My Inquiry
My Account
Texas Instruments TPS23753PWRG4
- Part No.:
- TPS23753PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS23753PWRG4.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,157
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS23753PWRG4 from Texas Instruments is an IEEE 802.3at-compliant Power over Ethernet (PoE) powered device (PD) interface and current-mode isolated dc/dc controller in a 14-pin TSSOP package. It integrates a 100 V, 0.7 Ω hotswap MOSFET, supports 13 W type 1 PD operation, delivers programmable 223–273 kHz switching frequency, and operates across –40°C to 125°C junction temperature for VoIP telephones and security cameras.
For engineers reviewing the TPS23753PWRG4 datasheet, TPS23753PWRG4 pinout, TPS23753PWRG4 application, or TPS23753PWRG4 equivalent, this page provides verified technical context, confirmed pin functions, real-world PoE interface timing behavior, isolated converter startup characteristics, and validated alternative options for IEEE 802.3at PD designs.
Technical Context
The TPS23753PWRG4 implements dual-domain control: a PoE front-end with detection signature generation (via DEN), hardware classification (via CLS resistor programming), and robust 100 V hotswap protection; and a current-mode dc/dc controller with bootstrap startup, internal slope compensation (90–142 mV), and programmable blanking (35–75 ns) to suppress gate-turn-on current spikes.
It supports adapter ORing via APD pin voltage qualification (1.42–1.58 V threshold), synchronous frequency locking via FRS pin (25–150 ns pulse width), and dual-input bias sourcing (VDD1 startup current source, VC bias rail with 0.22 µF minimum bypass) - all coordinated under a single thermal shutdown mechanism (135–155°C turn-off).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PoE Standard | IEEE 802.3at Type 1 compliant (13 W at PI, supports full detection/classification/MPS) |
| Hotswap MOSFET | 100 V absolute max rating, 0.7 Ω typical on-resistance, 405–505 mA current limit |
| Switching Frequency | 223–273 kHz (programmable via FRS resistor; sync-capable up to higher external frequencies) |
| Startup Mechanism | Internal switched current source from VDD1 to VC; 30–175 ms startup time depending on VDD1 and CVC |
| Classification Range | Programmable Class 0–3 via CLS-to-VSS resistor (e.g., 1270 Ω = 2.14 mA, Class 0) |
| ESD Rating | 15 kV contact / 8 kV air system-level ESD per EN61000-4-2 |
| Operating Temp | –40°C to 125°C junction temperature range, with 20°C hysteresis on thermal shutdown |
Pinout & Package
TPS23753PWRG4 is housed in a 14-pin TSSOP (PW) package with 0.65 mm pitch, JEDEC MO-153 compliant, and thermally enhanced for PoE PD applications requiring high-voltage isolation and compact layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CTL | PWM control loop input | Voltage-controlled duty cycle modulation; 1.3–1.7 V disables switching; VB used as pull-up |
| 2 VB | 5 V bias rail output | Stable 4.75–5.25 V supply for optocoupler feedback and control circuits; requires 0.1 µF to RTN |
| 3 CS | Current sense input | Monitors high-side MOSFET current; 0.50–0.60 V threshold triggers GATE termination |
| 4 VC | Controller bias supply | Primary bias for gate driver and internal regulators; requires ≥0.22 µF ceramic capacitor to RTN |
| 5 GATE | MOSFET gate driver output | 0.30–0.60 A source / 0.50–1.1 A sink capability; drives external isolated dc/dc switch |
| 6 RTN | DC/DC return & hotswap drain | Common reference for converter primary and PoE pass device; internally tied to hotswap MOSFET drain |
| 7 VSS | PoE input return | Clamped diode-drop above RTN; reference for PoE interface; current-limited hotswap connection to RTN |
| 8 VDD1 | Startup current source | Source of bootstrap current to VC; connect to VDD for standard operation; isolatable for PoE priority |
| 9 VDD | PoE positive input rail | Derived from PoE source; 0–57 V operating range; bypassed with 0.1 µF X7R capacitor to VSS |
| 10 DEN | Detection signature enable | 24.9 kΩ to VDD generates IEEE-compliant detection resistance; pulled to VSS disables hotswap |
| 11 CLS | Classification current output | Resistor-programmed current source (1.8–39.9 mA) defining IEEE 802.3at power class |
| 12 APD | Adapter preference input | 1.42–1.58 V threshold enables external adapter ORing; disables CLS when asserted |
| 13 BLNK | Current-sense blanking control | Internally set or resistor-programmed delay (35–75 ns) to ignore gate-turn-on current spike |
| 14 FRS | Frequency setting/sync input | Resistor sets free-running frequency (223–273 kHz); accepts ac-coupled sync pulses >25 ns wide |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PoE + DC/DC Controller | Single-chip solution eliminates discrete interface IC + PWM controller coordination issues in isolated flyback/buck-boost PDs |
| Adapter ORing Support | APD pin enables seamless switchover between PoE and 12 V adapter inputs without external logic or diodes |
| Robust Hotswap Protection | 100 V rated, 0.7 Ω RDS(on), foldback threshold at 11–13.6 V, and 40–180 mA inrush limiting prevent cable surge damage |
| Programmable Startup Timing | VDD1-to-VC current source allows controlled soft-start independent of auxiliary winding availability |
| System-Level ESD Hardening | 15 kV contact / 8 kV air ESD rating meets IEC 61000-4-2 requirements for deployed network equipment |
| Thermal Fault Coordination | Single thermal shutdown (135–155°C) simultaneously disables PoE interface and dc/dc controller to prevent cascade failure |
Applications
| VoIP Telephones | Wireless Access Points |
|---|---|
Use Scenario: Powered via Category 5e/6 cabling from PoE switch in enterprise office environments with optional 12 V wall adapter backup. IC Role / Device Role / Timing Role: TPS23753PWRG4 acts as primary PoE interface and isolated flyback controller, managing detection, classification, MPS maintenance, and regulated 3.3 V/5 V output generation. Use Value: Enables single-cable deployment with failover to local adapter, eliminating need for separate AC/DC adapter and reducing BOM count by integrating hotswap + PWM + bias rails. |
Use Scenario: High-density Wi-Fi 5/6 access point with dual-band radios, requiring stable 12 V/5 V rails and reliable PoE startup under variable cable lengths and PSE types. IC Role / Device Role / Timing Role: TPS23753PWRG4 provides IEEE 802.3at-compliant classification (Class 3), programmable blanking for noisy RF environments, and synchronized switching to reduce EMI coupling into antenna paths. Use Value: Delivers deterministic startup (<175 ms) and robust current-mode regulation even with 100 m cable drop, ensuring rapid network association and consistent RF performance. |
| IP Security Cameras | Industrial IoT Gateways |
Use Scenario: Outdoor PTZ camera with heater, IR illuminator, and video streaming, drawing burst current up to 400 mA while maintaining MPS. IC Role / Device Role / Timing Role: TPS23753PWRG4 manages PoE inrush limiting (100–180 mA), foldback protection during heater activation, and thermal shutdown coordination across analog and digital subsystems. Use Value: Prevents PSE port shutdown during heater transients by enforcing IEEE 802.3at current templates and providing accurate 13 W power budgeting. |
Use Scenario: Edge gateway aggregating Modbus, CAN, and sensor data in factory automation, requiring long-term reliability and supply continuity across PoE and industrial adapter inputs. IC Role / Device Role / Timing Role: TPS23753PWRG4 serves as dual-input power manager with APD-based adapter preference, thermal monitoring for sealed enclosures, and -40°C to 125°C operation for uncontrolled environments. Use Value: Ensures uninterrupted operation during PoE maintenance windows via automatic adapter takeover, with traceable thermal margins validated across full industrial temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD interface and isolated converter controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23753PW | Same die, identical electrical specs, but non-G4 suffix (no enhanced ESD or flow-through packaging) | No system-level ESD certification; not qualified for 15 kV contact/8 kV air per EN61000-4-2 | Select TPS23753PWRG4 when deploying in field-deployed equipment requiring certified ESD immunity. |
| LT4275AIMSE#TRPBF | IEEE 802.3at-compliant PD interface only - no integrated dc/dc controller; requires external PWM IC | Supports Class 4 (25.5 W) and higher-power PoE++ modes; lacks built-in gate driver and VC bias generation | Choose LT4275AIMSE#TRPBF when designing >13 W PDs or requiring multi-rail isolated outputs with independent controller tuning. |
Compared with TPS23753PW, the TPS23753PWRG4 adds certified 15 kV/8 kV system-level ESD protection and tighter thermal hysteresis control; compared with LT4275AIMSE#TRPBF, it integrates the entire dc/dc control loop but limits maximum power to 13 W and does not support PoE++.
Availability
TPS23753PWRG4 is available at Aetrix Electronics and suitable for VoIP telephones, wireless access points, IP security cameras, and industrial IoT gateways requiring stable component supply, long-life PoE compatibility, and certified ESD resilience.
Supply support for TPS23753PWRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The TPS23753PWRG4 belongs to TI's Power over Ethernet product line, designed specifically for single-chip IEEE 802.3at Type 1 powered devices requiring integrated hotswap, classification, and isolated dc/dc control in space-constrained networked equipment.
FAQ
What is the maximum input voltage the TPS23753PWRG4 can withstand on its VDD pin?
The TPS23753PWRG4 has an absolute maximum VDD rating of 100 V, with recommended operating range from 0 V to 57 V. This 100 V tolerance accommodates transient surges on PoE lines, including worst-case lightning-induced spikes and PSE turn-on overshoot, while maintaining functional operation within the 57 V ceiling defined by IEEE 802.3at.
How does the TPS23753PWRG4 implement IEEE 802.3at detection and classification?
The TPS23753PWRG4 implements IEEE 802.3at detection using a 24.9 kΩ resistor from DEN to VDD to generate the required 23.75–26.25 kΩ incremental resistance signature. Classification is achieved via a resistor from CLS to VSS, selecting Class 0–3 currents (1.8–39.9 mA) that correspond to 0.44–12.95 W power budgets at the powered device input.
Can the TPS23753PWRG4 be used with an external 12 V adapter in parallel with PoE?
Yes - the TPS23753PWRG4 supports adapter ORing via the APD pin. When APD is pulled above 1.42 V (e.g., via resistor divider from a 12 V adapter), the internal hotswap MOSFET turns off and power is sourced exclusively from the adapter. This enables seamless failover without external diodes or controllers.
What is the purpose of the BLNK pin on the TPS23753PWRG4?
The BLNK pin on the TPS23753PWRG4 introduces a programmable blanking delay (35–75 ns) between GATE turn-on and CS current sensing activation. This prevents false overcurrent triggering caused by parasitic turn-on spikes in the MOSFET current sense path, ensuring stable current-mode control in high-dV/dt isolated topologies.
Does the TPS23753PWRG4 include thermal protection, and how does it behave?
Yes - the TPS23753PWRG4 incorporates a single thermal shutdown circuit that turns off both the PoE hotswap MOSFET and dc/dc controller when junction temperature exceeds 135–155°C. It includes 20°C hysteresis, so operation resumes only after temperature falls below 115–135°C, preventing oscillatory shutdown during thermal overload conditions.
TPS23753PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Controller (PD), DC/DC
- Number of Channels:
- 1
- Power - Max:
- 13 W
- Internal Switch(s):
- Both
- Auxiliary Sense:
- No
- Standards:
- 802.3at (PoE+), 802.3af (PoE)
- Voltage - Supply:
- 0V ~ 57V
- Current - Supply:
- 580µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
TPS23753PWRG4 FAQ
1.How can I place an order for TPS23753PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23753PWRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS23753PWRG4 reliable?
The price and inventory of TPS23753PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23753PWRG4 is usually 5 days.
3.What payment methods are accepted for TPS23753PWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23753PWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23753PWRG4?
TPS23753PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23753PWRG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS23753PWRG4?
For technical support, including TPS23753PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23753PWRG4 requirements.
6.How does Aetrix verify that TPS23753PWRG4 is sourced from the original manufacturer or authorized distributors?
All TPS23753PWRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS23753PWRG4 meets industry standards.
7.What is the process for return or replacement of TPS23753PWRG4?
All TPS23753PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS23753PWRG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS23753PWRG4 part is unused and in its original packaging.
Return procedure for TPS23753PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS23753PWRG4 Tags
-
TPS2378DDAR
Texas Instruments
-
TPS23753APWR
Texas Instruments
-
TPS23756PWPR
Texas Instruments
-
TPS23750PWPR
Texas Instruments
-
MP8007GV-Z
Monolithic Power Systems Inc.
-
TPS23861PWR
Texas Instruments
-
TPS23753PWR
Texas Instruments
-
PD69201ILD-TR
Microchip Technology
-
SI3402-B-GM
Skyworks Solutions Inc.
-
SI3402-B-GMR
Skyworks Solutions Inc.
-
SI34071-A01-GMR
Skyworks Solutions Inc.
-
SI3404-A-GMR
Skyworks Solutions Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
