TPS23755RJJR
ActiveIEEE 802.3AT POE PD WITH NO-OPTO FLYBACK DC-DC CONTROLLER
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TPS23755RJJR
ActiveIEEE 802.3AT POE PD WITH NO-OPTO FLYBACK DC-DC CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | TPS23755RJJR |
|---|---|
| Auxiliary Sense | True |
| Current - Supply | 2 mA |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 23 Leads |
| Package / Case | 24-VFDFN Exposed Pad |
| Standards | 802.3at (PoE) |
| Supplier Device Package | 24-VSON (6x4) |
| Type | Controller (PD), DC/DC |
| Voltage - Supply [Max] | 57 V |
| Voltage - Supply [Min] | 0 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 2.97 | |
| 10 | $ 2.67 | |||
| 25 | $ 2.52 | |||
| 100 | $ 2.15 | |||
| 250 | $ 2.02 | |||
| 500 | $ 1.76 | |||
| 1000 | $ 1.46 | |||
| Digi-Reel® | 1 | $ 2.97 | ||
| 10 | $ 2.67 | |||
| 25 | $ 2.52 | |||
| 100 | $ 2.15 | |||
| 250 | $ 2.02 | |||
| 500 | $ 1.76 | |||
| 1000 | $ 1.46 | |||
| Tape & Reel (TR) | 3000 | $ 1.00 | ||
| Texas Instruments | LARGE T&R | 1 | $ 1.79 | |
| 100 | $ 1.48 | |||
| 250 | $ 1.06 | |||
| 1000 | $ 0.80 | |||
Description
General part information
TPS23755 Series
The TPS23755 device combines a Power over Ethernet (PoE) powered device (PD) interface, a 150-V switching power FET, and a current-mode DC-DC controller optimized for flyback topology. The high level of integration along with primary side regulation (PSR), spread spectrum frequency dithering (SSFD), and advanced startup makes the TPS23755 an ideal solution for size-constrained applications. The PoE implementation supports the IEEE 802.3at standard as a 13-W, Type 1 PD.
The PSR feature of the DC-DC controller uses feedback from an auxiliary winding for control of the output voltage, eliminating the need for external shunt regulator and optocoupler. It is optimized for operation with secondary side diode rectifier (typically 12-V output or higher). Typically, the converter operates in continuous conduction mode (CCM) at a switching frequency of 250 kHz.
SFFD and slew rate control helps to minimize the size and cost of the EMI filter. Advanced Startup allows the use of minimal bias capacitor while simplifying converter startup and hiccup design.
Documents
Technical documentation and resources
