NCP1011ST65T3 - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - Low-power offline Switcher - High voltage startup - Current mode control - Frequency jittering for EMI reduction - Built-in soft-start - Overload protection - Overvoltage protection - Overtemperature protection

Package: SOT-223

Essence: The NCP1011ST65T3 is a low-power offline switcher designed for power management applications. It provides high voltage startup, current mode control, and various protection features in a compact SOT-223 package.

Packaging/Quantity: The NCP1011ST65T3 is available in tape and reel packaging with 2500 units per reel.

Specifications

• Input Voltage Range: 85V to 265V AC
• Output Voltage Range: 5V to 24V DC
• Maximum Output Power: 6W
• Operating Temperature Range: -40°C to +125°C
• Efficiency: Up to 80%
• Frequency Jittering Range: 30kHz to 34kHz

Detailed Pin Configuration

The NCP1011ST65T3 has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. FB: Feedback pin for output voltage regulation
4. CS: Current sense pin for current mode control
5. DRAIN: Drain pin for power MOSFET
6. SOURCE: Source pin for power MOSFET

Functional Features

1. Low-Power Operation: The NCP1011ST65T3 is designed for low-power applications, making it suitable for energy-efficient devices.
2. High Voltage Startup: The integrated high voltage startup circuit allows the IC to operate from a wide input voltage range.
3. Current Mode Control: The current mode control ensures stable and accurate regulation of the output voltage.
4. Frequency Jittering: The frequency jittering feature reduces electromagnetic interference (EMI) emissions, ensuring compliance with regulatory standards.
5. Built-in Protections: The IC incorporates various protection mechanisms such as overload, overvoltage, and overtemperature protection, enhancing system reliability.

Advantages and Disadvantages

Advantages: - Low-power operation for energy-efficient applications - Wide input voltage range for versatile use - Stable and accurate output voltage regulation - Reduced EMI emissions for compliance with regulations - Built-in protections for enhanced system reliability

Disadvantages: - Limited maximum output power (6W) - Efficiency up to 80% may not be suitable for high-power applications

Working Principles

The NCP1011ST65T3 operates on the principle of current mode control. It senses the current flowing through the power MOSFET using the CS pin and adjusts the duty cycle of the switching waveform to regulate the output voltage. The integrated high voltage startup circuit enables the IC to start up from a wide input voltage range. Frequency jittering is employed to reduce EMI emissions. The IC also includes built-in protections to safeguard against overload, overvoltage, and overtemperature conditions.

Detailed Application Field Plans

The NCP1011ST65T3 is commonly used in various power management applications, including but not limited to: - AC-DC power supplies - LED lighting systems - Home appliances - Industrial equipment - Consumer electronics

Detailed and Complete Alternative Models

1. NCP1011AP065G: Similar low-power offline switcher with different package (PDIP-7)
2. NCP1011ST100T3G: Higher power version with a maximum output power of 10W
3. NCP1011ST130T3G: Higher power version with a maximum output power of 13W
4. NCP1011ST200T3G: Higher power version with a maximum output power of 20W

These alternative models offer similar functionality and characteristics, but with varying power capabilities to suit different application requirements.

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