製品概要
概要
This reference design represents a 12 V, 8 A converter solution ideal for various applications including building safety and security or surveillance, with a PoE-PD interface and a DC-DC active clamp forward converter. The PoE-PD interface is based on the PM8805 system in package device with two active bridges and an IEEE 802.3bt compliant Powered Device (PD) interface. It can be used in all medium-to-high power 2P and 4P high efficiency PoE and PoE+ applications.
The DC-DC active clamp forward converter is designed around the PM8804 PWM controller, which is an integrated solution for smart and efficient 48 V converters, featuring a programmable oscillator for the switching frequency, adjustable slope compensation, dual complementary low-side drivers with programmable dead time, programmable soft start, soft turn off and a programmable current sense blanking time.
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特徴
- Features of the PM8805 PoE-PD interface:
- System in package integrating a double active bridge, a hot-swap MOSFET and a PoE-PD
- Supports legacy high power, 4-pair applications
- 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge
- Identifies which kind of PSE (standard or legacy) is connected to, and provides successful IEEE802.3 af /at /bt classification indication as combination of the T0, T1 and T2 signals (open drain)
- Smart operational mode selection through the STBY, FAUX and RAUX control signals
- QFN 56 8x8mm package with 43 pins and 6 exposed pads
- Features of the PM8804 PWM controller:
- PWM peak current mode controller
- Input operating voltage up to 75 V
- Internal high voltage start up regulator with 20 mA capability
- Programmable fixed frequency up to 1 Mhz
- Soft start up with adjustable time
- Soft turn off (optionally disabled)
- Dual 1 APK, low side complementary gate drivers
- GATE2 optionally turned off for reduced consumption
- 80% maximum duty cycle with internal slope compensation
- QFN 16 3x3mm package with exposed pad
- Features of the PM8805 PoE-PD interface:
推奨コンテンツ
すべてのリソース
| Resource title | バージョン | Latest update |
|---|
Board Manufacturing Specifications (1)
| Resource title | バージョン | Latest update | ||
|---|---|---|---|---|
| ZIP | 1.0 | 11 Oct 2018 |
11 Oct 2018
|
BOM (1)
| Resource title | バージョン | Latest update | ||
|---|---|---|---|---|
| 1.0 | 11 Oct 2018 |
11 Oct 2018
|
Schematic Pack (1)
| Resource title | バージョン | Latest update | ||
|---|---|---|---|---|
| 1.0 | 11 Oct 2018 |
11 Oct 2018
|
品質 & 信頼性
| 製品型番 | マーケティング･ステータス | パッケージ | グレード | RoHSコンプライアンスグレード | WEEE Compliant | 材料宣誓書** |
|---|---|---|---|---|---|---|
| STEVAL-POE005V1 |
量産中
|
CARD | インダストリアル | Ecopack2 | はい |
|
STEVAL-POE005V1
Package:
CARDMaterial Declaration**:
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サンプル & 購入
| 製品型番 | 販売代理店から購入 | STから購入 | コア製品 | 製品ステータス | サプライヤ | ECCN (US) | ECCN (EU) | Country of Origin | Board production status | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-POE005V1 | 4 distributors | Buy Direct | PM8804, PM8805 |
量産中
|
ST | EAR99 | NEC | ITALY | - |
（*）概算用の参考価格（US$）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。
