Offline Controllers | NCP1255

PWM 控制器，电流模式，用于离线电源，具有峰值功率偏移

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概览

NCP1255 是一款高度集成的 PWM 控制器，能够在 SOIC-8 封装内提供耐用的高性能离线电源。该控制器供电范围高达 35 V，具有带抖动的 65 kHz 开关电路，在峰值电流模式控制下运行。当辅助侧功率开始降低时，该控制器将其开关频率自动折回至最低 26 kHz 的水平。当功率进一步下降时，该零部件进入跳过周期，同时对峰值电流进行固定。为了帮助构建耐用的转换器，该控制器具有若干重要保护特性：内部欠电压，与输入电压无关的恒定最大输出电流的无耗散超功率保护，通过专用引脚或 Vcc 输入实现的两个锁存过电压保护输入 0，最后还包括外部可调节自动恢复计时器持续时间。该控制器结构布置可在峰值电流达到限值时，授权瞬变峰值功率偏移。此时，开关频率从 65 kHz 增加到 130 kHz，直到峰值要求消失。然后，当转换器穿越峰值功率偏移模式（长）或经历短路（短）时，计时器持续时间进行调制。

  • Ac-Dc Adapters
  • Notebook Adapters
  • Printer Power Supplies
  • 65kHz operating frequency with 130kHz Frequency Excursion
  • Internal and Adjustable Over Power Protection (OPP) Circuit
  • Adjustable Brown-Out Protection
  • Frequency Foldback down to 26 kHz and Skip-cycle in light load conditions
  • Adjustable Timer-based Auto-recovery Overload/Short-circuit protection with 100% to 25% timer reduction for short-circuit faults
  • Frequency Jittering in Normal and Frequency Foldback Modes
  • Latch Input
  • Double Vcc hiccup in fault mode

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Package Type

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MSL Type

MSL Temp (°C)

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Container Qty.

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Control Mode

fsw Typ (kHz)

Stand-by Mode

UVLO (V)

Short Circuit Protection

Latch

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Reference Price

NCP1255AD65R2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

65

Yes

8.8

Yes

Yes

Yes

35

300 / 500

Price N/A

More Details

NCP1255BD65R2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

65

Yes

8.8

Yes

Yes

Yes

35

300 / 500

Price N/A

More Details

NCP1255CD65R2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

65

Yes

8.8

Yes

Yes

Yes

35

300 / 500

Price N/A

More Details

NCP1255DD65R2G

Loading...

Obsolete

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

65

Yes

8.8

Yes

Yes

Yes

35

300 / 500

Price N/A

More Details

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