-
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.主な特徴
- 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:
サンプル & 購入
| 製品型番 | コア製品 | 製品ステータス | 概算価格（USS） | 数量 | ECCN (US) | Country of Origin | Board production status | 販売代理店からオーダー | STからオーダー |
|---|---|---|---|---|---|---|---|---|---|
| STEVAL-POE005V1 | PM8804, PM8805 | アクティブ | - | EAR99 | ITALY | - | 在庫チェック | 購入 |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
| 製品型番 | 製品ステータス | パッケージ | グレード | RoHSコンプライアンスグレード | WEEE Compliant | Material Declaration** |
|---|---|---|---|---|---|---|
| STEVAL-POE005V1 | アクティブ | CARD | インダストリアル | Ecopack2 | はい | |
STEVAL-POE005V1
Package:
CARDMaterial Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
