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ACT4921 Datasheet(PDF) 18 Page - Qorvo, Inc

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

ACT4921 Datasheet(HTML) 18 Page - Qorvo, Inc

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Data Sheet Rev. B, January 2020 | Subject to change without notice
18 of 35
www.qorvo.com
© 2020 Qorvo US, Inc. All rights reserved.
ACT4921
Power Loss Protection with 6A eFuse
Table 3: IC Functionality vs Operating Conditions.
Operation
Conditions
eFuse
Blocking
FET
Boost
Buck
PLI
PG_VO
PG_STR
nIRQ
IC Action
Normal Operation
On
On
Enabled
Off
High
High
High
High
Boost Charges
STR Cap as
needed
Input OC
Vin - Vout < 560mV
On
On
Enabled
Off
High
High
High
Low
eFuse in LDO
Mode
Input OC
Vin - Vout > 560mV
On → Off
Off
Off
On
Low
Low
High → Low
Low
Enter
Supplement
Mode
VBUS Short
On → Off
On
Off
On
Low
Low
High → Low
Low
Enter
Supplement
Mode
Input Over Voltage
On → Off
On
Off
On
Low
High
High → Low
Low
Enter
Supplement
Mode
Input Under Voltage
On → Off
On
Off
On
Low
High
High → Low
Low
Enter
Supplement
Mode
EN Pin Low
(@ Start up)
Off
Off
Off
Off
Low
Low
Low
Low
IC is disabled
EN Pin Low (@
Normal Operation)
On → Off
Off
Off
On
Low
Low
High → Low
Low
Enter supple-
ment mode
first, then IC is
disabled
ENB Pin Low
On
Off
Off
Off
No
Effect
No
Effect
Depends on
Vstr
Low
Disables Boost
& Buck, turns
off Blocking
FET
Health Checking
On
On
Off
Off
High
High
High
High
If failed,
PS_STR and
nIRQ go low
120°C < Tj < 145 °C
On
On
Enabled
Off
High
High
High
Low
Sends out ther-
mal alert
145 °C < Tj < 155 °C
On
On
Off
Off
High
High
Depends on
Vstr
Low
PG_STG
depends on
Vstr
Tj > 155 °C
Off
Off
Off
Off
Low
Low
Low
Low
IC is disabled



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