LT3598EUF(RevA) View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT3598EUF
(Rev.:RevA)

6-String 30mA LED Driver with 1.5% Current Matching

Linear Technology 

TYPICAL APPLICATIONS

Auto Battery Powered Driver for 20 LEDs with 90mA Each String

PVIN

6V TO 40V

C1

2.2μF

L1

4.7μH

D1

VIN

5V

C3

2.2μF

VIN

100k

OPENLED

SHDN SHDN

CTRL CTRL

PWM PWM

SW

VOUT

VO_SW

R4

1.00M

FB

R5

30.9k

SYNC

RT

LT3598

R1

51.1k

VREF

R10

20k

CTRL

LED1

LED2

R8

60.4k

LED3

LED4

LED5

LED6

TSET ISET

SS

GND VC

C4

RC

R7

C5

0.1μF

5.11k

100k

56pF R3

9.76k

CC

6.8nF

C1: NIPPON CHEMI-CON KTS500B225M32NOTOO

C2: MURATA GRM32ER71H475KA88L

C3: TAIYO YUDEN LMK212BJ225MG

D1: VISHAY SS3H9

L1: WÜRTH ELEKTRONIK 7447785004

C2

4.7μF

90mA

3598 TA04a

LT3598

Efficiency

95

90

85

80

75

70

65

60

0 20 40 60 80 100 120 140 160 180

TOTAL LED CURRENT (mA)

3598 TA04b

Dimming Range 1000:1 PWM,

10ms Period (125°C Junction Temperature)

PWM

5V/DIV

ILED1

100mA/DIV

5μs/DIV

3598 TA04c

3598fa

19

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