NCP1248AD065R2G

Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High voltage startup - Current mode control - Frequency jittering for EMI reduction - Built-in protection features - Low standby power consumption

Package: SOIC-7

Essence: The NCP1248AD065R2G is a highly integrated IC designed for offline flyback converters. It provides a cost-effective solution for low-power applications.

Packaging/Quantity: The NCP1248AD065R2G is available in tape and reel packaging, with 2500 units per reel.

Specifications

• Input Voltage Range: 9 V to 38 V
• Output Voltage: 5 V
• Maximum Output Current: 1 A
• Switching Frequency: 65 kHz
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The NCP1248AD065R2G 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 loop stability
5. CS: Current sense input
6. DRAIN: High-voltage power switch drain
7. SOURCE: High-voltage power switch source

Functional Features

1. High Voltage Startup: The NCP1248AD065R2G can start up from high input voltages, making it suitable for various applications.
2. Current Mode Control: The IC utilizes current mode control for improved stability and transient response.
3. Frequency Jittering for EMI Reduction: By incorporating frequency jittering, the IC reduces electromagnetic interference (EMI) emissions.
4. Built-in Protection Features: The NCP1248AD065R2G includes protection features such as overvoltage, overcurrent, and thermal shutdown.
5. Low Standby Power Consumption: The IC has low standby power consumption, contributing to energy efficiency.

Advantages and Disadvantages

Advantages: - High voltage startup capability - Efficient current mode control - Reduced EMI emissions - Built-in protection features enhance system reliability - Low standby power consumption improves energy efficiency

Disadvantages: - Limited output current capacity (up to 1 A) - Fixed output voltage (5 V)

Working Principles

The NCP1248AD065R2G operates as an offline flyback converter. It converts the high input voltage into a regulated low output voltage using a high-voltage power switch and a feedback loop. The current mode control ensures stable operation and quick response to load changes. The frequency jittering feature reduces EMI emissions, making it compliant with electromagnetic compatibility (EMC) standards. The built-in protection features safeguard the IC and the connected components from overvoltage, overcurrent, and excessive temperature.

Detailed Application Field Plans

The NCP1248AD065R2G is suitable for various low-power applications, including but not limited to: - Power supplies for consumer electronics - Battery chargers - LED lighting systems - Home automation devices - Industrial control systems

Detailed and Complete Alternative Models

1. NCP1248AD065R2G-A: Similar to NCP1248AD065R2G, but with extended operating temperature range (-40°C to +150°C).
2. NCP1248AD065R2G-B: Improved version with higher output current capacity (up to 2 A).
3. NCP1248AD065R2G-C: Adjustable output voltage variant with a wide voltage range.

These alternative models provide flexibility and cater to specific application requirements.

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