控制器,准谐振,电流模式,低待机耗量,带 PFC 关断

Obsolete

概览

NCP1382 采用 SO-14 封装,包括构建坚固高能效的准谐振 (QR) 开关电源所需的一切功能。通过前端功率因数修正电路供电时,NCP1382 会在低输出负载条件下自动断开 PFC 控制器(带可调节级),因此改善了待机功耗性能。这尤其适用于中高功率离线应用,如笔记本电脑适配器。当电流设置点降至某个给定值以下,如输出功率需求消失时,该集成电路将进入所谓的跳过周期模式,在轻负载下提供卓越能效。因为发生此情况时具有可调节低峰值电流和专属的软跳过技术,所以不会产生噪声。跳过周期还能够轻松选择发生折回和待机的最大开关频率。NCP1382 还具有若干有效保护选项,如 a) 独立于辅助电压的短路过载检测,b) 自动恢复欠电压检测,和 c) 发生过电压保护或超温保护时的外部锁存电路输入。NCP1381 与NCP1382: 跳过调节引脚上的锁存关断电平: NCP1381 3.5 V(典型值)NCP1382 2.5 V(典型值)

  • Power Supplies > 75 W

  • High Power AC/DC Adaptors for Notebook, etc.
  • Offline Battery Chargers
  • Set-Top Boxes Power Supplies,TV Monitors, etc.

  • Current-Mode Quasi-Resonant Operation
  • Adjustable Line Over Power Protection
  • Extremly Low Startup Current of 15 uA Maximum
  • Soft-Skip Cycle Capability at Adjustable Peak Currents
  • Plateau Sensing Overvoltage
  • Brown-out Protection
  • Maximum TON Limitation
  • Overpower Protection by Current Sense Offset
  • Internal 5ms Soft-Start Management
  • Short-Circuit Protection Independent of Auxiliary Level
  • External Latch Input Pin for an OTP Signal
  • Go-To-Standby Signal for the PFC Front Stage
  • True Frequency (TON + TOFF) Clamp Circuit
  • Low and Noiseless, No-Load Standby Power
  • Internal Leading Edge Blanking
  • +500 mA/-800 mA Peak Current Drive Capability
  • 5 V/10 mA Reference Voltage

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CAD Models

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Package Type

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MSL Temp (°C)

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ON Target

Topology

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fsw Typ (kHz)

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UVLO (V)

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NCP1382DR2G

Obsolete

CAD Model

Pb

A

H

P

SOIC-14

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

Yes

Yes

Yes

Yes

20

500 / 800

Price N/A

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