控制器,固定频率,电流模式,双路 OCP,用于反激转换器

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NCP1240 是一款新型固定频率电流模式控制器,具有动态自供电功能。此功能可激活内部启动电流源使其在启动期间、瞬变、锁存、待机等期间为控制器供电,大大简化了辅助电源和 VCC 电容器的设计。此器件包含一个特殊的高压检测器,会检测从交流线路上拔下的应用,然后触发 X2 放电电流。该高电压结构还支持欠压检测。它具有基于计时器的故障检测可确保过载检测,还具有可调节补偿,有助于保持最大功率,而无论输入电压如何。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。内部频率抖动、斜坡补偿和多功能锁存输入使得此控制器成为强大电源设计的绝佳备选。专门的关断模式可通过将整个器件置于“睡眠”达到极低的无负载输入功耗,因此最大程度降低控制电路的功耗。NCP1240 采取双级过流保护,有别于其他有源 X2 放电和高压启动的固定频率反激控制器。对于某些应用(如电源有限),控制器在检测到第一级过载时必须保持调节。这就允许瞬态峰值功率高于最大连续输出功率。此产品符合 IEC60950 标准。请参阅下面符合性报告部分中的测试报告和认证。

  • AC-DC Adapters
  • Notebook Computers
  • Frequency foldback and skip mode
  • Timer-based overload protection with latched (A version) or auto-recovery (B version) operation
  • High-voltage startup with dynamic self supply
  • Integrated brown-out detection
  • Frequency Modulation
  • Adjustable overpower protection
  • Timer based Dual-Level Overcurrent protection

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NCP1240AD065R2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-7

1

260

REEL

2500

N

Flyback

Current Mode

65

Yes

9.3

Yes

Yes

Yes

28

500 / 800

Price N/A

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NCP1240AD100R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

1

260

REEL

2500

Y

Flyback

Current Mode

100

Yes

9.3

Yes

Yes

Yes

28

500 / 800

$0.5227

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NCP1240ED065R2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-7

1

260

REEL

2500

N

Flyback

Current Mode

65

Yes

9.3

Yes

Yes

Yes

28

500 / 800

Price N/A

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NCP1240FD065R2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-7

1

260

REEL

2500

N

Flyback

Current Mode

65

Yes

9.3

Yes

Yes

Yes

28

500 / 800

Price N/A

More Details

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