NCP1249CD65R2G

Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency - Low standby power consumption - Wide input voltage range - Overvoltage protection - Overcurrent protection

Package: DFN-8 (Dual Flat No-Lead)

Essence: The NCP1249CD65R2G is a highly efficient integrated circuit used for power management applications. It offers various features such as low standby power consumption, wide input voltage range, and overvoltage/overcurrent protection. The IC is packaged in a DFN-8 package.

Packaging/Quantity: The NCP1249CD65R2G is typically sold in reels containing 3000 units per reel.

Specifications

• Input Voltage Range: 85V to 265V AC
• Output Voltage: 5V DC
• Maximum Output Current: 1.5A
• Switching Frequency: 65kHz
• Standby Power Consumption: <100mW
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The NCP1249CD65R2G has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. FB: Feedback pin for output voltage regulation
4. COMP: Compensation pin for stability control
5. CS: Current sense pin for overcurrent protection
6. SS: Soft-start pin for controlled startup
7. DRAIN: Switching transistor drain pin
8. SYNC: Synchronization pin for external clock input

Functional Features

1. High Efficiency: The NCP1249CD65R2G offers high efficiency, ensuring minimal power loss during operation.
2. Low Standby Power Consumption: With standby power consumption below 100mW, the IC helps reduce energy wastage during idle periods.
3. Wide Input Voltage Range: The integrated circuit can handle input voltages ranging from 85V to 265V AC, making it suitable for various power supply applications.
4. Overvoltage Protection: The IC incorporates overvoltage protection, safeguarding connected devices from voltage spikes.
5. Overcurrent Protection: It also features overcurrent protection, preventing damage due to excessive current flow.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power loss - Wide input voltage range allows for versatile applications - Overvoltage and overcurrent protection enhance device safety - Low standby power consumption reduces energy waste

Disadvantages: - Limited output current capacity (maximum 1.5A) - Requires external synchronization for precise clock control

Working Principles

The NCP1249CD65R2G operates as a flyback converter, converting the high input voltage to a regulated low output voltage. It utilizes a switching transistor to control the energy transfer between the primary and secondary windings of the transformer. The feedback mechanism ensures stable output voltage regulation, while the compensation pin helps maintain stability during load variations. The IC also incorporates soft-start functionality for controlled startup.

Application Field Plans

The NCP1249CD65R2G is commonly used in various power management applications, including: - Power adapters - LED lighting systems - Industrial power supplies - Home appliances - Consumer electronics

Alternative Models

Here are some alternative models that offer similar functionality:

1. TNY274PN - Power Integrations
2. FAN7602B - Fairchild Semiconductor
3. LNK304GN - Power Integrations
4. TOP256EN - Power Integrations
5. UC3843BN - Texas Instruments

These alternative models can be considered based on specific application requirements and availability.

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