ISL97650 데이터 시트보기 (PDF) - Intersil

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ISL97650

4-Channel Integrated LCD Supply

Intersil 

Typical Performance Curves (Continued)

ISL97650

Ch1 = LX(buck)(5V/DIV)

Ch2 = Io(Buck)(10mA/DIV)

Ch1 = LX(buck)(5V/DIV)

Ch2 = Io(Buck)(10mA/DIV)

400ns/DIV

FIGURE 9. BUCK DISCONTINUOUS MODE

Ch1 = VIN Ch2 = LX, Ch3 = AVDD, Ch4 = IINDUCTOR

400ns/DIV

FIGURE 10. THRESHOLD OF BUCK FROM DC TO CC MODE

Ch1 = AVDD(VBOOST)(100mV/DIV)

Ch2 = Io(Boost)(100mA/DIV)

FIGURE 11. BOOST CONVERTER PULSE-SKIPPING MODE

WAVEFORM

Ch1 = VLOGIC(VBUCK)(10mV/DIV)

Ch2 = Io(Buck)(100mA/DIV)

1ms/DIV

FIGURE 12. TRANSIENT RESPONSE OF BOOST

Ch1 = CDLY, Ch2 = VREF, Ch3 = VLOGIC, Ch4 = VON

R1 = AVDD, R2 = AVDD_DELAY, R3 = VOFF

1ms/DIV

FIGURE 13. TRANSIENT RESPONSE OF BUCK

7

FIGURE 14. START-UP SEQUENCE

FN9198.4

April 17, 2009

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