 2 ...6V S 17 L 5 12 CTRL1 SS, RT, VC, VREF, OVPSET ..2V V 6 11 OUT SHDN Operating Junction Temperature Range LED 7 10 VREF (Notes 2, 3, 4) .. –40°C to 125°C OVPSET 8 9 VC Storage Temperature Range ... –65°C to 150°C FE PACKAGE Lead Temperature (Soldering, 10 Sec) .. 300°C 16-LEAD PLASTIC TSSOP TJMAX = 125°C, θJA = 35°C/W EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB. ORDER PART NUMBER FE PART MARKING LT3478EFE 3478FE LT3478EFE-1 3478FE-1 LT3478IFE 3478FE LT3478IFE-1 3478FE-1
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
The ELECTRICAL CHARACTERISTICS

denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. SW = open, VIN = VS = L = VOUT =

S

H

D

N = 2.7V, LED = open, SS = open, PWM = CTRL1, CTRL2 = 1.25V, VREF = open, VC = open, RT = 31.6k. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage (Rising) ● 2.4 2.8 V Operational Input Voltage VS 2.8 36 V VIN (Note 5) 2.8 36 V VIN Quiescent Current VC = 0V (No Switching) 6.1 mA VIN Shutdown Current ⎯S⎯H⎯D⎯N = 0V 3 6 µA ⎯S⎯H⎯D⎯N Pin Threshold (VSD_µp) (Micropower) ● 0.1 0.4 0.7 V ⎯S⎯H⎯D⎯N Pin Threshold (VSD_UVLO) (Switching) 1.3 1.4 1.5 V ⎯S⎯H⎯D⎯N Pin Current ⎯S⎯H⎯D⎯N = VSD_UVLO – 50mV 8 10 12 µA ⎯S⎯H⎯D⎯N = VSD_UVLO + 50mV 0 µA VREF Voltage I(VREF) = 0µA, VC = 0V ● 1.213 1.240 1.263 V VREF Line Regulation I(VREF) = 0µA, 2.7V < VIN < 36V 0.005 0.015 %/V VREF Load Regulation 0 < I(VREF) < 100µA (Max) 8 12 mV Frequency: fOSC 200kHz RT = 200k 0.18 0.2 0.22 MHz Frequency: fOSC 1MHz RT = 31.6k ● 0.88 1.12 MHz 34781f 2