B0530W 查看數據表（PDF） - Linear Technology

零件编号

产品描述 (功能)

生产厂家

B0530W

Step-Down 1A LED Driver

Linear Technology 

LT3474/LT3474-1

TYPICAL APPLICATIONS

Step-Down 1A LED Driver with PWM Dimming

VIN

6V TO 36V

C1

2.2μF

50V

R1

80.6k

C4

3.3nF

R2

10k

C5

0.1μF

VIN

BOOST

SHDN

SW

LT3474

RT

BIAS

REF

OUT

VADJ

PWM

VC

LED

GND

D1: B140HB

C1 TO C3: X5R OR X7R

M1: Si2302ADS

LED1

M1

C3

0.22μF L1

6.3V 10μH

D1

C2

2.2μF

6.3V

PWM

3474 TA01

LED Current in PWM Mode

ILED1

500mA/DIV

V(PWM)

5V/DIV

1ms/DIV

Step-Down 1A LED Driver with

Two Series Connected LED Output

VIN

12V TO

36V

C1

2.2μF

50V

R1

33.2k

C4

0.1μF

VIN

SHDN

BOOST

SW

LT3474

RT

BIAS

REF

OUT

VADJ

PWM

VC

LED

GND

LED1

LED2

C3

0.22μF L1

10V 10μH

D1

1A

LED

CURRENT

C2

2.2μF

10V

D1: MBRM 140

C1 TO C3: X5R OR X7R

3474 TA02

Efficiency, Two LED Output

95

90

VIN = 12V

85

VIN = 24V

80

75

70

65

60

55

0

200 400 600 800 1000

LED CURRENT (mA)

3474 G01

3474fd

18

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