Overview
The TPS23785B, produced by Texas Instruments, is a high-power, high-efficiency Power over Ethernet (PoE) powered device (PD) interface and current-mode DC-to-DC controller. This component is specifically optimized for non-isolated converters and supports the IEEE 802.3at standard. It integrates a complete PoE interface with advanced DC-to-DC control features, making it suitable for a variety of power supply applications.
Key Specifications
| Specification | Value |
|---|---|
| Package | HTSSOP (PWP) with 24 pins |
| Operating Temperature Range | -40°C to 125°C |
| Input Power | Up to 30 W |
| Hotswap MOSFET | 100 V, 0.5 Ω |
| Maximum Duty Cycle | 78% |
| Package Quantity | Carrier 60 (Tube), Carrier 2,000 (LARGE T&R) |
Key Features
- Powers up to 30-W input PDs
- DC-to-DC control optimized for non-isolated converters
- Supports high-efficiency topologies
- Complete PoE interface supporting IEEE 802.3at standard
- Enhanced classification with status flag
- Adapter ORing support with options for highest voltage, external adapter preference, and PoE preference
- Robust 100-V, 0.5-Ω hotswap MOSFET
- Industry standard PowerPAD TSSOP-24 package
- Two complementary gate drivers with programmable dead time
- Internal softstart, bootstrap startup source, and current-mode compensation
- Programmable and synchronizable oscillator
- Accurate programmable blanking for current-sense filter design
Applications
The TPS23785B is designed for various high-power applications that require efficient power delivery over Ethernet. These include but are not limited to:
- Power over Ethernet (PoE) devices such as IP phones, wireless access points, and security cameras
- Network switches and routers
- Industrial control systems and automation equipment
- Medical devices requiring reliable and efficient power supply
- Other high-power DC-DC conversion applications where efficiency and reliability are critical
Q & A
- What is the TPS23785B?
The TPS23785B is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode DC-to-DC controller optimized for non-isolated converters. - What is the maximum input power supported by the TPS23785B?
The TPS23785B supports up to 30 W of input power. - What is the operating temperature range of the TPS23785B?
The operating temperature range is -40°C to 125°C. - What type of package does the TPS23785B come in?
The TPS23785B comes in a HTSSOP (PWP) package with 24 pins. - Does the TPS23785B support IEEE 802.3at standard?
Yes, the TPS23785B supports the IEEE 802.3at standard. - What are the key features of the DC-to-DC controller in the TPS23785B?
The DC-to-DC controller features two complementary gate drivers with programmable dead time, internal softstart, bootstrap startup source, current-mode compensation, and a programmable and synchronizable oscillator. - What is the purpose of the hotswap MOSFET in the TPS23785B?
The hotswap MOSFET is a robust 100 V, 0.5 Ω component that allows for safe and reliable power switching. - Can the classification in the TPS23785B be programmed?
Yes, the classification can be programmed to any of the defined types with a single resistor. - What are some common applications of the TPS23785B?
Common applications include PoE devices, network switches, industrial control systems, medical devices, and other high-power DC-DC conversion applications. - How does the TPS23785B support adapter ORing?
The TPS23785B supports adapter ORing with options for highest voltage, external adapter preference, and PoE preference.
