控制器,准谐振电流模式

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NCP1380 是一款高性能器件,旨在为准谐振转换器供电。该控制器基于专属的谷锁闭系统,可以在功率负载变轻时进行切换并降低开关频率。这样将产生稳定的运行,即使在漏极-源极谷中总是触发的开关事件下也是如此。此系统可在低至第 4 个谷的条件下运行,并在之后切换到变频模式,确保卓越的待机功率性能。为了提高过载条件下的安全性,该控制器包括了过功率保护 (OPP) 电路,可对高电平线路处提供的电源进行箝制。具有安全功能的固定内部计时器依赖反馈电压来检测故障。一旦计时器到期,控制器则停止并保持选项 A 和 C 的锁存状态,或者进入选项 B 和 D 的自动恢复模式。该控制器尤其适用于适配器应用,有一个引脚来实施过电压/高温组合保护(版本 A 和 B)或 欠电压/过电压组合保护(版本 C 和 D)。

  • AC-DC adapters for notebooks
  • Offline battery chargers
  • Auxiliary power supplies (flat TV, appliances)
  • Power AC-DC converters for adapters, TVs and set top boxes
  • Quasi-resonant peak current mode control operation
  • Valley switching operation with valley lockout
  • Frequency foldback at light load
  • Adjustable overpower protection
  • Auto-recovery or latched internal output short circuit protection
  • Fixed internal 80 ms timer for short circuit protection
  • Combined overvoltage and overtemperature protection (A and B versions)
  • Combined overvoltage protection and brownout (C and D versions)
  • VCC range operation up to 28 V

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CAD Models

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fsw Typ (kHz)

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Reference Price

NCP1380ADR2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

9

Yes

Yes

Yes

28

500 / 800

Price N/A

More Details

NCP1380BDR2G

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Active

CAD Model

Pb

A

H

P

SOIC-8

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

28

500 / 800

$0.4237

More Details

NCP1380CDR2G

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Active

CAD Model

Pb

A

H

P

SOIC-8

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

Yes

Yes

28

500 / 800

$0.4835

More Details

NCP1380DDR2G

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Active

CAD Model

Pb

A

H

P

SOIC-8

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

28

500 / 800

$0.4237

More Details

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