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Overview
| Topology | Other Topology |
| Input voltage | 3.3 V |
| Output 1 | 2 A |
| IC revision | 1.0 |
Description
The 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 equirements. The built-in buck converter regulates the storage voltage to a fixed output voltage. It contains internal, back-toback eFuse FETs to provide bi-directional input to output isolation. The IC also provides hot swap and inrush current control. The ACT4911 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 caps is not sufficient for backup power. The ADC also measures the input voltage, output voltage, storage voltage, eFuse current, and die temperature. The builtin 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 with the thermal enhanced QFN5x5 28 pins package.
Features
- Wide 2.7-to-8V Operating Input Range
- 10V Max Input Blocking Voltage
- Adjustable Bus Voltage Start-Up Slew Rate for InrushCurrent Control
- Configurable Input power Failure Level
- Programmable up to 10A Input Current Limit
- Programmable 5V to 36V Boost Storage Voltage
- 36V@6A Synchronous Buck Supports 100% DutyCycle
- Programmable up to 1.13MHz Buck Operating Frequencyfor Small Inductor Size
- Undetectable Transition from Input Supply to CapacitorBank Power
- Compatible with Different Types of Storage Caps:Super Caps, Electrolytic, Tantalum, POSCAP
- ADC Monitoring of Critical Signals
- 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 5×5-28 package
Typical applications
- Solid State Drive/ Hot Plug Devices
- Backup Power
- Industrial Applications
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Type | Wire Section | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | L(µH) | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | fres(MHz) | VOP(V) | Mount | L(mm) | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WR-TBL Series 213 - 5.00 mm Horiz.l Entry Modular, 2, Rising Cage Clamp | Simulation– | Downloads6 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-TBL Series 213 - 5.00 mm Horiz.l Entry Modular | Pins2 | PCB/Cable/PanelPCB | ModularityYes | TypeHorizontal | Wire Section 26 to 16 (AWG) 0.5 to 1.5 (mm²) | – | – | – | – | – | – | – | – | – | – | – | – | – | MountTHT | Length10 mm | – | Rated Current10 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | ||
 | WR-PHD Pin Header - Single, 2, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins2 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | – | – | MountTHT | Length5.08 mm | – | Rated Current3 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WE-MAPI SMT Power Inductor, 2, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Pins2 | – | – | – | – | – | – | – | – | – | – | – | Inductance2.2 µH | Performance Rated Current7.1 A | Saturation Current @ 30%9.2 A | DC Resistance22 mΩ | Self Resonant Frequency35 MHz | Operating Voltage80 V | MountSMT | Length4.3 mm | Height3.1 mm | Rated Current5.2 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WR-PHD Pin Header - Single, 4, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins4 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | – | – | MountTHT | Length10.16 mm | – | Rated Current3 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WL-SMCW SMT Mono-color Chip LED Waterclear, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | – | – | – | – | – | Dominant Wavelength [typ.]570 nm | Emitting ColorBright Green | Peak Wavelength [typ.]572 nm | Luminous Intensity [typ.]40 mcd | Forward Voltage [typ.]2 V | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]140 ° | – | – | – | – | – | – | MountSMT | Length1.6 mm | Height0.7 mm | – | – | Operating Temperature -40 °C up to +85 °C |