NCP1611ADR2G

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - High efficiency - Low standby power consumption - Wide input voltage range - Adjustable output voltage - Overcurrent protection - Overvoltage protection

Package: SOIC-8

Essence: The NCP1611ADR2G is a voltage mode PWM controller designed for high-efficiency offline flyback converters. It provides precise control over the output voltage and offers various protection features to ensure safe operation.

Packaging/Quantity: The NCP1611ADR2G is available in a standard SOIC-8 package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 85V - 265V AC
• Output Voltage Range: 5V - 24V DC
• Maximum Output Power: 10W
• Operating Frequency: 65kHz - 100kHz
• Standby Power Consumption: <100mW
• Overcurrent Protection Threshold: Adjustable
• Overvoltage Protection Threshold: Adjustable

Detailed Pin Configuration

The NCP1611ADR2G has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. COMP: Compensation pin for feedback loop
4. CS: Current sense input
5. FB: Feedback input for output voltage regulation
6. RT: Timing resistor connection for frequency adjustment
7. CT: Timing capacitor connection for frequency adjustment
8. DRAIN: Switching transistor drain connection

Functional Features

• Voltage mode control with adjustable output voltage
• Internal oscillator for fixed-frequency operation
• Soft-start function for controlled startup
• Overcurrent protection with adjustable threshold
• Overvoltage protection with adjustable threshold
• Cycle-by-cycle current limiting
• Leading-edge blanking for improved noise immunity

Advantages and Disadvantages

Advantages: - High efficiency operation - Wide input voltage range allows for universal compatibility - Adjustable output voltage provides flexibility - Comprehensive protection features ensure safe operation - Compact SOIC-8 package for space-constrained applications

Disadvantages: - Limited maximum output power (10W) - Requires external components for complete circuit implementation

Working Principles

The NCP1611ADR2G operates as a voltage mode PWM controller in an offline flyback converter. It regulates the output voltage by adjusting the duty cycle of the switching transistor. The internal oscillator generates a fixed-frequency signal, which controls the switching frequency of the transistor.

During normal operation, the feedback voltage is compared to a reference voltage, and the error signal is used to adjust the duty cycle. This ensures that the output voltage remains stable and within the desired range. The controller also incorporates various protection mechanisms, such as overcurrent and overvoltage protection, to safeguard the circuit and connected devices.

Detailed Application Field Plans

The NCP1611ADR2G is commonly used in various applications, including:

1. Power adapters for consumer electronics
2. LED lighting drivers
3. Battery chargers
4. Industrial power supplies
5. Home automation systems

Its high efficiency, wide input voltage range, and adjustable output voltage make it suitable for a wide range of applications requiring efficient power conversion.

Detailed and Complete Alternative Models

1. NCP1612ADR2G
2. NCP1613ADR2G
3. NCP1614ADR2G
4. NCP1615ADR2G
5. NCP1616ADR2G

These alternative models offer similar functionality and characteristics to the NCP1611ADR2G but may have different specifications or additional features. It is recommended to review the datasheets of each model for detailed information.

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