Product overview
概要
The PM8803 integrates a Power over Ethernet (PoE) interface and a current mode PWM controller to simplify the design of the power supply sections of all powered devices. The PoE/PoE+ interface includes all functions required by the IEEE 802.3at as well as detection, classification, undervoltage lockout (UVLO) and inrush current limitation.
The PM8803 specifically performs IEEE802.3at Layer 1 hardware classification, providing the system with an indication of Type 2 PSE successful detection.
The PM8803 has been designed to work with power either from the Ethernet cable or from an external power source such as a wall adapter, ensuring the priority of the auxiliary source over the PoE. The DC-DC section of the PM8803 features a programmable oscillator frequency, an adjustable slope compensation, dual complementary low-side drivers, programmable dead time and an internal temperature sensor.
The PM8803 targets high-efficiency conversion under all load conditions supporting flyback, forward, forward with active clamp converters and synchronous rectification.
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All features
- IEEE 802.3at compliant PD interface
- Works with power supplied from Ethernet LAN cables or from local auxiliary sources
- Successful IEEE802.3at Layer1 classification indicator
- Integrated 100 V, 0.45 Ω, 1 A hot-swap MOSFET
- Accurate 140 mA typ. inrush current level
- Programmable classification current
- Programmable DC current limit up to 1 A
- Integrated high voltage start-up bias regulator
- Thermal shutdown protection
- Current mode pulse width modulator
- Programmable oscillator frequency
- 80% maximum duty cycle with internal slope compensation
- Support for flyback, forward, forward active clamp, flyback with synchronous rectification
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STMicroelectronics - PM8803
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHSコンプライアンスグレード | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| PM8803 | Active 交換品交換品 | HTSSOP20 | Industrial | Ecopack2 | - | - | |
| PM8803TR | Active 交換品交換品 | HTSSOP20 | Industrial | 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
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Sample & Buy
| Part Number | 製品ステータス | Budgetary Price (US$)*/Qty | STから購入 | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM8803TR | | | distributors 販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください | ||||||||||
| PM8803 | | | distributors 販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください |
PM8803TR Active
販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください
PM8803 Active
販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください
（*）概算用の参考価格（US$）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。