B120 datasheet(2/20 Pages) LINER

Part #	B120

Description	True Color PWM Delivers Constant Color with 400:1 Dimming Range

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT3474/LT3474-1

2

3474fd

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VIN Pin ........................................................(–0.3V), 36V

BIAS Pin....................................................................25V

BOOST Pin Voltage ...................................................51V

BOOST above SW Pin ...............................................25V

OUT, LED Pins (LT3474)............................................15V

OUT, LED Pins (LT3474-1).........................................26V

PWM Pin...................................................................10V

VADJ Pin .....................................................................6V

VC, REF, RT Pins ..........................................................3V

SHDN Pin...................................................................VIN

BIAS Pin Current.........................................................1A

Maximum Junction Temperature (Note 2)............. 125°C

Operating Temperature Range (Note 3)

LT3474E, LT3474E-1 ............................ –40°C to 85°C

LT3474I, LT3474I-1............................ –40°C to 125°C

Storage Temperature Range................... –65°C to 150°C

Lead Temperature (Soldering, 10 sec) .................. 300°C

(Note 1)

FE PACKAGE

16-LEAD PLASTIC TSSOP

1

2

3

4

5

6

7

8

TOP VIEW

16

15

14

13

12

11

10

9

DNC*

OUT

LED

VIN

SW

BOOST

BIAS

GND

DNC*

GND

PWM

VADJ

VC

REF

SHDN

RT

17

θJC = 8°C/W, θJA = 40°C/W

EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB

*DO NOT CONNECT EXTERNAL CIRCUITRY TO THESE PINS.

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3474EFE#PBF

LT3474EFE#TRPBF

3474EFE

16-Lead TSSOP

–40°C to 85°C

LT3474IFE#PBF

LT3474IFE#TRPBF

3474IFE

16-Lead TSSOP

–40°C to 125°C

LT3474EFE-1#PBF

LT3474EFE-1#TRPBF

3474EFE-1

16-Lead TSSOP

–40°C to 85°C

LT3474IFE-1#PBF

LT3474IFE-1#TRPBF

3474IFE-1

16-Lead TSSOP

–40°C to 125°C

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

Consult LTC Marketing for information on non-standard lead based ﬁnish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel speciﬁcations, go to: http://www.linear.com/tapeandreel/

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Input Voltage

l

3.5

4

V

Input Quiescent Current

Not Switching

2.6

4

mA

Shutdown Current

SHDN = 0.3V, VBOOST = 0V, VOUT = 0V

0.01

2

μA

LED Pin Current

VADJ Tied to VREF

VADJ Tied to VREF/5

l

0.98

0.968

0.193

0.186

1

0.2

1.02

1.025

0.207

0.210

A

REF Voltage

l

1.23

1.25

1.265

V

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 12V, VBOOST = 16V, VOUT = 4V unless otherwise noted (Note 3).

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