component
TPS23753APWR
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Texas Instruments Power Over Ethernet (PoE) Controllers, TSSOP-14. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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Symbol & Footprint
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PCB Footprint
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Datasheet
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README
markdownTPS23753APWR
Texas Instruments · Power Over Ethernet (PoE) Controllers · TSSOP-14
TPS23753APWR from Texas Instruments, in a TSSOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CTL | input | Control loop input to the PWM (pulse width modulator). Use VB as a pullup for CTL. Input resistance ~100 kΩ; 0% duty cycle threshold ~1.5 V. |
| 2 | VB | power_out | 5-V bias rail output for DC-DC control circuits. Apply a 0.1-µF ceramic capacitor to RTN. VB may be used to bias an external optocoupler for feedback. Output ~5.0 V, sourcing up to 5 mA. |
| 3 | CS | input | DC-DC converter switching MOSFET current-sense input. Connect CS to the high side of RCS. Maximum threshold voltage VCSMAX ~0.55 V. |
| 4 | VC | power_in | DC-DC converter bias voltage. The internal start-up current source and converter bias winding output power this pin. Connect a 0.22-µF minimum ceramic capacitor to RTN, and a larger capacitor to help start-up. UVLO ~9 V rising / 3.5 V hysteresis; operating range 8.5-18 V. |
| 5 | GATE | output | Gate drive output for the DC-DC converter switching MOSFET. Average sourcing/sinking current up to 25 mARMS. |
| 6 | RTN | power_in | Negative rail input to the DC-DC converter and output of the PoE hotswap. Serves as the local return reference for controller-side circuitry. |
| 7 | VSS | power_in | Negative power rail derived from the PoE source. Serves as the reference for the PoE interface section (hotswap MOSFET source). |
| 8 | VDD1 | power_in | Source of the DC-DC converter start-up current. Connect to VDD for most applications. Rated up to 100 V to RTN (absolute max). |
| 9 | VDD | power_in | Positive input power rail for the PoE interface circuit, derived from the PoE source. Recommended operating range 0-57 V; absolute max 100 V. |
| 10 | DEN | bidirectional | PoE detection enable. Connect a 24.9-kΩ resistor from DEN to VDD to provide the PoE detection signature. Pulling this pin to VSS during powered operation causes the internal hotswap MOSFET to turn off. |
| 11 | CLS | output | Classification current program pin. Connect a resistor from CLS to VSS to program the PoE classification current (class 1-4). |
| 12 | APD | input | Adapter present detect. Pull APD above 1.5 V to disable the internal PD hotswap switch, forcing power to come from an external adapter. Connect to the adapter through a resistor divider. |
| 13 | BLNK | bidirectional | Leading-edge blanking program pin. Connect to RTN to use the internally set blanking period (~52 ns) or connect through a resistor (up to 350 kΩ) to RTN to program a longer blanking period. |
| 14 | FRS | bidirectional | Frequency-set/synchronization pin. Connect a resistor from FRS to RTN to program the converter switching frequency (e.g. RFRS = 60.4 kΩ → ~248 kHz). Also accepts an external sync pulse (VSYNC ≈ 2.2 V, ≥25 ns wide). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-14 |
| Category | PMIC |
| Pins | 14 |
Ordering variants
Same part, different packaging or reel option.
TPS23753APWR
CAD (KiCad official)
- Symbol:
TPS23753APWR - Footprint:
Package_SO:TSSOP-14_4.4x5mm_P0.65mm - 3D model: TSSOP-14 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (37 pp, sha256
e8343e8c85c094ad, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).