Overview
The NCP1342ANACED1R2G is a highly integrated quasi-resonant flyback controller produced by onsemi. This IC is designed for high-performance off-line power converters, particularly in applications where low parts count and cost effectiveness are crucial. It features an advanced current-mode architecture and includes several enhancements for optimized efficiency and reliability.
Key Specifications
| Specification | Value |
|---|---|
| Topology | Flyback |
| Mounting Type | Surface Mount |
| Package / Case | 10-SOP (0.154", 3.90mm Width), 9 Leads |
| Supplier Device Package | 9-SOIC |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Voltage - Supply (Vcc/Vdd) | 9V ~ 28V |
| Voltage - Start Up | 17 V |
| Output Isolation | Isolated |
| Internal Switch(s) | No |
| Control Features | EN, Frequency Control, Soft Start, Sync |
| Fault Protection | Current Limiting, Over Load, Over Power, Over Temperature, Over Voltage, Short Circuit |
Key Features
- Integrated High-Voltage Startup Circuit with Brownout Detection
- Integrated X2 Capacitor Discharge Capability
- Proprietary Valley-Lockout Circuitry for stable valley switching
- Rapid Frequency Foldback with Minimum Peak Current Modulation for low load performance
- Non-dissipative Over Power Protection (OPP) for constant maximum output power
- Latched Overvoltage and NTC-ready Overtemperature Protection
- Line Removal Detection for safe discharge of X2 capacitors
- Quiet-Skip Mode to manage power delivery and minimize acoustic noise
Applications
The NCP1342ANACED1R2G is ideal for various high-performance off-line power converter applications, including:
- AC-DC adapters
- Open-frame power supplies
- Other applications requiring low parts count and high efficiency
Q & A
- What is the topology of the NCP1342ANACED1R2G?
The topology is Flyback.
- What is the operating temperature range of the NCP1342ANACED1R2G?
The operating temperature range is -40°C to 125°C (TJ).
- What are the control features of the NCP1342ANACED1R2G?
The control features include EN, Frequency Control, Soft Start, and Sync.
- What types of fault protection does the NCP1342ANACED1R2G offer?
The IC offers Current Limiting, Over Load, Over Power, Over Temperature, Over Voltage, and Short Circuit protection.
- How does the NCP1342ANACED1R2G manage low load conditions?
The IC uses Rapid Frequency Foldback with Minimum Peak Current Modulation and Quiet-Skip Mode to manage low load conditions efficiently.
- What is the purpose of the integrated X2 capacitor discharge capability?
The integrated X2 capacitor discharge capability eliminates the need for power-consuming resistors across the X2 input capacitors, reducing standby power consumption.
- What is the voltage range for the VCC supply?
The VCC supply voltage range is from 9V to 28V.
- Does the NCP1342ANACED1R2G have internal switches?
No, the NCP1342ANACED1R2G does not have internal switches.
- What is the significance of the valley-lockout circuitry in the NCP1342ANACED1R2G?
The valley-lockout circuitry ensures stable valley switching, which helps in reducing switching losses.
- How does the NCP1342ANACED1R2G protect against overtemperature conditions?
The IC includes NTC-ready overtemperature protection through a dedicated pin.
