NCP1351CDR2G - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High-performance current mode controller - Designed for offline flyback converters - Provides precise control of the output voltage and current - Offers protection features such as overvoltage, overcurrent, and overtemperature protection

Package: SOIC-8 (Small Outline Integrated Circuit)

Essence: The NCP1351CDR2G is a power management IC that serves as a current mode controller for offline flyback converters. It offers precise control of the output voltage and current while providing various protection features.

Packaging/Quantity: The NCP1351CDR2G is typically sold in reels containing 2500 units.

Specifications

• Input Voltage Range: 8V to 20V
• Output Voltage Range: 5V to 24V
• Maximum Switching Frequency: 500 kHz
• Operating Temperature Range: -40°C to +125°C
• Package Type: SOIC-8

Detailed Pin Configuration

The NCP1351CDR2G has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. CS: Current sense input
4. FB: Feedback input
5. COMP: Compensation pin
6. DRV: Gate driver output
7. DRAIN: Power MOSFET drain connection
8. SOURCE: Power MOSFET source connection

Functional Features

• Current mode control with adjustable slope compensation
• Internal leading-edge blanking for improved noise immunity
• Soft-start function for controlled startup
• Overvoltage protection (OVP)
• Overcurrent protection (OCP)
• Overtemperature protection (OTP)
• Under-voltage lockout (UVLO)
• Error amplifier with high gain and low offset voltage

Advantages and Disadvantages

Advantages: - Precise control of output voltage and current - Protection features ensure safe operation - Adjustable slope compensation for improved stability - Internal leading-edge blanking reduces noise interference - Soft-start function prevents excessive inrush current during startup

Disadvantages: - Limited input voltage range (8V to 20V) - Maximum switching frequency may not be suitable for all applications - Requires external components for complete power supply design

Working Principles

The NCP1351CDR2G operates as a current mode controller for offline flyback converters. It regulates the output voltage and current by adjusting the duty cycle of the power MOSFET. The current sense input (CS) monitors the current flowing through the power MOSFET, while the feedback input (FB) compares the actual output voltage with a reference voltage.

The error amplifier processes the voltage difference and generates an error signal, which is then used to adjust the duty cycle. The compensation pin (COMP) allows fine-tuning of the control loop stability by adding slope compensation.

The NCP1351CDR2G also incorporates various protection features such as overvoltage, overcurrent, and overtemperature protection. These safeguards ensure the safe operation of the power supply under abnormal conditions.

Detailed Application Field Plans

The NCP1351CDR2G is commonly used in various applications, including:

1. AC-DC power supplies
2. LED lighting drivers
3. Battery chargers
4. Industrial power systems
5. Consumer electronics

Its precise control capabilities, protection features, and compact package make it suitable for a wide range of power management applications.

Detailed and Complete Alternative Models

1. NCP1377BDR2G
2. NCP1396ADR2G
3. NCP1200P60G
4. NCP1216ADR2G
5. NCP1251ADR2G

These alternative models offer similar functionality and can be considered as substitutes for the NCP1351CDR2G in various power management applications.

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