Overview
The TPS23753A, produced by Texas Instruments, is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode DC-DC controller. It is optimized specifically for isolated converter designs and supports the IEEE 802.3at standard as a 13-W, type 1 PD. This device integrates a complete PoE interface with enhanced ESD ride-through capability, making it suitable for a variety of applications requiring reliable and efficient power delivery.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 14-Pin TSSOP |
| Input Voltage Range | 0-57 V |
| Switching Frequency | 223-273 kHz |
| Output Voltages | 5 V / 2 A, 12 V / 0.9 A, 3.3 V / 3 A |
| Junction Temperature Range | –40°C to 125°C |
| ESD Capability | 15-kV and 8-kV system level ESD capable |
| Hotswap MOSFET | Robust 100-V, 0.7-Ω |
Key Features
- Enhanced ESD ride-through capability for uninterrupted device operation during ESD events.
- Optimized for isolated converters with a complete PoE interface supporting IEEE 802.3at standard.
- Adapter ORing support with options for highest voltage, external adapter preference, and PoE preference.
- 12-V adapter support and programmable frequency with synchronization to a higher-frequency external timing reference.
- Bootstrap start-up mechanism with an internal, switched current source for cycling overload fault protection.
- External detection signature pin to disable the internal hotswap MOSFET and program classification with a single resistor.
Applications
- Power over Ethernet (PoE) devices such as IP phones, wireless access points, and security cameras.
- Industrial gateways and IoT devices requiring reliable and efficient power delivery.
- Class 3 PoE applications where high efficiency and isolation are required.
- Low-cost flyback converter designs for various power requirements.
Q & A
- What is the primary function of the TPS23753A?
The TPS23753A is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode DC-DC controller.
- Which PoE standard does the TPS23753A support?
The TPS23753A supports the IEEE 802.3at standard as a 13-W, type 1 PD.
- What is the input voltage range of the TPS23753A?
The input voltage range is 0-57 V.
- What are the output voltage options for the TPS23753A?
The output voltages can be 5 V / 2 A, 12 V / 0.9 A, and 3.3 V / 3 A.
- What is the junction temperature range of the TPS23753A?
The junction temperature range is –40°C to 125°C.
- Does the TPS23753A have ESD protection?
Yes, it is 15-kV and 8-kV system level ESD capable.
- What is the hotswap MOSFET specification?
The hotswap MOSFET is robust 100-V, 0.7-Ω.
- Can the oscillator frequency be synchronized with an external timing reference?
Yes, the programmable oscillator can be synchronized to a higher-frequency external timing reference.
- How does the TPS23753A handle overload fault protection?
The DC-DC controller features a bootstrap start-up mechanism with an internal, switched current source for cycling overload fault protection.
- Can the PoE function be turned off?
Yes, the PoE function can be turned off using the external detection signature pin to disable the internal hotswap MOSFET.
