LTC4227IUFD-4#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management and Control

Characteristics: - Dual Ideal Diode Controller - Low Voltage Drop - Reverse Current Blocking - Overvoltage Protection - Undervoltage Lockout - Fault Indication - Thermal Shutdown

Package: 16-Lead QFN (Quad Flat No-Lead)

Essence: The LTC4227IUFD-4#TRPBF is an integrated circuit that functions as a dual ideal diode controller. It provides low voltage drop, reverse current blocking, overvoltage protection, undervoltage lockout, fault indication, and thermal shutdown features.

Packaging/Quantity: The LTC4227IUFD-4#TRPBF is available in a 16-Lead QFN package. The quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 2.9V to 18V
• Operating Temperature Range: -40°C to 85°C
• Maximum Continuous Current: 5A
• Fault Threshold: Adjustable
• Quiescent Current: 50µA (typical)
• Package Dimensions: 3mm x 3mm

Pin Configuration

The LTC4227IUFD-4#TRPBF has the following pin configuration:

1. GATE1: Gate of Channel 1
2. SOURCE1: Source of Channel 1
3. GND: Ground
4. GATE2: Gate of Channel 2
5. SOURCE2: Source of Channel 2
6. FLT1: Fault Indicator for Channel 1
7. FLT2: Fault Indicator for Channel 2
8. VCC: Supply Voltage
9. FB1: Feedback Input for Channel 1
10. FB2: Feedback Input for Channel 2
11. OV1: Overvoltage Threshold for Channel 1
12. OV2: Overvoltage Threshold for Channel 2
13. UV1: Undervoltage Threshold for Channel 1
14. UV2: Undervoltage Threshold for Channel 2
15. GND: Ground
16. GATE1: Gate of Channel 1

Functional Features

• Dual Ideal Diode Controller: Allows seamless switching between two power sources.
• Low Voltage Drop: Minimizes power loss across the diode.
• Reverse Current Blocking: Prevents current flow in the reverse direction.
• Overvoltage Protection: Safeguards against excessive voltage levels.
• Undervoltage Lockout: Ensures proper operation within specified voltage range.
• Fault Indication: Provides indication when a fault condition occurs.
• Thermal Shutdown: Protects the device from overheating.

Advantages and Disadvantages

Advantages: - Efficient power management and control. - Reduces power loss with low voltage drop. - Protects against reverse current flow and overvoltage. - Provides fault indication for easy troubleshooting. - Thermal shutdown prevents damage due to overheating.

Disadvantages: - Limited maximum continuous current (5A). - Requires careful consideration of input voltage range.

Working Principles

The LTC4227IUFD-4#TRPBF operates by controlling the gates of two external N-channel MOSFETs, acting as ideal diodes. It monitors the voltages across these diodes and adjusts the gate voltages accordingly to ensure smooth power source switching. The device also incorporates protection features such as overvoltage and undervoltage thresholds, reverse current blocking, fault indication, and thermal shutdown to enhance system reliability.

Detailed Application Field Plans

The LTC4227IUFD-4#TRPBF finds applications in various fields, including: 1. Power supply redundancy systems 2. Battery backup systems 3. Load sharing circuits 4. Industrial control systems 5. Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LTC4227IUFD-4#TRPBF are: 1. LTC4359: Ideal Diode Controller with Reverse Input Protection 2. LTC4412: Dual Low Loss PowerPath Controller 3. MAX40200: Dual Ideal Diode Controller with Adjustable Current Limit

These alternative models can be considered based on specific requirements and design constraints.

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