NCP1370ADR2G

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High-performance power factor correction (PFC) controller - Designed for offline switch-mode power supplies (SMPS) - Enables high-efficiency conversion of AC input voltage to DC output voltage - Supports universal input voltage range - Provides improved power factor and low total harmonic distortion (THD) - Offers protection features such as overvoltage, overcurrent, and overtemperature protection

Package: SOIC-8 (Small Outline Integrated Circuit)

Essence: The NCP1370ADR2G is a highly efficient PFC controller that enables the conversion of AC input voltage to DC output voltage with improved power factor and low THD.

Packaging/Quantity: The NCP1370ADR2G is available in tape and reel packaging. Each reel contains 2500 units.

Specifications

• Input Voltage Range: 85VAC to 265VAC
• Output Voltage Range: 400VDC to 800VDC
• Maximum Output Power: 300W
• Operating Frequency: 65kHz to 115kHz
• Standby Power Consumption: <100mW
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The NCP1370ADR2G has the following pin configuration:

1. VCC: Power supply voltage input
2. CS: Current sense input
3. COMP: Compensation pin for loop stability
4. FB: Feedback pin for output voltage regulation
5. GND: Ground reference
6. RT: Timing resistor connection for frequency control
7. CT: Timing capacitor connection for frequency control
8. HV: High-voltage pin for connecting to the boost diode and MOSFET drain

Functional Features

• High power factor correction (PFC) efficiency
• Low total harmonic distortion (THD)
• Wide input voltage range for universal compatibility
• Protection features including overvoltage, overcurrent, and overtemperature protection
• Soft-start function for smooth startup
• Frequency jittering to reduce EMI emissions
• Cycle-by-cycle current limit for enhanced safety

Advantages

• High efficiency PFC operation reduces power consumption and energy costs
• Improved power factor compliance with regulatory standards
• Enhanced reliability and protection against voltage and current fluctuations
• Compact SOIC-8 package allows for space-saving designs
• Wide operating temperature range enables usage in various environments

Disadvantages

• Requires external components for complete power supply design
• Limited output power capability compared to higher-rated PFC controllers
• Higher cost compared to non-PFC power supply solutions

Working Principles

The NCP1370ADR2G operates based on the critical conduction mode (CRM) control technique. It uses a boost converter topology to achieve power factor correction. The controller regulates the switching frequency and duty cycle of the MOSFET to maintain a high power factor and low THD. By adjusting the timing resistor (RT) and timing capacitor (CT), the desired operating frequency can be set.

Detailed Application Field Plans

The NCP1370ADR2G is commonly used in the following applications:

1. Switch-mode power supplies (SMPS) for desktop computers
2. LED lighting systems
3. Industrial power supplies
4. Consumer electronics
5. Telecommunication equipment

Detailed and Complete Alternative Models

1. NCP1653ADR2G
2. NCP1606BDR2G
3. UCC28070PWG4
4. L6562ADTR
5. FAN7529MX

These alternative models offer similar functionality and can be considered as substitutes for the NCP1370ADR2G in various power factor correction applications.

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