Rainbow-electronics MAX17061 Manual de usuario descargar pdf (Pagina 9)

MAX17061

8-String White LED Driver with

SMBus for LCD Panel Applications

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuit of Figure 1, V

= 12V, C

CCV

= 0.022µF, R

CCV

= 5.1kΩ, V

ISET

= V

OSC

= V

, R

FSET

= 464kΩ, V

PWMI

= GND, LEDs =

10 series x 4 parallel strings, T

= +25°C, unless otherwise noted.)

LED-OPEN FAULT PROTECTION

(BRIGHTNESS = 100%, LED OPEN ON FB1)

MAX17061 toc14

400μs/div

FB1

1V/div

FB2

20mA/div

FB2

10V/div

OUT

20V/div

0mA

LED-SHORT FAULT PROTECTION

(BRT = 100%, 2 LEDs SHORT ON FB1)

MAX17061 toc15

1ms/div

FB1

5V/div

FB2

10V/div

FB2

20mA/div

FB1

20mA/div

0mA

LINE TRANSIENT RESPONSE

= 12V→19V, BRIGHTNESS = 100%)

MAX17061 toc16

100μs/div

OUT

20V/div

1A/div

FB1

20mA/div

10V/div

0mA

LINE TRANSIENT RESPONSE

= 19V→12V, BRIGHTNESS = 100%)

MAX17061 toc17

100μs/div

OUT

20V/div

1A/div

FB1

20mA/div

10V/div

0mA

LED CURRENT BALANCE

vs. INPUT VOLTAGE

MAX17061 toc18

LED CURRENT BALANCE (%)

17 2014118

-0.2

0.2

0.6

1.0

-1.0

-0.6

INPUT VOLTAGE (V)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 25 26

MAX17061 1

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Rainbow-electronics MAX17061 Manual de usuario Pagina 9

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