ACT4921 datasheet(1/35 Pages) QORVO

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/

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ACT4921

Power Loss Protection with 6A eFuse

Data Sheet Rev. B, January 2020 | Subject to change without notice

1 of 35

www.qorvo.com

FEATURES

• Optimized for Low Voltage Applications

• 2.6-to-7V Operating Input Range

• 8V Max Input Blocking Voltage

• Adjustable In-rush Current Control

• Configurable Input Power Failure Level

• Programmable up to 6A Input Current Limit

• Programmable 5V to 28V Boost Storage Voltage

• 28V@4A Synchronous Buck Supports 100%

Duty Cycle

• Programmable

up to 2.25MHz Buck Operating

Frequency for Small Inductor Size

• Power Loss, Vout Power Good, and Storage Cap

Power Good Indicators

• Compatible with Different Types of Storage Caps:

Super Caps, Electrolytic, Tantalum, POSCAP etc.

• Autonomous Health Monitoring for Detection of

Earlier Storage Capacitor Failures

• Configurable

Interrupts to Inform Host for any

Faults/Status Change

• eFuse, Boost, and Buck UV/OV/OC Protection

• Thermal Alert and Protection

• Thermal Enhanced FCQFN 4x4-32 package

APPLICATIONS

• Solid State Drives

• Power Backup Systems

• Industrial Applications

• eFuse

• Hot Plug Devices

GENERAL DESCRIPTION

The ACT4921 device is a highly integrated power loss

protection IC. It provides backup storage power in the

event of an input power failure. A built-in boost converter

provides high voltage energy storage to minimize

storage capacitor size requirements. The built-in buck

converter regulates the storage voltage to a fixed output

voltage. It contains internal, back-to-back eFuse FETs

to provide bi-directional input to output isolation. The IC

also provides hot swap and inrush current control.

The ACT4921 is very flexible and can easily be

configured with I2C and external components. It

features programmable storage capacitor voltage to

optimize the storage capacitor sizing and system run

time. The internal health monitoring provide an extra

layer of protection and improve system reliability and

early capacitor failure notification. It automatically

checks the storage capacitor health and notifies the

user when the energy in the storage caps is not

sufficient for backup power. The built-in synchronous

buck converter maximizes energy transfer from the

storage caps to the system.

ACT4921 provides an I2C bus interface to allow MCU

control and monitoring. There are supervisor monitors

for the input voltage, output voltage, and storage

voltage. It is available with the thermal enhanced QFN

4x4 32 pin package.

28V Buck/Boost

Controller

Caps

Health Monitor/

ADC

Input 2.6V-7V

Blocking up to 8V

2.6V-6V

5V-28V

40mΩ

FET

25mΩ

FET

PMU

System

Core/Flash

5V-28V

eFuse 20mΩ

Inrush Controller

Blocking

FET

Ähnliche Beschreibung - ACT4921

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Texas Instruments	TPS259250	1Mb / 35P	Simple 5V/12V eFuse Protection Switches
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Active-Semi, Inc	ACT4910QW	3Mb / 34P	Power Loss Protection with 6A eFuse Rev 1.0, 15-Sept-2017
	ACT4911QW	3Mb / 33P	Power Loss Protection with 6A eFuse Rev 1.0, 15-Sept-2017
	ACT4921QI	3Mb / 35P	Power Loss Protection with 6A eFuse Rev 1.0, 18-Jan-2018
Texas Instruments	TPS2663	4Mb / 52P	60-V, 6-A Power limiting, surge protection industrial eFuse
Littelfuse	LS2406ERQ23	1Mb / 14P	28V, 6A eFuse with True Reverse Blocking and Fast Role Swap GD. 09/26/22
Littelfuse	LS24062RQ23	1Mb / 16P	28V 6A Bidirectional eFuse with Dual Port Independent Current Limit Setting 2022 Littelfuse, Inc.
Analog Devices	MAX17527A	1Mb / 32P	5.5V to 60V, 6A Power Limiter with OV, UV, Reverse Polarity, Loss of Ground Protection Rev 0; 11/22

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