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LTC4225IGN-2
Product Overview
Category: Integrated Circuits (ICs)
Use: The LTC4225IGN-2 is a high voltage ideal diode controller designed for use in power management applications. It allows the user to replace traditional diodes with more efficient MOSFET-based solutions.
Characteristics: - High voltage operation - Low quiescent current - Fast response time - Overvoltage protection - Reverse current blocking - Fault detection and reporting
Package: The LTC4225IGN-2 comes in a 16-pin SSOP package, which provides good thermal performance and ease of assembly.
Essence: The essence of LTC4225IGN-2 lies in its ability to control the flow of current in power management systems, providing improved efficiency and protection against faults.
Packaging/Quantity: The LTC4225IGN-2 is typically sold in reels of 250 units.
Specifications
- Input Voltage Range: 4V to 80V
- Quiescent Current: 50µA
- Operating Temperature Range: -40°C to 85°C
- Fault Detection Threshold: Adjustable
- Maximum Continuous Current: 10A
Pin Configuration
The LTC4225IGN-2 has the following pin configuration:
- VCC
- GATE
- FLT
- EN
- GND
- NC
- NC
- NC
- NC
- NC
- NC
- NC
- NC
- NC
- NC
- VIN
Functional Features
- Ideal diode function: Replaces traditional diodes with low voltage drop MOSFETs, reducing power losses.
- Overvoltage protection: Monitors the input voltage and shuts off the MOSFET when it exceeds a set threshold.
- Reverse current blocking: Prevents reverse current flow from the output to the input.
- Fault detection and reporting: Detects faults such as overvoltage, undervoltage, and overcurrent conditions, and provides a fault signal for system protection.
Advantages and Disadvantages
Advantages: - Improved efficiency compared to traditional diodes - Fast response time for fault detection and protection - Adjustable fault detection threshold for customization - Low quiescent current for power savings - Reverse current blocking prevents damage to the system
Disadvantages: - Limited maximum continuous current of 10A - Requires external MOSFETs for operation
Working Principles
The LTC4225IGN-2 operates by controlling the gate voltage of an external N-channel MOSFET. When the input voltage is within the desired range, the MOSFET is turned on, allowing current to flow from the input to the output. If the input voltage exceeds the set threshold, the MOSFET is turned off, blocking the current flow and protecting the system from overvoltage. The device also monitors for reverse current and various fault conditions, providing a fault signal for system shutdown or other protective actions.
Detailed Application Field Plans
The LTC4225IGN-2 finds applications in various power management systems, including:
- Battery charging circuits
- Power supply redundancy systems
- Load sharing and hot-swapping applications
- Automotive and industrial power distribution systems
- Uninterruptible power supplies (UPS)
- Solar power systems
Detailed and Complete Alternative Models
- LTC4359: High voltage ideal diode controller with adjustable fault detection threshold and reverse current blocking.
- MAX40200: Dual ideal diode controller with integrated MOSFETs for higher current applications.
- TPS2490: Hot swap controller with integrated ideal diode functionality and fault detection.
These alternative models offer similar features and can be considered based on specific application requirements.
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10个与LTC4225IGN-2在技术解决方案中的应用相关的常见问题及解答
Sure! Here are 10 common questions and answers related to the application of LTC4225IGN-2:
Q: What is LTC4225IGN-2? A: LTC4225IGN-2 is a dual-supply hot swap controller designed for protecting circuitry on power supply boards.
Q: What is the purpose of LTC4225IGN-2? A: The purpose of LTC4225IGN-2 is to provide protection against overcurrent faults, undervoltage conditions, and reverse voltage conditions during hot swapping of power supplies.
Q: How does LTC4225IGN-2 protect against overcurrent faults? A: LTC4225IGN-2 monitors the current flowing through an external sense resistor and shuts off the external N-channel MOSFET if the current exceeds a set threshold.
Q: Can LTC4225IGN-2 handle reverse voltage conditions? A: Yes, LTC4225IGN-2 has built-in protection against reverse voltage conditions, ensuring that the circuitry is not damaged.
Q: Is LTC4225IGN-2 suitable for high-power applications? A: Yes, LTC4225IGN-2 can handle high-power applications as it supports up to 80V operating voltage and has a low RDS(ON) internal MOSFET.
Q: How does LTC4225IGN-2 handle undervoltage conditions? A: LTC4225IGN-2 continuously monitors the input voltage and disables the external MOSFET if the voltage falls below a specified threshold.
Q: Can LTC4225IGN-2 be used in redundant power supply systems? A: Yes, LTC4225IGN-2 is commonly used in redundant power supply systems to ensure seamless switchover between power sources.
Q: What is the maximum current that LTC4225IGN-2 can handle? A: LTC4225IGN-2 can handle a maximum current of up to 10A.
Q: Does LTC4225IGN-2 have any built-in fault reporting capabilities? A: Yes, LTC4225IGN-2 provides fault reporting through an open-drain FAULT pin, which can be monitored by external circuitry.
Q: Are there any application notes or reference designs available for LTC4225IGN-2? A: Yes, Linear Technology (now part of Analog Devices) provides application notes and reference designs on their website, which can help in implementing LTC4225IGN-2 in various technical solutions.
Please note that these answers are general and may vary depending on the specific requirements and configurations of your technical solution. It's always recommended to refer to the LTC4225IGN-2 datasheet and consult with the manufacturer or technical support for accurate and detailed information.