LTC4225IGN-1

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 SSOP

Essence: The LTC4225IGN-1 is an integrated circuit that functions as a dual ideal diode controller. It provides low voltage drop and reverse current blocking, making it suitable for power management and control applications.

Packaging/Quantity: The LTC4225IGN-1 is available in a 16-Lead SSOP package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 2.9V to 18V
• Operating Temperature Range: -40°C to 85°C
• Quiescent Current: 50µA (typical)
• Maximum Continuous Current: 10A
• Fault Threshold: 7% (typical)
• Fault Response Time: 200ns (typical)

Detailed Pin Configuration

The LTC4225IGN-1 has the following pin configuration:

1. VCC1: Positive supply voltage for Channel 1
2. GATE1: Gate drive output for Channel 1
3. SOURCE1: Source connection for Channel 1
4. SENSE1: Sense input for Channel 1
5. FLT1: Fault indication output for Channel 1
6. GND: Ground connection
7. FLT2: Fault indication output for Channel 2
8. SENSE2: Sense input for Channel 2
9. SOURCE2: Source connection for Channel 2
10. GATE2: Gate drive output for Channel 2
11. VCC2: Positive supply voltage for Channel 2 12-16. NC: No Connection

Functional Features

1. Dual Ideal Diode Controller: The LTC4225IGN-1 allows two power sources to be connected in parallel without the need for external diodes. It ensures that the power source with the higher voltage supplies the load while blocking reverse current flow.

2. Low Voltage Drop: The integrated circuit minimizes voltage drop across the ideal diode, resulting in efficient power transfer.

3. Overvoltage Protection: The LTC4225IGN-1 protects the load from excessive voltage by disconnecting the faulty power source.

4. Undervoltage Lockout: It prevents the load from operating at insufficient voltage levels by disabling the ideal diode when the input voltage falls below a certain threshold.

5. Fault Indication: The IC provides fault indication outputs (FLT1 and FLT2) to signal abnormal conditions such as overvoltage or undervoltage events.

6. Thermal Shutdown: In case of excessive temperature, the LTC4225IGN-1 shuts down to prevent damage to the device.

Advantages and Disadvantages

Advantages: - Enables seamless power source redundancy - Low voltage drop ensures efficient power transfer - Provides protection against overvoltage and undervoltage conditions - Compact and easy-to-use package

Disadvantages: - Limited maximum continuous current of 10A

Working Principles

The LTC4225IGN-1 operates by comparing the voltages of the two input power sources. It controls the gate drives of the external MOSFETs to ensure that the power source with the higher voltage supplies the load. Reverse current blocking is achieved by turning off the MOSFET associated with the lower voltage source. The IC continuously monitors the input voltages and reacts accordingly to protect the load from overvoltage and undervoltage conditions.

Detailed Application Field Plans

The LTC4225IGN-1 is commonly used in various applications, including: - Redundant power supply systems - Battery backup systems - Industrial control systems - Telecom and networking equipment - Automotive electronics

Detailed and Complete Alternative Models

1. LTC4357: Dual Ideal Diode OR Controller with Reverse Input Protection
2. LTC4412: Low Loss PowerPath Controller
3. LTC4413: High Voltage Ideal Diode-OR Controller

These alternative models offer similar functionality to the LTC4225IGN-1 and can be considered as alternatives based on specific application requirements.

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