NCP1236 是一款新型固定频率电流模式控制器，具有动态自供电 (DSS) 功能。此器件与之前的 NCP12xx 系列可实现引脚兼容。DSS 功能可激活内部启动电流源使其在瞬变期间为控制器供电，大大简化了辅助电源和 VCC 电容器的设计。由于频率折回，该控制器在轻型负载条件下具有绝佳的能效，同时还能达到极低的待机功耗。凭借内部频率抖动、斜坡补偿和多功能锁存输入，此控制器非常适合那些将部件成本作为关键限制因素的转换器。另外，该控制器还包括一个新型高电压电路，组合了启动电流源和欠电压检测器，能够感应来自整流交流线路或直流滤波大电压的输入电压。该高电压感应电路还用于过功率保护目的。过功率保护、超载保护和其他保护功能提高了最终应用的安全性和可靠性。
| 特性 | | 优势 |
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- Frequency Foldback then Skip Mode in light load and standby conditions
| | - High efficiency in light and no load conditions
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- High voltage current source with brown-out detection and dynamic self-supply
| | - Directly powered from the high voltage rail with integrated brown-out sensing to detect low input voltage.
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| | - Helps pass EMI requirements by spreading out the energy content of frequency peaks
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| | - Minimizes the stress on power components
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- Adjustable Overpower Compensation
| | - Monitors the input voltage to limit the amount of power being delivered by the converter
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- Latched / Autorecovery Timer-Based Overload Protection
| | - Protects against overcurrent
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| 应用 | | 终端产品 |
|---|
- AC-DC Adapters
- Consumer Electronics Power Supplies
- Auxiliary/Housekeeping power supplies
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