NCP1247DD100R2G

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-8

Essence: The NCP1247DD100R2G is a highly integrated PWM controller IC designed for offline flyback converters. It provides a cost-effective solution for low-power applications.

Packaging/Quantity: The NCP1247DD100R2G is available in a standard SOIC-8 package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 9V to 38V
• Output Voltage Range: 5V to 24V
• Maximum Output Power: 10W
• Switching Frequency: 65kHz to 115kHz
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The NCP1247DD100R2G has the following pin configuration:

```

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| | --| VCC GND|-- Pin 1: Ground --| FB CS |-- Pin 2: Current Sense --| COMP D |-- Pin 3: Duty Cycle Control --| SS NC |-- Pin 4: Not Connected --| VREF NC |-- Pin 5: Not Connected --| HV NC |-- Pin 6: Not Connected --| DRAIN NC |-- Pin 7: Not Connected --| VCC GND|-- Pin 8: Ground |___________| ```

Functional Features

• High voltage startup enables operation from a wide input voltage range.
• Current mode control ensures stable and accurate regulation.
• Frequency jittering reduces electromagnetic interference (EMI).
• Built-in protection features include overvoltage, overcurrent, and overtemperature protection.
• Low standby power consumption enhances energy efficiency.

Advantages

• Cost-effective solution for low-power applications.
• Wide input voltage range allows for versatile use.
• Integrated protection features enhance system reliability.
• Low standby power consumption improves energy efficiency.
• Frequency jittering reduces EMI emissions.

Disadvantages

• Limited output power capability (up to 10W).
• Not suitable for high-power applications.
• Requires external components for complete circuit implementation.

Working Principles

The NCP1247DD100R2G operates as a pulse width modulation (PWM) controller in an offline flyback converter. It uses current mode control to regulate the output voltage. The IC starts up at high voltage and maintains stable operation across a wide input voltage range. Frequency jittering is employed to reduce electromagnetic interference. The built-in protection features ensure safe operation by monitoring various parameters such as overvoltage, overcurrent, and overtemperature conditions.

Application Field Plans

The NCP1247DD100R2G is commonly used in low-power applications that require efficient power management. Some typical application fields include:

1. Consumer Electronics: Power supplies for set-top boxes, DVD players, and audio systems.
2. Home Automation: Power management for smart home devices and appliances.
3. LED Lighting: LED driver circuits for low-power lighting applications.
4. Industrial Control: Power supplies for industrial control systems and equipment.
5. Automotive Electronics: Power management for automotive infotainment systems and accessories.

Alternative Models

1. NCP1247AD100R2G
2. NCP1247BD100R2G
3. NCP1247CD100R2G
4. NCP1247ED100R2G

These alternative models offer similar functionality and characteristics to the NCP1247DD100R2G, providing flexibility in design choices.

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