ISL78227 Datasheet, PDF (17/43 Pages) Intersil Corporation – 2-Phase Boost Controller with Integrated Drivers

ISL78227
Performance Curves Unless otherwise specified, operating conditions for the oscilloscope waveforms are V_IN = 12V,
V_OUT = 36V and T_A = +25°C. (Continued)
V_OUT 20.0V/DIV
PVCC 2.0V/DIV
PGOOD 5.0V/DIV
PGOOD 3.0V/DIV
PH1 30.0V/DIV
SS 2.0V/DIV
SS 3.0V/DIV
5ms/DIV
FIGURE 11. SOFT-START, DE MODE (DE/PHDRP = VCC), I_OUT = 8A
PH1 30.0V/DIV
20ms/DIV
FIGURE 12. EN SHUTDOWN, PVCC/PGOOD/SS FALL, I_OUT = 0A
PGOOD 5.0V/DIV
V_OUT 20.0V/DIV
PH1 40.0V/DIV
PH2 40.0V/DIV
20µs/DIV
FIGURE 13. EN SHUTDOWN, I_OUT = 8A
I_L1 4.0A/DIV
LG2 5.0V/DIV
LG1 5.0V/DIV
V_OUT 30.0V/DIV
10µs/DIV
FIGURE 14. CCM MODE (DE/PHDRP = GND), PHASE 1 INDUCTOR
RIPPLE CURRENT, I_OUT = 0A
PGOOD 4.0V/DIV
V_OUT 20.0V/DIV
PH2 30.0V/DIV
PH1 30.0V/DIV
5ms/DIV
FIGURE 15. EN SHUTDOWN, I_OUT = 8A
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I_L2 4.0A/DIV
LG2 5.0V/DIV
LG1 5.0V/DIV
V_OUT 30.0V/DIV
10µs/DIV
FIGURE 16. CCM MODE (DE/PHDRP = GND), PHASE 2 INDUCTOR
RIPPLE CURRENT, I_OUT = 0A
FN8808.2
February 24, 2016