Offline Controllers | NCP1239

フライバックコンバータ用固定周波数電流モード・コントローラ (HV スタートアップ対応)

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Overview

NCP1239 は、固定周波数電流モード・コントローラで、ダイナミック自己給電が特長です。この機能により、補助電源や Vcc キャパシタの設計が大幅にシンプル化します。スタートアップ、遷移、ラッチ、スタンバイなどのときに、内部スタートアップ電流源をアクティブ化して、コントローラへ供給します。 電源範囲は最大 35 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するので、軽負荷状態での優れた効率が保証されます。 タイマベースの故障検知で、過負荷を確実に検知します。補償が調整可能なので、入力電圧から独立して、最大電力を保持できます。

  • Auxiliary Power
  • Industrial Power

  • AC/DC Power Adapters
  • Set-top Box

  • Fixed-frequency 65-kHz or 100-kHz current-mode control operation
  • Frequency foldback down to 26 kHz and skip mode
  • Adjustable Over Power Protection (OPP) circuit
  • High-voltage Current Source with Brown-out (BO) detection
  • Internal ramp compensation
  • Internal fixed 8-ms soft-start
  • Frequency jittering in normal and frequency foldback modes
  • 64-ms timer-based short-circuit protection with auto-recovery or latched operation
  • Pre-short ready
  • Latched OVP on Vcc (NCP1239 A & B versions)
  • Latched OVP/OTP input for improved robustness
  • 35-V Vcc operation
  • +500 mA/ -500 mA peak source/sink drive capability
  • Internal thermal shutdown
  • Extremely low no-load standby power
  • Pin-to-pin compatible with the existing NCP1236/1247 series

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Package Type

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fsw Typ (kHz)

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UVLO (V)

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Latch

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NCP1239AD100R2G

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NCP1239AD65R2G

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NCP1239BD100R2G

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NCP1239BD65R2G

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NCP1239CD65R2G

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NCP1239DD100R2G

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NCP1239DD65R2G

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NCP1239ED100R2G

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NCP1239ED65R2G

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NCP1239FD65R2G

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NCP1239GD100R2G

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NCP1239HD65R2G

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NCP1239ID65R2G

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NCP1239JD65R2G

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NCP1239KD65R2G

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NCP1239LD100R2G

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NCP1239LD65R2G

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NCP1239MD65R2G

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NCP1239ND65R2G

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NCP1239PD65R2G

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NCP1239QD65R2G

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NCP1239RD65R2G

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信頼性データ

Die Related Summary Data

Device: NCP1239AD65R2G

Equivalent to wafer fab process: VHVIC

製品技術

製品技術

等価デバイス時間

MTBF/MTTF (時間)

FITS

VHVIC

2

2577173853

More Details

Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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