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| ISL78227 Datasheet, PDF (18/43 Pages) Intersil Corporation – 2-Phase Boost Controller with Integrated Drivers | |||
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ISL78227
Performance Curves Unless otherwise specified, operating conditions for the oscilloscope waveforms are VIN = 12V,
VOUT = 36V and TA = +25°C. (Continued)
PGOOD 4.0V/DIV
VOUT 10.0V/DIV
VOUT 1.0V/DIV WITH 36V OFFSET
PH2 20.0V/DIV
PH2 30.0V/DIV
PH1 20.0V/DIV
5µs/DIV
FIGURE 17. DE MODE (DE/PHDRP = VCC), DIODE EMULATION
OPERATION, PULSE SKIPPING, IOUT = 0A
PH1 30.0V/DIV
2µs/DIV
FIGURE 18. DE MODE (DE/PHDRP = VCC), DIODE EMULATION
OPERATION, IOUT = 29mA
VOUT 10.0V/DIV
VOUT 10.0V/DIV
PH2 30.0V/DIV
PH1 30.0V/DIV
10µs/DIV
PH1 30.0V/DIV
FIGURE 19. DE MODE (DE/PHDRP = VCC), PH1 AND PH2 DIODE
EMULATION OPERATION, PULSE SKIPPING, IOUT = 7mA
PH2 30.0V/DIV
2µs/DIV
FIGURE 20. DE+PH_DROP MODE (DE/PHDRP = FLOAT), PH1 DIODE
EMULATION WITH PH2 DROPPED, IOUT = 29mA
VOUT 10.0V/DIV
PH1 30.0V/DIV
PH2 30.0V/DIV
10µs/DIV
FIGURE 21. DE+PHDRP MODE (DE/PHDRP = FLOAT), PH1 DIODE
EMULATION WITH PH2 DROPPED, IOUT = 7mA
Submit Document Feedback 18
IMON 300mV/DIV
I_LOAD 5.0A/DIV
PH1 30.0V/DIV
PH2 30.0V/DIV
10ms/DIV
FIGURE 22. DE+PHDRP MODE (DE/PHDRP = FLOAT), PH2 ADDED
AND DROPPED, UNDER TRANSIENT STEP LOAD OF 1A
TO 8A
FN8808.2
February 24, 2016
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