TPS23770
- Complete 802.3af PoE Interface
- Features derived from the TPS2375
- 100 V, 0.6
Internal Pass MOSFET - Standard and Legacy UVLO Choices
- Fixed 140 mA Inrush Limit
- Primary Side DC/DC Converter Control
- Minimum External Component Count
- Current Mode Control
- Isolated and Non-Isolated Topologies
- Programmable Operating Frequency
- Current Sense Leading-edge Blanking
- 50% Duty Cycle Limiting
- Voltage Output Error Amplifier
- Internal PoE and Converter Sequencing
- Industry-Standard 20 Lead Package
- Industrial Temperature Range, -40°C to 85°C
- APPLICATIONS
- All PoE PD Devices Including:
- Wireless Access Points
- VoIP Phones
- Security Cameras
- All PoE PD Devices Including:
PowerPAD is a trademark of Texas Instruments.
The TPS23750 integrates the functionality of the TPS2375 with a primary side dc/dc PWM controller. The designer can create a front-end solution for PoE-PD applications with minimum external components. The TPS23770 is identical to the TPS23750 with the exception of the undervoltage lockout turn-on voltage, which is compatible with legacy systems.
The PoE front end has all the necessary IEEE 802.3af functions including detection, classification, undervoltage lockout and inrush control. The PoE input switch is integrated within the TPS23750.
The dc/dc controller section is designed to support flyback, forward, and nonsynchronous low-side switch buck topologies.
The external switching MOSFET and current sense resistor provide flexibility in topology, power level, and current limit. The full-featured dc/dc controller includes programmable soft start, hiccup type fault limiting, 50% maximum duty cycle, programmable constant switching frequency, and a true voltage-output error amplifier. Additional protection features provide for robust designs.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | Integrated 100-V IEEE 802.3af PD and DC/DC Controller 数据表 (Rev. B) | 2008-2-7 | |||
| 应用手册 | PoE PD 原理图审查指南 | 英语版 | PDF | HTML | 2022-1-3 | ||
| 应用手册 | PoE Powered Devices Debug Guidelines | PDF | HTML | 2021-7-19 | |||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | Designing an EMI Compliant PoE with Isolated Flyback | 2008-5-20 | ||||
| 应用手册 | Practical Guidelines EMI Compliant PoE | 2008-3-27 |
设计与开发
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TPS23750EVM-107 — TPS23750 评估模块降压
The TPS23750EVM-107 evaluation module implements an IEEE 802.3af-compliant class-3 power interface and a non-isolated DC/DC switching converter using the Texas Instruments TPS23750 powered device (PD) controller in a typical power-over-Ethernet (PoE) configuration.
TPS23750EVM-108 — TPS23750 评估模块反向
The TPS23750EVM-108 evaluation module implements an IEEE 802.3af-compliant class-3 power interface and a DC/DC switching converter using the Texas Instruments TPS23750 powered device (PD) controller in a typical power-over-Ethernet (PoE) configuration.
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
订购和质量
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