MAX1611CSE データシートの表示（PDF） - Maxim Integrated

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MAX1611CSE

Digitally Controlled CCFL Backlight Power Supplies

Maxim Integrated 

Digitally Controlled CCFL Backlight

Power Supplies

FIGURE 4 CIRCUIT, C2 = 15pF, IR1 = 462mA,

CCFL VL = 500VRMS

BATT = 10V, IBATT = 0.20A,

MINDAC = 0.5V, D/A VALUE = 11111

6V

T1

CENTER-TAP

VOLTAGE

0V

1A

C1

CURRENT

-1A

5µs/div

Figure 5. Royer Oscillator Typical Operating Waveforms for

Circuit of Figure 4

REF / 8 = 250mV

FULL-SCALE

3V

FIGURE 4 CIRCUIT, C2 = 15pF,

R1 = 545Ω,

CCFL VL = 500VRMS, BATT = 15V,

MINDAC = 0.5V, D/A VALUE = 10000

SS

VOLTAGE

0V

6V

T1

CENTER-TAP

VOLTAGE

0V

10ms/div

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

MID-SCALE

MIN-SCALE = MINDAC / 8

OmV

DAC CODE

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

Figure 7. CSAV Regulation Voltage Range

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