Rainbow-electronics MAX1611 Bedienungsanleitung PDF herunterladen (Seite 11)

MAX1610/MAX1611

Digitally Controlled CCFL Backlight

Power Supplies

______________________________________________________________________________________ 11

-1A

5µs/div

T1 

CENTER-TAP

VOLTAGE

C1

CURRENT



BATT = 10V, I

BATT

= 0.20A, 

MINDAC = 0.5V, D/A VALUE = 11111



FIGURE 4 CIRCUIT, C2 = 15pF, I

= 462mA, 

CCFL VL = 500V

RMS

10ms/div

SS

VOLTAGE

T1

CENTER-TAP

VOLTAGE

FIGURE 4 CIRCUIT, C2 = 15pF, 

R1 = 545Ω, 

CCFL VL = 500V

RMS

, BATT = 15V, 

MINDAC = 0.5V, D/A VALUE = 10000

Figure 5. Royer Oscillator Typical Operating Waveforms for

Circuit of Figure 4

Figure 6. Start-Up Waveforms for Circuit of Figure 4



MID-SCALE

REF / 8 = 250mV

FULL-SCALE

MIN-SCALE = MINDAC / 8

OmV

DAC CODE

CSAV REGULATION VOLTAGE

NOTE: DAC CODE 00000 FORCES THE BATT-TO-LX SWITCH OFF REGARDLESS OF CSAV OR MINDAC VOLTAGE.

00000

00001

00010

00011

00100

00101

00110

00111

01000

01001

01010

01011

01100

01101

01110

01111

10000

10001

10010

10011

10100

10101

10110

10111

11000

11001

11010

11011

11100

11101

11110

11111

Figure 7. CSAV Regulation Voltage Range

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 19 20

MAX1610/MAX1611 1
Power Supplies 1

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