Offline Controllers | NCP1253

PWM コントローラ、電源モード、オフライン電源用

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Overview

NCP1253 は高集積 PWM コントローラで、頑丈で高性能のオフライン電源が小型の TSOP-6 パッケージで実現できます。電源範囲は最大 28 V、ピーク電流モード制御で動作するジッタード 65 kHz/100 kHz のスイッチング回路をホストします。セカンダリ・サイドの電力が下がり始めると、スイッチング周波数を最低レベルの 26 kHz まで自動的にフォールドバックします。電力がさらに下がると、スキップ・サイクルへ移行してピーク電流を制限します。CCM 動作でのサブ・ハーモニック発振を回避するために、電流センス信号に単純な抵抗を直列に含めることにより、調整可能なスロープ補償を利用できます。自動回復タイマベースの短絡保護に加えて、Vcc ピンの過電圧保護は、フォトカプラの破壊や逆開ループ動作の場合に回路全体を保護します。

  • Offline Adapters
  • AC-DC converters
  • Set-top Boxes
  • Printers
  • Notebooks and Netbooks
  • Frequency Foldback down to 26 kHz and Skip-Cycle in Light Load
  • Internal Ramp Compensation
  • Frequency Jittering in Normal and Frequency Foldback modes
  • Over Voltage Protection (OVP) monitoring on the Vcc pin
  • Timer-based Auto-Recovery or Latched Short-Circuit Protection

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fsw Typ (kHz)

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Reference Price

NCP1253ASN100T1G

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Obsolete

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

N

Flyback

Current Mode

100

Yes

8.8

Yes

Yes

Yes

28

300 / 500

Price N/A

More Details

NCP1253ASN65T1G

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Obsolete

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

N

Flyback

Current Mode

65

Yes

8.8

Yes

Yes

Yes

28

300 / 500

Price N/A

More Details

NCP1253BSN100T1G

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Active

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

Y

Flyback

Current Mode

100

Yes

8.8

Yes

No

Yes

28

300 / 500

$0.2036

More Details

NCP1253BSN65T1G

Loading...

Active

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

Y

Flyback

Current Mode

65

Yes

8.8

Yes

No

Yes

28

300 / 500

$0.1768

More Details

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