Overview
The NCP1342AMDCCDR2G is a highly integrated quasi-resonant flyback controller produced by onsemi, designed for high-performance off-line power converters. This component is particularly suited for applications requiring low no-load power consumption, high efficiency, and robust protective features. The NCP1342 features an integrated active X2 capacitor discharge capability, enabling no-load power consumption below 30 mW. It also includes proprietary valley-lockout circuitry for stable valley switching and transitions to frequency foldback mode to reduce switching losses at light loads.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Temperature | -40 | 125 | °C | |
| Supply Input Voltage (VCC) | 9 | 12 | 28 | V |
| High Voltage Startup Circuit Input Voltage (VHV) | -0.3 | 700 | V | |
| Driver Maximum Current (IDRV) | 500 (source) | 800 (sink) | mA | |
| Maximum Junction Temperature | 150 | °C | ||
| Power Dissipation (SOIC-8, TA = 25°C) | 450 | mW | ||
| Thermal Resistance (SOIC-8, TA = 25°C) | 225 | °C/W | ||
| Switching Frequency (Typical) | Variable | kHz | ||
| UVLO (Under Voltage Lockout) | 9 | V |
Key Features
- Integrated High-Voltage Startup Circuit with Brownout Detection
- Integrated X2 Capacitor Discharge Capability
- Valley Switching Operation with Valley-Lockout for Noise-Free Operation
- Frequency Foldback with 25 kHz Minimum Frequency Clamp for Increased Efficiency at Light Loads
- Rapid Frequency Foldback for Fast Reduction of Switching Frequency at Light Loads
- Skip Mode with Quiet-Skip Technology for Highest Performance During Light Loads
- Minimized Current Consumption for No Load Power Below 30 mW
- Frequency Jittering for Reduced EMI Signature
- Latching or Auto-Recovery Timer-Based Overload Protection
- Adjustable Overpower Protection (OPP)
- NTC Compatible Fault Pin for Overtemperature Protection
- High Drive Capability: -500 mA / +800 mA
Applications
- Medium or High Power AC-DC Adapters
- Ultra High Density AC-DC Adapters
- USB PD Compliant Adapters
- Notebook Adapters
- Flat TV SMPS
- Computer Power Supplies
- Phone and Tablet Adapters
Q & A
- What is the NCP1342AMDCCDR2G used for?
The NCP1342AMDCCDR2G is used for designing high-performance off-line power converters, particularly in applications requiring low no-load power consumption and high efficiency.
- What is the operating temperature range of the NCP1342AMDCCDR2G?
The operating temperature range is -40°C to 125°C.
- What is the typical supply input voltage range for the NCP1342AMDCCDR2G?
The typical supply input voltage range is 9 V to 28 V.
- What protective features does the NCP1342AMDCCDR2G include?
The NCP1342AMDCCDR2G includes internal brownout detection, non-dissipative Over Power Protection (OPP), latched overvoltage protection, NTC-ready overtemperature protection, and line removal detection.
- How does the NCP1342AMDCCDR2G manage power delivery at light loads?
The NCP1342AMDCCDR2G uses Rapid Frequency Foldback with Minimum Peak Current Modulation and quiet-skip mode to manage power delivery while minimizing acoustic noise at light loads.
- What is the maximum driver current of the NCP1342AMDCCDR2G?
The maximum driver current is -500 mA (source) and +800 mA (sink).
- What is the purpose of the integrated X2 capacitor discharge capability?
The integrated X2 capacitor discharge capability ensures that the X2 capacitors are safely discharged when the AC line is removed, reducing no-load power consumption.
- Does the NCP1342AMDCCDR2G support frequency jittering?
Yes, the NCP1342AMDCCDR2G includes frequency jittering to reduce the EMI signature.
- What are the common applications of the NCP1342AMDCCDR2G?
Common applications include medium or high power AC-DC adapters, ultra high density AC-DC adapters, USB PD compliant adapters, notebook adapters, flat TV SMPS, computer power supplies, and phone and tablet adapters.
- What is the maximum junction temperature of the NCP1342AMDCCDR2G?
The maximum junction temperature is 150°C.
