Overview
The NCP1340B8D1R2G is a highly integrated quasi-resonant flyback controller designed by ON Semiconductor. This component is suitable for designing high-performance off-line power converters, particularly in applications requiring efficient and reliable power management. The NCP1340 features advanced technologies such as valley-lockout switching, frequency foldback, and quiet-skip mode to minimize acoustic noise and optimize efficiency across various load conditions. It also includes several protective features, such as internal brownout detection, overvoltage protection, and overtemperature protection, ensuring the ruggedness and reliability of the converter.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| High Voltage Startup Circuit Input Voltage | VHV(MAX) | -0.3 | 700 | V | |
| Supply Input Voltage | VCC(MAX) | -0.3 | 30 | V | |
| Supply Input Current | ICC(MAX) | 30 | mA | ||
| Operating Junction Temperature | TJ | -40 | 125 | °C | |
| Maximum Junction Temperature | TJ(MAX) | 150 | °C | ||
| Storage Temperature Range | TSTG | -60 | 150 | °C | |
| Minimum Operating Voltage | VCC(on) | 9 | V | ||
| VCC Overvoltage Protection Threshold | VCC(OVP) | 27 | 28 | 29 | V |
| Brownout Start/Stop Levels | VHV increasing/decreasing | 90/80 | 107/93 | 116/98 | V |
| Maximum Frequency Clamp | 110 kHz | kHz |
Key Features
- Integrated High-Voltage Startup Circuit with Brownout Detection: Ensures low standby power consumption and protects against low input voltage conditions.
- Integrated X2 Capacitor Discharge Capability: Automatically discharges X2 capacitors when the AC line is removed, complying with IEC60950 standards.
- Valley Switching Operation with Valley-Lockout: Provides noise-free operation and stable valley switching down to the 6th valley.
- Frequency Foldback and Quiet-Skip Mode: Reduces switching losses and minimizes acoustic noise during light loads.
- Non-Dissipative Over Power Protection (OPP): Maintains constant maximum output power regardless of input voltage.
- Internal Temperature Shutdown and NTC-Ready Overtemperature Protection: Ensures thermal protection using a dedicated pin compatible with NTC thermistors.
- Abnormal Overcurrent Fault Protection: Detects winding short circuits or saturation and provides overload protection.
- Adjustable Overpower Protection (OPP) and Maximum Frequency Clamp: Allows for customizable protection and frequency control.
- Frequency Jittering for Reduced EMI Signature: Minimizes electromagnetic interference.
- Latching or Auto-Recovery Timer-Based Overload Protection: Provides flexible fault handling options.
Applications
The NCP1340B8D1R2G is suitable for a wide range of high-performance off-line power converter applications, including:
- Consumer electronics power supplies
- Industrial power supplies
- LED lighting power supplies
- Telecom and datacom power supplies
- Medical device power supplies
Its advanced features and robust protection mechanisms make it an ideal choice for applications requiring high efficiency, low standby power, and reliable operation.
Q & A
- What is the primary function of the NCP1340B8D1R2G?
The NCP1340B8D1R2G is a quasi-resonant flyback controller designed for high-performance off-line power converters.
- What is the operating voltage range of the NCP1340B8D1R2G?
The operating voltage range is from 9 V to 28 V.
- How does the NCP1340B8D1R2G manage X2 capacitor discharge?
The NCP1340B8D1R2G includes an integrated X2 capacitor discharge feature that automatically discharges the capacitors when the AC line is removed.
- What protective features does the NCP1340B8D1R2G offer?
The NCP1340B8D1R2G offers internal brownout detection, overvoltage protection, overtemperature protection, and abnormal overcurrent fault protection.
- How does the valley-lockout circuitry work?
The valley-lockout circuitry ensures stable valley switching down to the 6th valley and transitions to frequency foldback mode to reduce switching losses.
- What is the purpose of the quiet-skip mode?
The quiet-skip mode minimizes acoustic noise during light loads by managing power delivery efficiently.
- Can the NCP1340B8D1R2G be used in high-temperature environments?
Yes, the NCP1340B8D1R2G has an operating junction temperature range of -40°C to 125°C and includes internal temperature shutdown and NTC-ready overtemperature protection.
- How does the NCP1340B8D1R2G reduce EMI?
The NCP1340B8D1R2G uses frequency jittering to reduce the electromagnetic interference (EMI) signature.
- What are the package options for the NCP1340B8D1R2G?
The NCP1340B8D1R2G is available in SOIC-9 packages.
- Where can I find detailed ordering and shipping information for the NCP1340B8D1R2G?
Detailed ordering and shipping information can be found in the data sheet, specifically on page 3.
