Secondary Side Controllers | NCP4353

辅助侧睡眠模式控制器，用于低待机功率适配器

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概览

NCP4353 和 NCP4354 是辅助侧 SMPS 控制器，用于需要极低无负载功耗的应用。此器件能够检测无负载条件，并让电源进入低功耗关闭模式。在关闭模式下，关闭初级侧控制器，能量由输出电容提供，因此消除了保持调节所需的功耗。在关闭模式下，输出电压松弛，可降至可调电平。需要更多能量时，NCP4353 或 NCP4354 会自动重新启动初级侧控制器。在正常供电中，这些器件提供集成式电压反馈调节，无需分路稳压器。除电压调节外，A 版本还包含一个电流调节回路。一个光耦合器即可提供反馈控制和 ONOFF 信号。NCP4354 包括一个使用 1 kHz 方形波驱动的开路 MOSFET 实施的 LED 驱动器引脚，以 12.5% 占空比运行，以用于指示。NCP4354 采用 SOIC-8 封装，NCP4353 采用 TSOP-6 封装。

  • Supply Current <100 uA
  • Constant current and constant voltage regulation (A version)
  • +-1% reference voltage accuracy over temperature

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MSL Temp (°C)

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VCC Max (V)

Vref Typ (V)

ICC Max (A)

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Reference Price

NCP4353ASNT1G

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Obsolete

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

N

36

1.25

1.5E-4

0

125

Price N/A

More Details

NCP4353BSNT1G

Contact Sales

Obsolete

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

N

36

1.25

1.5E-4

0

125

Price N/A

More Details

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