製品概要
概要
The SRK1001 controller is designed for secondary side synchronous rectification (SR) in flyback converters, suitable for operation in QR and mixed CCM/DCM fixed frequency circuits. It provides a high-current gate-drive output capable of driving N-channel Power MOSFETs.The control scheme of this IC is such that the SR MOSFET is switched on as soon as current starts flowing through its body diode, and then switched off as current approaches zero.
The fast turn-on with minimum delay and innovative adaptive turn-off logic allow maximizing the conduction time of the SR MOSFET and eliminating the effect of parasitic inductance in the circuit.
The device enters low consumption mode when it detects primary controller burst-mode operation, or when the DIS pin is pulled up by the user, or when the SR MOSFET conduction falls below the programmed minimum TON. This improves the converter efficiency at light load, where synchronous rectification is no longer beneficial.
After the converter restarts switching or the DIS pin goes low again and the IC detects that the current conduction in the rectifiers has increased 20% above the min TON programmed value, the IC exits low consumption mode and resumes switching operation.
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特徴
- Secondary side synchronous rectification controller optimized for flyback converter
- Suitable for QR and mixed CCM/DCM fixed frequency operation
- Wide VCC operating voltage range 3.7 to 32 V
- CC regulation operation down to 2V output supported
- Very low quiescent current in low consumption mode (170 µA)
- High-voltage sensing input for SR MOSFET drain-source voltage (185 V AMR)
- Operating frequency up to 300 kHz
- High-current gate-drive output for N-MOSFET
- Fast turn-on with minimum delay time and adaptive turn-off logic
- Programmable minimum TON and TOFF
- Low consumption mode entry by DIS pin, by primary side burst-mode detection or by detection of SR MOSFET conduction lower than programmed min. TON
- SO8 package
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製品スペック (1)
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| 19 Dec 2019 | 19 Dec 2019 |
アプリケーションノート (2)
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| 19 Mar 2021 | 19 Mar 2021 | |||
| 16 Dec 2019 | 16 Dec 2019 |
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| 20 Dec 2019 | 20 Dec 2019 |
プレゼンテーション (1)
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| 02 Oct 2015 | 02 Oct 2015 |
パンフレット (1)
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| 11 May 2021 | 11 May 2021 |
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STMicroelectronics - SRK1001
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品質 & 信頼性
| 製品型番 | Marketing Status | パッケージ | グレード | RoHSコンプライアンスグレード | 材料宣誓書** |
|---|---|---|---|---|---|
| SRK1001 | 量産中 | SO-8 | インダストリアル | Ecopack2 | |
| SRK1001TR | 量産中 | SO-8 | インダストリアル | Ecopack2 |
(**) st.comで提供している材料宣誓書は、パッケージ･ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください
サンプル & 購入
| 製品型番 | 販売代理店から購入 | STから購入 | 製品ステータス | ECCN (US) | ECCN (EU) | 梱包タイプ | パッケージ | 温度（℃） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小 | 最大 | |||||||||||
| SRK1001TR | 4 distributors | Buy Direct | 量産中 | EAR99 | NEC | Tape And Reel | SO-8 | - | - | CHINA | 0.363 / 1k | |
| SRK1001 | 1 distributors | Buy Direct | 量産中 | EAR99 | NEC | Tube | SO-8 | - | - | CHINA | 0.363 / 1k | |
（*）概算用の希望小売単価（US$）です。現地通貨でのお見積りについては、STのセールス･オフィスまたは販売代理店までお問い合わせください。
