NCP1012ST130T3

Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - Low-power offline Switcher - Fixed-frequency current-mode controller - High-voltage startup - Built-in frequency jittering for EMI reduction - Auto-restart after fault condition removal - Pulse-by-pulse current limiting - Overvoltage protection - Overtemperature protection

Package: TO-220, 5-pin

Essence: The NCP1012ST130T3 is a low-power offline switcher IC used in power management applications. It provides various features such as high-voltage startup, frequency jittering for EMI reduction, and overvoltage/overtemperature protection.

Packaging/Quantity: The NCP1012ST130T3 is available in a TO-220 package and is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 85V to 265V AC
• Output Power: Up to 10W
• Operating Frequency: 65kHz
• Maximum Duty Cycle: 72%
• Startup Current: 25μA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The NCP1012ST130T3 has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. CS: Current sense input
4. DRAIN: Power switch drain terminal
5. FB: Feedback input

Functional Features

1. Low-Power Operation: The NCP1012ST130T3 is designed for low-power applications, providing efficient power management with minimal energy consumption.
2. Frequency Jittering: Built-in frequency jittering helps reduce electromagnetic interference (EMI) emissions, ensuring compliance with regulatory standards.
3. Auto-Restart: After a fault condition is removed, the IC automatically restarts, ensuring continuous operation and protection against system failures.
4. Current Limiting: Pulse-by-pulse current limiting protects the circuit from excessive currents, preventing damage to the power supply and connected devices.
5. Overvoltage and Overtemperature Protection: The IC incorporates overvoltage and overtemperature protection mechanisms, safeguarding the system from potential damage.

Advantages

• Low-power consumption
• Compact size and easy integration
• Built-in protection features for enhanced reliability
• Compliance with EMI regulations
• Wide input voltage range for versatile applications

Disadvantages

• Limited output power capability (up to 10W)
• Restricted operating temperature range (-40°C to +125°C)

Working Principles

The NCP1012ST130T3 operates as a fixed-frequency current-mode controller. It regulates the power flow by controlling the duty cycle of the power switch based on the feedback received from the output. The IC starts up at high voltages and maintains stable operation throughout the specified input voltage range. It continuously monitors the current flowing through the power switch and adjusts it to prevent overcurrent conditions. In case of faults or abnormal conditions, the IC provides protection by shutting down the power switch and initiating an auto-restart sequence once the fault is resolved.

Application Field Plans

The NCP1012ST130T3 is commonly used in various power management applications, including but not limited to:

1. LED Lighting Systems
2. AC-DC Power Supplies
3. Battery Chargers
4. Home Appliances
5. Industrial Control Systems

Alternative Models

1. NCP1012AP065G
2. NCP1012P065G
3. NCP1012ST065T3
4. NCP1012ST100T3
5. NCP1012ST150T3

These alternative models offer similar functionality and can be used as replacements for the NCP1012ST130T3 in specific applications.

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