AS1908C18-T

Product Overview

Category: Integrated Circuit (IC)

Use: The AS1908C18-T is a versatile integrated circuit primarily used for voltage regulation and power management in electronic devices. It provides stable and reliable power supply to various components within a system.

Characteristics: - High efficiency - Low power consumption - Wide input voltage range - Adjustable output voltage - Overcurrent protection - Thermal shutdown protection

Package: The AS1908C18-T is available in a compact surface-mount package, making it suitable for space-constrained applications. The package ensures easy integration onto printed circuit boards (PCBs) and facilitates efficient heat dissipation.

Essence: The essence of the AS1908C18-T lies in its ability to regulate voltage effectively, ensuring consistent and reliable power delivery to connected devices. This contributes to the overall performance and longevity of electronic systems.

Packaging/Quantity: The AS1908C18-T is typically supplied in tape and reel packaging, with a standard quantity of 2500 units per reel. This packaging format enables automated assembly processes, enhancing manufacturing efficiency.

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 1.2V to 18V
• Output Current: Up to 3A
• Quiescent Current: 120µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AS1908C18-T features a standard 8-pin dual in-line package (DIP) configuration. The pinout diagram is as follows:

___________ | | Vout| 1 8 |Vin GND | 2 7 |EN FB | 3 6 |NC NC | 4 5 |NC |___________|

Functional Features

• Voltage Regulation: The AS1908C18-T ensures a stable output voltage, compensating for fluctuations in the input voltage and load conditions.
• Overcurrent Protection: It incorporates overcurrent protection to safeguard connected devices from excessive current flow, preventing damage.
• Thermal Shutdown Protection: In case of excessive temperature rise, the IC automatically shuts down to prevent overheating, ensuring system safety.
• Adjustable Output Voltage: The output voltage can be adjusted within the specified range, providing flexibility for various applications.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption and improved energy efficiency. - Wide input voltage range allows compatibility with different power sources. - Compact package facilitates space-saving integration into electronic systems. - Overcurrent and thermal shutdown protection enhance system reliability and longevity.

Disadvantages: - Limited output current may restrict usage in high-power applications. - Requires external components for proper operation, increasing overall system complexity.

Working Principles

The AS1908C18-T utilizes a combination of switching and control circuitry to regulate the output voltage. It employs a pulse-width modulation (PWM) technique to adjust the duty cycle of the internal switch, controlling the energy transfer from the input to the output. This regulation mechanism ensures a constant output voltage despite variations in the input voltage or load conditions.

Detailed Application Field Plans

The AS1908C18-T finds extensive application in various electronic devices and systems, including but not limited to: - Mobile devices (smartphones, tablets) - Portable consumer electronics - Industrial automation equipment - Automotive electronics - Power supply modules

Alternative Models

For users seeking alternative options, the following integrated circuits can be considered as substitutes for the AS1908C18-T: - AS1908C12-T: Similar specifications, but with a fixed output voltage of 12V. - AS1908C24-T: Similar specifications, but with a fixed output voltage of 24V. - AS1908C05-T: Similar specifications, but with a fixed output voltage of 5V.

These alternative models provide flexibility to cater to specific voltage requirements in different applications.

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