Overview
The LTC4041EUFD#PBF is a comprehensive supercapacitor backup system designed by Analog Devices Inc. This integrated circuit is tailored for applications requiring reliable power management, particularly in scenarios where backup power is crucial. The LTC4041EUFD#PBF integrates a high-current step-down DC/DC converter, a backup battery charger, and various control features to ensure seamless power transition and efficient charging of supercapacitors.
This device is suitable for a wide range of applications, including ride-through Dying Gasp supplies, high current ride-through 3V to 5V UPS, power meters, industrial alarms, servers, and solid state drives. Its compact 24-lead QFN package makes it ideal for space-constrained designs.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | LTC4041EUFD#PBF |
| Package Type | 24-Lead QFN (4mm x 5mm x 0.75mm) |
| Number of Pins | 24 |
| Min Supply Voltage | 2.9V |
| Max Supply Voltage | 5.5V |
| Output Current | 2.5A |
| Number of Cells | 2 (single or in series) |
| Max Junction Temperature (Tj) | 125°C |
| Max Operating Temperature | 125°C |
| Min Operating Temperature | -40°C |
| RoHS Status | Non-Compliant |
Key Features
- Programmable Charge Current and Voltage: Allows for customization of charge settings based on specific power requirements.
- High-Current Step-Down DC/DC Converter: Charges a single supercapacitor or two supercapacitors in series.
- Backup Boost Regulator: Delivers up to 2.5A from the supercapacitor to the system output during power failure.
- Internal Supercapacitor Balancer: Maintains equal voltages across each supercapacitor and limits the maximum voltage of each supercapacitor.
- Automatic Seamless Switch-Over to Backup Mode: Includes an input power fail indicator and system power good indicator.
- Low Quiescent Current in Shutdown: Up to 11µA max in shutdown mode.
- Wide Input Voltage Range: Accommodates various power sources, including USB, wall adapters, and solar panels.
- Overvoltage Protection and Undervoltage Lockout: Ensures safe operation under varying voltage conditions.
Applications
- Ride-Through Dying Gasp Supplies: Provides backup power during temporary power losses.
- High Current Ride-Through 3V to 5V UPS: Suitable for uninterruptible power supply systems.
- Power Meters and Industrial Alarms: Ensures continuous operation in monitoring and alarm systems.
- Servers and Solid State Drives: Provides reliable backup power for data storage and server applications).
- Portable Electronics: Ideal for battery-powered devices such as smartphones, tablets, and wearable devices).
Q & A
- What is the primary function of the LTC4041EUFD#PBF?
The LTC4041EUFD#PBF is a complete supercapacitor backup system that includes a high-current step-down DC/DC converter and a backup battery charger to manage power efficiently.
- What is the maximum output current of the LTC4041EUFD#PBF?
The maximum output current is 2.5A.
- What types of supercapacitors can the LTC4041EUFD#PBF charge?
The device can charge a single supercapacitor or two supercapacitors in series.
- What is the operating temperature range of the LTC4041EUFD#PBF?
The operating temperature range is from -40°C to 125°C.
- Does the LTC4041EUFD#PBF have internal supercapacitor balancing?
Yes, it includes an internal supercapacitor balancing circuit to maintain equal voltages across each supercapacitor.
- What is the package type of the LTC4041EUFD#PBF?
The package type is a 24-lead QFN (4mm x 5mm x 0.75mm).
- Is the LTC4041EUFD#PBF RoHS compliant?
No, the LTC4041EUFD#PBF is not RoHS compliant.
- What are some typical applications of the LTC4041EUFD#PBF?
Typical applications include ride-through Dying Gasp supplies, high current ride-through 3V to 5V UPS, power meters, industrial alarms, servers, and solid state drives.
- How does the LTC4041EUFD#PBF handle power failure?
During power failure, the device automatically switches to backup mode, using the boost regulator to deliver power from the supercapacitor to the system output.
- What is the quiescent current in shutdown mode for the LTC4041EUFD#PBF?
The quiescent current in shutdown mode is up to 11µA max.
