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ACT4921 Datenblatt(PDF) 17 Page - Qorvo, Inc

Teilenummer ACT4921
Bauteilbeschribung  Power Loss Protection with 6A eFuse
PDF  35 Pages
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Hersteller  QORVO [Qorvo, Inc]
Direct Link  https://www.qorvo.com/
Logo QORVO - Qorvo, Inc

ACT4921 Datenblatt(HTML) 17 Page - Qorvo, Inc

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Data Sheet Rev. B, January 2020 | Subject to change without notice
17 of 35
www.qorvo.com
© 2020 Qorvo US, Inc. All rights reserved.
ACT4921
Power Loss Protection with 6A eFuse
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 f ail
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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