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ACT4921QI Scheda tecnica(PDF) 18 Page - Active-Semi, Inc |
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ACT4921QI Scheda tecnica(HTML) 18 Page - Active-Semi, Inc |
18 / 35 page ACT4921QI Rev 1.0, 18-Jan-2018 Innovative PowerTM www.active-semi.com ActiveSwitcherTM is a trademark of Active-Semi Copyright © 2018 Active-Semi, Inc. 18 UV/POR eFuse Soft‐Start VIN ‐ VOUT < 200mV Soft‐start done Supplement Mode Health Check repeats every 4min eFuse over current TJ > 155°C VIN > UVLO eFuse not in OC & TJ < 155°C & 100ms delay eFuse over current TJ > 155°C STR < PG_THR Or TJ > 135° C Or LDO UV Or Storage cap OV Or Boot cap fail Normal Mode Health Check Storage cap < 3.0V Buck output UV/OV Buck OC LDO UV Compensation pin short to GND Shutdown Mode EN UV/OV VIN OV eFuse OC VIN ‐ VOUT > 300mV VINS UV TJ > 155°C STR > PG_THR &TJ < 135° C & LDO not UV & Storage cap not OV & Boot cap not fail Supplement‐ Disable Mode Figure 3: State Machine Diagram Table 2: Enabled Functions in Different States States eFuse Boost Buck BFET VREF UV/POR Disabled Disabled Disabled Disabled Disabled SOFT-START Enabled Disabled Disabled Disabled Enabled NORMAL Enabled Enabled Disabled Enabled Enabled HEALT CHECK Enabled Enabled Disabled Enabled Enabled SUPPLEMENT Disabled Disabled Enabled Enabled Enabled SUPPLEMENT-DISABLE Enabled Disabled Disabled Enabled Enabled SHUTDOWN Disabled Disabled Disabled Disabled Disabled |
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