ACT4911
8 V Power Loss Protection Device with 10 A eFuse
Key Features
- Wide 2.7 to 8 V operating input range
- 10 V max input blocking voltage
- Adjustable bus voltage start-up slew rate for inrush current control
- Configurable input power failure level
- Programmable up to 10 A input current limit
- Programmable 5 to 36 V boost storage voltage
- 36 V @ 6 A synchronous buck supports 100% duty cycle
- Programmable up to 1.13 MHz buck operating frequency for small inductor size
- Undetectable transition from input supply to capacitor bank power
- Compatible with different types of storage capacitors
- ADC monitoring of critical signals
- Autonomous health monitoring for detection of earlier storage capacitor failures
- Configurable interrupts to inform host of any faults/status changes
- eFuse, boost, and buck UV/OV/OC protection
- Thermal alert and protection
Qorvo's ACT4911 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 product 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 ADC and 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 capacitors is not sufficient for backup power. The ADC also measures the input voltage, output voltage, storage voltage, eFuse current and die temperature. The built-in synchronous buck converter maximizes energy transfer from the storage caps to the system.
ACT4911 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 in the thermal enhanced QFN5x5 28 pin package.
Typical Applications
- Solid-State Drives
- Industrial Applications
- Backup Power
- Hot Plug Devices
Product Categories
Application Categories
| Operating Input Range(V) | 2.7 to 8 |
| eFuse Abs Max Voltage(V) | 10 |
| eFuse FET RDS(on)(mohm) | 17 |
| Storage Cap Voltage(V) | 5 to 36 |
| Max Input Current(A) | 10 |
| Buck FET RDS(on)(mohm) | 45 (HS), 28 (LS) |
| Buck Current(A) | 6 |
| Buck Operation Frequency(kHz) | 330 to 1,130 |
| Blocking FET(mohm) | N/A |
| Interface | I2C |
| Autonomous Health Monitoring | Yes |
| ADC | Yes |
| Package Type | QFN, 28-pin |
| Package(mm) | 5 x 5 |
| RoHS | Yes |
| Lead Free | Yes |
| Halogen Free | Yes |
| ITAR Restricted | No |
| ECCN | EAR99 |
ACT4911EVK1-301 Evaluation Kit
ACT4911EVK1-301 Evaluation Tool User's Guide
This document describes the characteristic and operation of the Qorvo ACT4911EVK1QW301 evaluation kit (EVK). It provides setup and operation instructions, schematic, layout, BOM, and test data. This EVK demonstrates the ACT4911QW301 eFuse power management IC.
Other ACT4911QWxxx options can be evaluated on this EVK by replacing the IC and any other necessary components.
ACT4911 GUI
The ACT4911 GUI is a graphical interface that gives the user access to the ACT4911 internal registers. It is specifically designed for use with the ACT4911 EVK. The GUI allows the user to both read and modify the registers to configure the EVK specifically for the desired operating conditions. Note that GUI communication with the ACT4911 EVK requires the Qorvo USB-TO-I²C dongle.