低功耗离线恒定电流 PWM 电流模式控制器

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概览

NCP1361 提供了一个新型方案,目的是在通用电源反激式应用中实现从几瓦到 20 W 的输出功率水平。由于采用新方法,该新型控制器不再需要用于恒定电流调节的辅助反馈电路,同时使用传统的光耦合器和 TL431 电压参考实现了出色的线路和负载调节。NCP1361 在高负载时以谷锁闭准谐振峰值电流控制模式运行,以提供高能效。当辅助侧功率开始消失时,该控制器将自动调节占空比,然后在更低负载下,该控制器通过谷开关检测,以固定峰值电流进入脉冲频率调制。这种技术允许在微小的虚拟负载下保持输出调节。前 4 个谷中的谷锁闭可防止谷跳跃运行,然后在更低负载下的谷开关可提供高能效。

  • AC-DC USB Charging
  • Cell Phones
  • Tablets
  • Portable Devices
  • No frequency clamp, 80 or 110 kHz Maximum Switching Frequency
  • Quasi-Resonant with Valley Switching Operation
  • Fixed Peak Current & Deep frequency foldback @ light load operation
  • Wide Operation VCC range (up to 28 V)
  • Cycle by Cycle peak current limit
  • CS & Vs/ZCD pin Short and Open Protection
  • Internal Temperature Shutdown
  • Constant Current Primary-side feedback eliminates secondary controller
  • ±10% Current Regulation
  • Clamped Gate-drive Output for Mosfet
  • Built-in soft-start
  • Low Start-up current ( 2 μA typ.)
  • Less than 30 mW No-Load Performance at High Line
  • These are Pb-Free Devices

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Reference Price

NCP1361AABAYSNT1G

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Active

CAD Model

Pb

A

H

P

TSOP-6

3

260

REEL

3000

Y

Flyback

Current Mode

Variable

Yes

6.5

Yes

Yes

Yes

28

2000 / 1000

$0.207

More Details

NCP1361BABAYSNT1G

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Active

CAD Model

Pb

A

H

P

TSOP-6

3

260

REEL

3000

Y

Flyback

Current Mode

Variable

Yes

6.5

Yes

No

Yes

28

2000 / 1000

$0.427

More Details

NCP1361EABAYSNT1G

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Active

CAD Model

Pb

A

H

P

TSOP-6

3

260

REEL

3000

Y

Flyback

Current Mode

Variable

Yes

6.5

Yes

No

Yes

28

2000 / 1000

$0.3598

More Details

NCP1361FABAYSNT1G

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Obsolete

CAD Model

Pb

A

H

P

TSOP-6

3

260

REEL

3000

N

Flyback

Current Mode

Variable

Yes

6.5

Yes

Yes

Yes

28

2000 / 1000

Price N/A

More Details

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