IR3821AMTRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency - Low power consumption - Compact size - Wide input voltage range - Multiple protection features

Package: 40-Lead QFN (Quad Flat No-Lead)

Essence: The IR3821AMTRPBF is a power management IC designed for efficient power conversion and regulation in various electronic devices.

Packaging/Quantity: The IR3821AMTRPBF is typically sold in reels containing 250 units per reel.

Specifications

• Input Voltage Range: 4.5V to 21V
• Output Voltage Range: 0.6V to 5.5V
• Maximum Continuous Output Current: 25A
• Switching Frequency: Up to 1.5MHz
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The IR3821AMTRPBF has a 40-pin QFN package with the following pin configuration:

1. VIN: Input Voltage
2. PGND: Power Ground
3. BOOT: Bootstrap Capacitor Connection
4. VDRV: Gate Driver Supply Voltage
5. LGATE: Low-Side MOSFET Gate Drive Output
6. PHASE: Phase Node Connection
7. VCC: Control Logic Supply Voltage
8. AGND: Analog Ground
9. COMP: Compensation Node Connection
10. FB: Feedback Voltage
11. SS: Soft-Start Time Setting
12. EN: Enable Input
13. RT: Oscillator Timing Resistor
14. CT: Oscillator Timing Capacitor
15. SYNC: Synchronization Input
16. OCSET: Overcurrent Protection Threshold Setting
17. OCP: Overcurrent Protection Output
18. SS/TRK: Soft-Start/Tracking Input
19. VSENSE: Current Sense Voltage
20. PGND: Power Ground

Functional Features

1. High Efficiency: The IR3821AMTRPBF utilizes advanced power conversion techniques to achieve high efficiency, reducing power loss and improving overall system performance.

2. Wide Input Voltage Range: With an input voltage range of 4.5V to 21V, the IC can be used in a wide variety of applications, accommodating different power supply configurations.

3. Multiple Protection Features: The IC incorporates various protection mechanisms such as overcurrent protection (OCP), overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown to ensure safe operation and prevent damage to the device and connected components.

4. Compact Size: The small form factor and integrated design of the IC make it suitable for space-constrained applications where size is a critical factor.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption and improved energy efficiency. - Wide input voltage range allows for versatile application possibilities. - Multiple protection features enhance system reliability and safety. - Compact size enables integration into small electronic devices.

Disadvantages: - Limited output current capacity may not be suitable for high-power applications. - Higher cost compared to some alternative models with similar specifications.

Working Principles

The IR3821AMTRPBF operates based on a switching regulator topology, specifically a buck converter. It converts a higher input voltage to a lower output voltage by rapidly switching the input voltage across an inductor and then filtering it to obtain a stable output voltage. The control circuitry within the IC regulates the switching frequency and duty cycle to maintain the desired output voltage.

Detailed Application Field Plans

The IR3821AMTRPBF finds applications in various fields, including but not limited to: - Computer motherboards - Servers and data centers - Industrial equipment - Telecommunications infrastructure - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

1. IR3821BMTRPBF: Similar specifications and features as the IR3821AMTRPBF, but with a different package (48-Lead QFN).
2. IR3810AMTRPBF: Lower output current capacity (10A) but otherwise similar specifications and features.
3. IR3842AMTRPBF: Higher output current capacity (40A) but with a larger package (56-Lead QFN).

These alternative models provide options for different power requirements and package preferences while maintaining similar functionality.

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