用于离线 SMPS 的高电压开关稳压器

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概览

NCP1129 提供了构建可靠紧凑的 AC-DC 开关电源所需的一切功能,且周边元件极少。使用 NCP1129 构建的转换器结合了雪崩额定电压为 650 V 的 MOSFET,可以针对国际条件进行安全设计,而不会危害总体可靠性。NCP1129 实施了峰值电流模式控制和可调斜坡补偿,可确保连续导通模式 (CCM) 运行下的稳定性。最大峰值电流可使用外部电阻调节,使得设计人员能够增加斜坡补偿来稳定 CCM 电源。短路故障条件从辅助绕组电压进行独立检测,因此可使用真正的过载检测改善短路保护。源引脚提供对于 MOSFET 源的访问,实现过功率补偿。该开关供电范围高达 26 V,还提供带抖动的 65 kHz 或 100 kHz 开关频率,在峰值电流模式控制下运行。当辅助侧功率开始降低时,该开关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限制。

  • Power Supply
  • Power supply for DVD, STB, CD-Player
  • Aux supply for TV, USB, Appliance
  • 650 V Avalanche Rated MOSFET
  • FixedFrequency 65 or 100 kHz CurrentMode Control Operation
  • Frequency Foldback Down to 26 kHz and SkipCycle in Light Load Conditions
  • Adjustable Current Limit
  • 50 ms Timer-Based Auto-Recovery Short-Circuit Protection
  • Frequency Jittering in Normal and Frequency Foldback Modes
  • Option for Auto-Recovery or Latched Short-Circuit Protection
  • Less than 100 mW Standby Power at High Line

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Reference Price

NCP1129AP100G

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Obsolete

CAD Model

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Current Mode

100

+/-5% of FSW

Yes

2

650

0

Yes

0

8.8

Yes

No

No

Yes

Price N/A

More Details

NCP1129AP65G

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Obsolete

CAD Model

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Current Mode

65

+/-5% of FSW

Yes

2

650

0

Yes

0

8.8

Yes

No

No

Yes

Price N/A

More Details

NCP1129BP100G

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Obsolete

CAD Model

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Current Mode

100

+/-5% of FSW

Yes

2

650

0

Yes

0

8.8

Yes

No

No

No

Price N/A

More Details

NCP1129BP65G

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Last Shipments

CAD Model

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Current Mode

65

+/-5% of FSW

Yes

2

650

0

Yes

0

8.8

Yes

No

No

No

Price N/A

More Details

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