LT3491_15 datasheet(2/16 Pages) LINER

2 / 16 page

LT3491

3491fa

Input Voltage (VIN) ................................................. 12V

SW Voltage ............................................................. 32V

CAP Voltage ............................................................ 32V

CTRL Voltage .......................................................... 12V

Consult LTC Marketing for parts specified with wider operating temperature ranges.

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

LT3491ESC8

LBXQ

TJMAX = 125°C, θJA = 270°C/ W

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.5

LED Current Sense Voltage (VCAP – VLED)VCAP = 30V

●

190

200

210

CAP, LED Pin Bias Current

VCAP = 16V, VLED = 16V

µA

VCAP, VLED Common Mode Minimum Voltage

2.5

Supply Current

VCAP = 16V, VLED = 15V, CTRL = 3V

2.6

CTRL = 0V

µA

Switching Frequency

1.8

2.3

2.8

MHz

Maximum Duty Cycle

●

Switch Current Limit

●

260

350

Switch VCESAT

ISW = 200mA

200

Switch Leakage Current

VSW = 16V

0.1

µA

VCTRL for Full LED Current

VCAP = 30V

●

1.5

VCTRL to Shut Down IC

VCTRL to Turn On IC

●

100

CTRL Pin Bias Current

100

CAP Pin Overvoltage Protection

●

Schottky Forward Drop

ISCHOTTKY = 100mA

0.8

Schottky Leakage Current

VR = 20V

µA

The

● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.

VIN = 3V, VCTRL = 3V, unless otherwise specified.

ELECTRICAL CHARACTERISTICS

SW 1

GND 2

GND 3

GND 4

8 CAP

7 LED

6 CTRL

5 VIN

TOP VIEW

SC8 PACKAGE

8-LEAD PLASTIC SC70

LED Voltage ............................................................ 32V

Operating Temperature Range (Note 2) .. – 40

°C to 85°C

Maximum Junction Temperature ......................... 125

°C

Storage Temperature Range ................ – 65

°C to 150°C

Lead Temperature (Soldering, 10sec, SC-70) ......... 300

°C

TOP VIEW

CTRL

LED

CAP

VIN

GND

DC PACKAGE

6-LEAD (2mm

× 2mm) PLASTIC DFN

TJMAX = 125°C, θJA = 102°C/W, θJC = 20°C/ W

EXPOSED PAD (PIN 7) SHOULD BE CONNECTED TO PCB GROUND

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/

ORDER PART NUMBER

DC PART MARKING

LT3491EDC

LCHJ

ORDER PART NUMBER

DC PART MARKING

LT3491 Arkusz danych(PDF) 2 Page - Linear Technology

LT3491 Arkusz danych(HTML) 2 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Arkusz danych Pobierz

Link URL