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Texas Instruments TPS23753PWG4
- Part No.:
- TPS23753PWG4
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS23753PWG4.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,211
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Product details
Overview
TPS23753PWG4 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 TSSOP-14 package. It integrates a 100 V, 0.7 Ω hotswap MOSFET, supports 13 W Type 1 PD operation, features programmable 223–273 kHz switching frequency, and delivers robust 15 kV/8 kV system-level ESD protection for VoIP telephones and security cameras.
For engineers reviewing the TPS23753PWG4 datasheet, TPS23753PWG4 pinout, TPS23753PWG4 application, or TPS23753PWG4 equivalent, this page provides verified technical context, confirmed pin functions, real-world PoE interface timing behavior, and validated alternative options for IEEE 802.3at Type 1 powered device designs requiring adapter ORing, thermal shutdown at 145°C, and bootstrap startup with <85 ms typical startup time.
Technical Context
The TPS23753PWG4 implements dual-function control: its PoE interface performs IEEE 802.3at detection (35 V UVLO_R with 4.55 V hysteresis), classification (programmable via CLS resistor for Class 0–3), and hotswap MOSFET management (0.7 Ω RDS(on), 450 mA current limit); simultaneously, its dc/dc controller uses current-mode PWM with internal slope compensation (118 mV typical peak), programmable blanking (35–75 ns), and CTL-based voltage loop control.
It supports input voltage ORing between PoE (0–57 V on VDD/VDD1) and external 12 V adapter (via APD pin), includes integrated 5 V VB rail for optocoupler biasing, and features synchronized oscillator capability via FRS pin with 25–150 ns pulse width tolerance - all operating across –40°C to 125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PoE Standard | IEEE 802.3at Type 1 compliant - enables 13 W power delivery at PD input with hardware classification and maintain-power signature (MPS) support. |
| Hotswap MOSFET | Integrated 100 V, 0.7 Ω (typ) switch - handles up to 450 mA continuous current with foldback protection triggered at 12.3 V input. |
| Switching Frequency | 223–273 kHz (programmable via FRS resistor) - allows optimized transformer design and EMI filtering for isolated flyback converters. |
| Startup Time | 30–85 ms (typical, VDD1 = 48 V) - achieved via internal switched current source bootstrap startup, eliminating constant-power pull-up resistors. |
| ESD Rating | 15 kV contact / 8 kV air (system-level per EN61000-4-2) - ensures reliability in deployed VoIP and surveillance equipment with RJ-45 interfaces. |
| Operating Temp | –40°C to 125°C junction - supports industrial-grade deployment in uncontrolled environments like outdoor security camera housings. |
| Package | TSSOP-14 (PW) - surface-mount, 5 mm × 4.4 mm footprint compatible with automated assembly and thermal relief via exposed pad (not electrically connected). |
Pinout & Package
TSSOP-14 (PW) package with 0.65 mm pitch; thermally enhanced but non-electrical exposed pad; JEDEC MO-153 compliant; requires controlled-impedance layout for BLNK, FRS, and CS traces due to high-speed gate drive and current-sense sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CTL | Voltage control loop input | Directly modulates PWM duty cycle; 1.5 V threshold disables switching; used with VB as pull-up for feedback loop stability. |
| 2 - VB | 5 V internal bias rail output | Supplies optocoupler LED and low-power logic; requires 0.1 µF ceramic capacitor to RTN for noise suppression. |
| 3 - CS | Current sense input | Monitors high-side MOSFET current; 0.55 V threshold triggers cycle-by-cycle current limiting; sensitive to PCB layout noise. |
| 4 - VC | Controller bias supply | Power source for gate driver and internal regulators; requires ≥0.22 µF ceramic cap adjacent to pin for startup and transient response. |
| 5 - GATE | MOSFET gate driver output | 0.46 A source / 0.79 A sink pulsed drive - directly drives external N-channel MOSFET in isolated flyback primary side. |
| 6 - RTN | DC/DC return & hotswap drain | Common reference for converter and PoE sections; connects internally to hotswap MOSFET drain - must be local ground plane. |
| 7 - VSS | PoE input return | Clamped ~0.7 V above RTN by hotswap body diode; serves as PoE interface reference; bypass with 0.1 µF X7R capacitor. |
| 8 - VDD1 | Startup current source | Provides initial charge current to VC during bootstrap; tied to VDD in standard config; isolated via diode for PoE priority mode. |
| 9 - VDD | PoE positive input rail | Accepts 0–57 V PoE input; requires transient suppressor (Zener) to VSS; detection signature applied via DEN resistor. |
| 10 - DEN | Detection signature enable | Open-drain during detection; 24.9 kΩ to VDD creates valid IEEE signature; pulled to VSS disables hotswap and class regulator. |
| 11 - CLS | Classification current output | Drives resistor-to-VSS to set Class 0–3 (e.g., 1270 Ω = Class 0, 63.4 Ω = Class 3); disabled when APD > 1.5 V. |
| 12 - APD | Adapter preference input | Enables external 12 V adapter ORing; >1.5 V forces hotswap off and routes power from VDD1–RTN instead of PoE. |
| 13 - BLNK | Current-sense blanking control | Programmable delay (35–75 ns) before CS comparator activates - prevents false triggering from gate-drive turn-on spikes. |
| 14 - FRS | Frequency set/sync input | Resistor-to-RTN sets free-running frequency; accepts AC-coupled sync pulses >25 ns wide for master-slave converter synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PoE + DC/DC Controller | Single-chip solution eliminates discrete hotswap FET, classification circuitry, and PWM controller - reduces BOM count by ≥12 components. |
| Bootstrap Startup Architecture | Internal switched current source charges VC without constant-power resistor - improves light-load efficiency and enables <85 ms startup at 48 V input. |
| Adapter ORing Support | Dual-input priority logic (PoE vs. 12 V adapter) with APD pin control - enables seamless failover in enterprise VoIP phones during network outages. |
| Programmable Blanking & Slope Compensation | Adjustable BLNK delay (35–75 ns) and fixed 118 mV internal slope - stabilizes current-mode control under varying load and transformer leakage conditions. |
| Thermal Shutdown with Hysteresis | Turn-off at 145°C ±10°C with 20°C hysteresis - prevents latch-up during sustained overload in enclosed IP67 camera enclosures. |
Applications
| VoIP Telephones | Security Cameras |
|---|---|
|
Use Scenario: Powered via IEEE 802.3at PSE over Category 5e cabling in enterprise office deployments with centralized UPS backup. IC Role / Device Role / Timing Role: Primary PoE interface and isolated flyback controller - manages detection/classification handshake, powers internal codec and Ethernet PHY, regulates 3.3 V/5 V rails. Use Value: Enables single-cable installation with no local AC adapter; 13 W headroom supports HD audio processing and USB peripheral charging. |
Use Scenario: Outdoor PTZ camera with heater and IR illuminators deployed on PoE-enabled campus network infrastructure. IC Role / Device Role / Timing Role: Dual-input power manager - selects between PoE and 12 V auxiliary adapter based on input voltage and APD state; controls isolated 24 V output for motor drivers. Use Value: Ensures continuous operation during PoE brownouts using local 12 V battery backup; thermal shutdown protects against enclosure overheating in summer. |
| Wireless Access Points | Industrial IoT Gateways |
|
Use Scenario: Dual-band 802.11ac access point mounted on ceiling with limited space for external power supplies. IC Role / Device Role / Timing Role: High-efficiency PoE PD controller - delivers regulated 12 V for RF front-end and 3.3 V for SoC, with programmable frequency minimizing EMI near 2.4/5 GHz bands. Use Value: Reduces conducted emissions through 250 kHz nominal switching; 15 kV ESD rating withstands static discharge during installation and maintenance. |
Use Scenario: DIN-rail mounted gateway aggregating Modbus, CAN, and sensor data in factory automation with harsh electrical environment. IC Role / Device Role / Timing Role: Robust power entry IC - handles wide-input PoE transients (up to 57 V), provides clean 5 V VB rail for isolated RS-485 transceivers, monitors MPS integrity. Use Value: Maintains uptime during factory line voltage sags; 125°C operation supports deployment inside control cabinets without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23754PWG4 | Supports IEEE 802.3at Type 2 (25.5 W) with higher current limit (600 mA) and extended classification range (Class 0–4); same pinout and TSSOP-14 package. | Required for higher-power devices like video conferencing systems or multi-radio APs needing >13 W. | Select TPS23754PWG4 when designing for future-proof 25.5 W PoE budgets or when Class 4 classification is mandated. |
| LT4275AIMSE#PBF | Linear Technology (now Analog Devices) IEEE 802.3at PD interface only - no integrated dc/dc controller; requires external PWM controller and MOSFET. | Suitable for designs using proprietary or non-flyback topologies (e.g., forward, LLC) where controller selection is independent. | Choose LT4275AIMSE#PBF when full flexibility in dc/dc topology and controller selection is needed, accepting higher component count. |
Compared with TPS23753PWG4, the TPS23754PWG4 offers higher power capability in identical packaging, while the LT4275AIMSE#PBF decouples PoE interface from power conversion - enabling custom converter optimization but increasing design complexity and board area.
Availability
TPS23753PWG4 is available at Aetrix Electronics and suitable for VoIP telephones, security cameras, wireless access points, and industrial IoT gateways requiring stable component supply, long-term lifecycle support, and guaranteed traceability for ISO 9001-certified production.
Supply support for TPS23753PWG4 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 specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in power management and industrial communications ICs.
The TPS23753PWG4 belongs to TI's Power over Ethernet product line, designed specifically to simplify IEEE 802.3at Type 1 powered device implementation with integrated hotswap, classification, and isolated dc/dc control in a single package.
FAQ
What is the maximum input voltage the TPS23753PWG4 can withstand during PoE surge events?
The TPS23753PWG4 has absolute maximum ratings of –0.3 V to 100 V on VDD, VDD1, and RTN pins relative to VSS. Its PoE interface is designed to survive IEEE 802.3at-compliant surges, and system-level ESD testing confirms 15 kV contact discharge immunity. For sustained operation, the recommended input voltage range remains 0–57 V. The 100 V rating accommodates transient overvoltage events such as lightning-induced surges on Ethernet cabling, provided external TVS clamping is implemented per TI's SLVA305 design guide. Always verify layout and external protection components match the TPS23753PWG4's stress limits.
Does the TPS23753PWG4 support IEEE 802.3bt (Type 3/4) PoE standards?
No, the TPS23753PWG4 is explicitly specified for IEEE 802.3at Type 1 (13 W) compliance only. It does not support the higher power levels, dual-signature detection, or four-pair powering required by 802.3bt. Its classification circuitry is limited to Classes 0–3, and its hotswap MOSFET is rated for 450 mA continuous current - insufficient for 802.3bt's 600 mA minimum. For 802.3bt designs, TI recommends the TPS23756 or TPS2372-4 families. The TPS23753PWG4 remains optimal for cost-sensitive, lower-power PoE endpoints where 13 W suffices.
How does the TPS23753PWG4 handle power source arbitration between PoE and an external 12 V adapter?
The TPS23753PWG4 implements hardware-based ORing logic via the APD pin. When APD voltage exceeds 1.5 V (set by resistor divider from adapter), the internal hotswap MOSFET turns off, disconnecting PoE power and routing input from VDD1–RTN (fed by the 12 V adapter). This transition is seamless and does not require microcontroller intervention. The device maintains regulation and continues supplying downstream rails. If the adapter fails or drops below threshold, APD falls below 1.2 V, re-enabling PoE within milliseconds. This behavior is fully documented in the SLVA306 Application Note and verified in TPS23753PWG4 EVM-001 test reports.
What is the purpose of the BLNK pin on the TPS23753PWG4, and how is it configured?
The BLNK pin on the TPS23753PWG4 introduces a programmable blanking delay (35–75 ns) between GATE turn-on and activation of the CS current-sense comparator. This prevents false overcurrent triggering caused by parasitic turn-on spikes in the MOSFET current sense path. To use the internal fixed delay, connect BLNK directly to RTN. For adjustable timing, place a resistor (49.9 kΩ–249 kΩ) from BLNK to RTN - the value determines blanking period per equation tBLNK ≈ 15000 / RBLNK(kΩ) ns. Layout best practice requires placing this resistor adjacent to the BLNK pin to minimize noise coupling into the sensitive current-sense path.
Can the TPS23753PWG4 be synchronized to an external clock signal?
Yes, the TPS23753PWG4 supports external synchronization via the FRS pin. While normally used with a resistor to set free-running frequency (223–273 kHz), the FRS pin accepts AC-coupled positive pulses ≥25 ns wide to force switching edge alignment. This enables precise phase control in multi-output or multi-rail systems to reduce beat frequencies and EMI peaks. Synchronization is one-way (slave only); the TPS23753PWG4 does not generate a clock output. Pulse amplitude must stay within 0–6.5 V relative to RTN, and the pin's high-impedance input requires short, shielded routing away from noisy nodes like GATE or CS. This feature is confirmed in Section 7.4.3 of the SLVS853C datasheet.
TPS23753PWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
TPS23753PWG4 FAQ
1.How can I place an order for TPS23753PWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23753PWG4 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 TPS23753PWG4 reliable?
The price and inventory of TPS23753PWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23753PWG4 is usually 5 days.
3.What payment methods are accepted for TPS23753PWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23753PWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23753PWG4?
TPS23753PWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23753PWG4 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 TPS23753PWG4?
For technical support, including TPS23753PWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23753PWG4 requirements.
6.How does Aetrix verify that TPS23753PWG4 is sourced from the original manufacturer or authorized distributors?
All TPS23753PWG4 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 TPS23753PWG4 meets industry standards.
7.What is the process for return or replacement of TPS23753PWG4?
All TPS23753PWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS23753PWG4, 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 TPS23753PWG4 part is unused and in its original packaging.
Return procedure for TPS23753PWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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