NCP1288: Fixed Frequency Current Mode PWM Controller
The NCP1288 is a new generation of the NCP12xx fixed-frequency current-mode controllers featuring a high-voltage start-up current source, pin to pin compatible with the previous generation. Due to its proprietary Soft-Skip™ mode combined with frequency foldback, the controller exhibits excellent efficiency in light load condition while still achieving very low standby power consumption. This Soft-Skip feature also dramatically reduces the risk of acoustic noise, which enables the use of inexpensive transformers and capacitors in the clamping network. Internal frequency jittering, ramp compensation, and a versatile latch input make this controller an excellent candidate for converters where ruggedness and components cost are the key constraints. In addition, the controller includes a new high voltage circuitry that combines a startup current source and a brown-out / line OVP detector able to sense the input voltage either from the rectified ac line or the dc filtered bulk voltage. Finally, due to a careful design, the precision of critical parameters is well controlled over the entire temperature range (-40°C to +125°C), enabling easier design and increased safety (e.g. ±5% for the peak current limit, ±7% for the oscillator).
技术特性
- Timer−Based Overload Protections with Auto− Recovery (Option B) or Latched (Option A) Operation
- High−Voltage Current Source with Built−in Brown−out and Line Overvoltage Protections
• Fixed−Frequency Current−Mode Operation with Built−in Ramp Compensation
- Frequency Jittering for a Reduced EMI Signature
- Adjustable Overpower Compensation
- Latch−off Input for Severe Fault Conditions, with Direct Connection of an NTC for Overtemperature Protection (OTP)
- Protection Against Winding Short−Circuit
- Frequency Foldback transitioning into Soft−Skip for Improved Performance in Standby
- 65 kHz Oscillator (100 kHz and 133 kHz Versions Available Upon Request)
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应用
- Ac-dc Adapters for Notebooks, LCD, and Printers
- Offline Battery Chargers
- Consumer Electronic Power Supplies
- Auxiliary/Housekeeping Power Supplies
终端产品
- Overload protection independent of the auxiliary voltage
- Reduced EMI Signature
- Improved Performance in Standby
封装图 PACKAGE DIMENSIONS
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订购信息 Ordering Information
| 产品 |
状况 |
Compliance |
具体说明 |
封装 |
MSL* |
容器 |
预算价格 (1千个数量的单价） |
| 类型 |
外形 |
类型 |
数量 |
| NCP1288BD65R2G |
Active |
|
Fixed Frequency Current Mode PWM Controller |
SOIC-8 |
751U |
1 |
Tape and Reel |
2500 |
$0.6667 |
数据资料DataSheet下载
