Offline Controllers | NCP1240G

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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概览

NCP1240 是新款固定频率电流模式控制器，动态自供电。在启动、瞬态、锁存、待机过程中，此功能会激活内部启动电流源，因而大大简化了辅助电源和 VCC 电容的设计。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。该高压结构还支持欠压检测。它采取基于计时器的故障检测，确保检测过载和可调补偿，以帮助保持最大功率，无论输入电压如何。由于频率折回，该控制器在轻负载条件下表现出良卓越的能效，同时保持极低的待机功耗。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。专用的离线模式通过让整个器件“休眠”，从而最大限度地降低控制电路的功耗，无负载功耗极低。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。就是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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CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Topology

Control Mode

fsw Typ (kHz)

Stand-by Mode

UVLO (V)

Short Circuit Protection

Latch

Soft Start

VCC Max (V)

Drive Cap. (mA)

Reference Price

NCP1240GD065R2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-7

751U

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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