NCP1217P133

Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - Low-power offline switching regulator - High voltage startup - Current mode control - Built-in protection features - Wide input voltage range - Small package size

Package: DIP-8 (Dual In-line Package)

Essence: The NCP1217P133 is a low-power offline switching regulator IC designed for power management applications. It offers high voltage startup, current mode control, and built-in protection features in a compact DIP-8 package.

Packaging/Quantity: The NCP1217P133 is typically sold in reels or tubes containing multiple units.

Specifications

The NCP1217P133 has the following specifications:

• Input Voltage Range: 85V to 265V AC
• Output Voltage Range: 5V to 24V DC
• Maximum Output Current: 100mA
• Switching Frequency: 65kHz
• Operating Temperature Range: -40°C to +125°C
• Efficiency: Up to 80%
• Standby Power Consumption: Less than 100mW

Pin Configuration

The NCP1217P133 has a standard DIP-8 pin configuration as follows:

_____ VCC |1 8| GND FB |2 7| COMP CS |3 6| RT DRAIN|4 5| SOURCE -----

Functional Features

The NCP1217P133 offers the following functional features:

1. Low-Power Operation: Designed for efficient power management with low standby power consumption.
2. High Voltage Startup: Capable of starting up from a wide input voltage range of 85V to 265V AC.
3. Current Mode Control: Utilizes current mode control for improved stability and response to load variations.
4. Built-in Protection Features: Includes overvoltage protection, overcurrent protection, and thermal shutdown to safeguard the circuit and connected devices.

Advantages and Disadvantages

Advantages: - Low-power operation reduces energy consumption. - Wide input voltage range allows for versatile applications. - Compact DIP-8 package enables space-saving designs. - Built-in protection features enhance system reliability.

Disadvantages: - Limited maximum output current of 100mA may not be suitable for high-power applications. - Switching frequency of 65kHz may cause audible noise in certain sensitive applications.

Working Principles

The NCP1217P133 operates as a low-power offline switching regulator. It uses current mode control to regulate the output voltage based on the feedback received from the FB (Feedback) pin. The CS (Current Sense) pin monitors the current flowing through the power switch, while the COMP (Compensation) pin adjusts the control loop for stability.

When the input voltage is within the specified range, the NCP1217P133 starts up and generates a regulated output voltage. It continuously monitors the load conditions and adjusts the duty cycle of the internal power switch to maintain the desired output voltage. The built-in protection features ensure safe operation by detecting and responding to abnormal conditions such as overvoltage, overcurrent, and excessive temperature.

Detailed Application Field Plans

The NCP1217P133 is commonly used in various power management applications, including but not limited to:

1. Consumer Electronics: Power supplies for televisions, set-top boxes, audio systems, and other home appliances.
2. Industrial Equipment: Power management for industrial automation systems, motor controls, and lighting fixtures.
3. LED Lighting: LED driver circuits for residential, commercial, and automotive lighting applications.
4. Smart Home Devices: Power management solutions for smart thermostats, security systems, and IoT devices.

Alternative Models

In addition to the NCP1217P133, there are several alternative models available in the market that offer similar functionality. Some notable alternatives include:

1. NCP1216P100: Similar low-power offline switching regulator with a different pin configuration.
2. LM2576-5.0: Buck converter IC with a higher maximum output current of 3A.
3. LT8301: Isolated flyback converter IC suitable for high-voltage applications.

These alternative models can be considered based on specific requirements and design constraints.

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