NCP1337PG

Product Overview

Category

NCP1337PG belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various power supply systems, including switch-mode power supplies (SMPS), battery chargers, and LED drivers.

Characteristics

• High efficiency: The NCP1337PG offers excellent power conversion efficiency, reducing energy waste.
• Wide input voltage range: It can operate with input voltages ranging from 85V to 265V, making it suitable for different power sources.
• Protection features: The IC incorporates various protection mechanisms such as overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.
• Compact package: NCP1337PG is available in a small outline package (SOP), enabling space-saving designs.
• Low standby power consumption: It consumes minimal power during standby mode, enhancing energy efficiency.

Package and Quantity

The NCP1337PG is typically packaged in a 8-pin SOP. It is commonly sold in reels containing a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 85V - 265V AC
• Output Voltage Range: Adjustable, depending on the application
• Maximum Output Power: Varies based on the external components used
• Operating Temperature Range: -40°C to +125°C
• Switching Frequency: Typically around 65kHz

Detailed Pin Configuration

1. VCC: Power supply input pin.
2. GND: Ground reference pin.
3. FB: Feedback pin for regulating the output voltage.
4. COMP: Compensation pin for stability control.
5. CS: Current sense pin for current limit regulation.
6. DRAIN: Switching transistor drain pin.
7. VCCSENSE: Voltage sensing pin for overvoltage protection.
8. VCCUVLO: Under-voltage lockout pin for power supply monitoring.

Functional Features

• Constant current mode (CCM) operation for stable output regulation.
• Frequency jittering to reduce electromagnetic interference (EMI).
• Soft-start function to limit inrush current during startup.
• Cycle-by-cycle current limiting for overcurrent protection.
• Auto-restart feature for fault recovery and system reliability.

Advantages and Disadvantages

Advantages

• High efficiency leads to energy savings.
• Wide input voltage range allows for versatile applications.
• Compact package enables space-efficient designs.
• Comprehensive protection features enhance system reliability.
• Low standby power consumption reduces wasted energy.

Disadvantages

• Limited maximum output power compared to higher-power ICs.
• Requires external components for complete power supply implementation.
• May require additional circuitry for specific application requirements.

Working Principles

The NCP1337PG operates as a pulse width modulation (PWM) controller, regulating the output voltage by controlling the duty cycle of the switching transistor. It utilizes feedback from the FB pin to adjust the duty cycle based on the difference between the desired output voltage and the sensed voltage. By continuously adjusting the duty cycle, the IC maintains a stable output voltage even with varying input conditions.

Detailed Application Field Plans

The NCP1337PG finds extensive use in various power management applications, including: 1. Switch-mode power supplies (SMPS) for computers, televisions, and other electronic devices. 2. Battery chargers for portable electronics, electric vehicles, and renewable energy systems. 3. LED drivers for lighting applications, such as streetlights, automotive lighting, and indoor illumination.

Detailed and Complete Alternative Models

1. NCP1342PG: Similar to NCP1337PG but offers higher maximum output power.
2. NCP1351PG: Provides additional features like power factor correction (PFC) for improved efficiency.
3. NCP1362PG: Suitable for applications requiring higher switching frequencies.

These alternative models offer different specifications and features, allowing designers to choose the most suitable IC for their specific requirements.

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