Overview
The NCP1340B3D1R2G is a highly integrated quasi-resonant flyback controller produced by ON Semiconductor. It is designed for high-performance off-line power converters and features an integrated active X2 capacitor discharge capability, enabling no-load power consumption below 30 mW. The controller incorporates a proprietary valley-lockout circuitry, ensuring stable valley switching and transitioning to frequency foldback mode to reduce switching losses at light loads. Additionally, it includes quiet-skip mode to manage power delivery while minimizing acoustic noise.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| High Voltage Startup Circuit Input Voltage | -0.3 to 700 | V |
| Supply Input Voltage | -0.3 to 30 | V |
| Supply Input Voltage Range (Operating) | 9 to 28 | V |
| Maximum Switching Frequency Clamp | Adjustable, up to 110 kHz | kHz |
| Operating Junction Temperature | -40 to 125 | °C |
| Maximum Junction Temperature | 150 | °C |
| Package Type | SOIC-9 | |
| Power Dissipation (TA = 25°C, 1 oz. Cu, 42 mm2 Copper Clad Printed Circuit) | 450 | mW |
Key Features
- Integrated High-Voltage Startup Circuit with Brownout Detection
- Integrated X2 Capacitor Discharge Capability
- Wide VCC Range from 9 V to 28 V
- 28 V VCC Overvoltage Protection
- Abnormal Overcurrent Fault Protection for Winding Short Circuit or Saturation Detection
- Internal Temperature Shutdown
- Valley Switching Operation with Valley-Lockout for Noise-Free Operation
- Frequency Foldback with 25 kHz Minimum Frequency Clamp for Increased Efficiency 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)
- Fixed or Adjustable Maximum Frequency Clamp
- Fault Pin for Severe Fault Conditions, NTC Compatible for OTP
Applications
The NCP1340B3D1R2G is suitable for a variety of high-performance off-line power converter applications, including but not limited to:
- Consumer Electronics Power Supplies
- Industrial Power Supplies
- Medical Devices
- Aerospace and Defense Systems
- Telecommunication Equipment
Q & A
- What is the primary function of the NCP1340B3D1R2G?
The NCP1340B3D1R2G is a quasi-resonant flyback controller designed for high-performance off-line power converters. - What is the no-load power consumption of the NCP1340B3D1R2G?
The no-load power consumption is below 30 mW. - What is the operating voltage range of the VCC pin?
The operating voltage range of the VCC pin is from 9 V to 28 V. - What protective features does the NCP1340B3D1R2G include?
The controller includes internal brownout detection, overvoltage protection, overcurrent fault protection, internal temperature shutdown, and line removal detection. - How does the valley-lockout circuitry work?
The valley-lockout circuitry ensures stable valley switching and transitions to frequency foldback mode to reduce switching losses at light loads. - What is the purpose of the quiet-skip mode?
The quiet-skip mode manages power delivery while minimizing acoustic noise at light loads. - Can the maximum switching frequency be adjusted?
Yes, the maximum switching frequency clamp is adjustable, up to 110 kHz. - What is the package type of the NCP1340B3D1R2G?
The package type is SOIC-9. - What is the maximum junction temperature of the NCP1340B3D1R2G?
The maximum junction temperature is 150°C. - How does the X2 capacitor discharge feature work?
The integrated active X2 capacitor discharge feature safely discharges the X2 capacitors when the AC line is removed, eliminating the need for power-consuming resistors.
