Overview
The onsemi NCP1271D65R2G is a Soft-Skip Mode Standby PWM Controller designed for high-efficiency and ruggedness in power conversion applications. This controller is part of the NCP1271 series, which is pin-to-pin compatible with the existing NCP120X series. It features adjustable Soft-Skip mode, internal high-voltage startup FET, and timer-based fault detection, making it an excellent choice for converters where component cost and ruggedness are critical. The NCP1271D65R2G is particularly suited for applications requiring low standby power consumption and reduced acoustic noise.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Current - Max | 3.5 mA |
| Supply Voltage | 20 V |
| Frequency - Max | 65 kHz |
| Topology | Flyback |
| Duty Cycle - Min | 75% |
| Duty Cycle - Max | 85% |
| Operating Temperature Range | -40°C to +150°C |
| Storage Temperature Range | -60°C to +150°C |
| Thermal Resistance | 177°C/W |
| Package Style | SOIC-7 |
| Mounting Method | Surface Mount |
| Peak Current Drive Capability | +500 mA / -800 mA |
Key Features
- Fixed-Frequency Current-Mode Operation with Ramp Compensation and Skip Cycle in Standby Condition
- Timer-Based Fault Protection for Improved Overload Detection
- 'Soft-Skip Mode' Technique for Optimal Noise Control in Standby
- Internal High-Voltage Startup Current Source for Lossless Startup
- ±5% Current Limit Accuracy over the Full Temperature Range
- Adjustable Skip Level
- Internal Latch for Easy Implementation of Overvoltage and Overtemperature Protection
- Frequency Jittering for Softened EMI Signature
- Sub-100 mW Standby Power can be Achieved
- Pin-to-Pin Compatible with the Existing NCP120X Series
- Pb-Free Device
Applications
- AC-DC Adapters for Notebooks, LCD Monitors
- Offline Battery Chargers
- Consumer Electronic Appliances (STB, DVD, DVDR)
Q & A
- What is the maximum supply voltage of the NCP1271D65R2G?
The maximum supply voltage is 20 V.
- What is the operating temperature range of the NCP1271D65R2G?
The operating temperature range is -40°C to +150°C.
- What topology does the NCP1271D65R2G support?
The NCP1271D65R2G supports flyback topology.
- What is the maximum duty cycle of the NCP1271D65R2G?
The maximum duty cycle is 85%.
- Does the NCP1271D65R2G have internal frequency jittering?
Yes, it does have internal frequency jittering for a softened EMI signature.
- What is the peak current drive capability of the NCP1271D65R2G?
The peak current drive capability is +500 mA / -800 mA.
- Is the NCP1271D65R2G Pb-free?
Yes, it is a Pb-free device.
- What is the package style of the NCP1271D65R2G?
The package style is SOIC-7.
- What are some common applications of the NCP1271D65R2G?
Common applications include AC-DC adapters for notebooks and LCD monitors, offline battery chargers, and consumer electronic appliances.
- Does the NCP1271D65R2G support adjustable skip level?
Yes, it supports an adjustable skip level.
