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Texas Instruments TPS23753APW
- Part No.:
- TPS23753APW
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS23753APW.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,558
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Product details
Overview
TPS23753APW from Texas Instruments is an IEEE 802.3at Type 1 powered device (PD) interface and current-mode DC-DC controller optimized for isolated flyback/forward converters. It integrates a 100-V, 0.7-Ω hotswap MOSFET, supports 13-W PoE power delivery, operates from –40°C to 125°C, and features programmable 223–273 kHz switching frequency with synchronization capability. It enables VoIP phones and security cameras requiring robust ESD immunity and adapter ORing.
For engineers reviewing the TPS23753APW datasheet, TPS23753APW pinout, TPS23753APW application, or TPS23753APW equivalent, this page delivers verified technical context, exact pin functions, real-world implementation constraints, thermal shutdown behavior, classification resistor mapping, and validated alternative options for PoE PD design.
Technical Context
The TPS23753APW implements dual-function circuitry: a full IEEE 802.3at-compliant PoE interface (detection, classification, inrush control, hotswap MOSFET) and a bootstrap-starting current-mode DC-DC controller with internal slope compensation. Its PoE section supports 13-W Type 1 operation with programmable classification (Class 0–3) via single-resistor CLS configuration and detection signature via 24.9-kΩ DEN-to-VDD pullup.
The controller uses VC as primary bias rail (8.65–18 V), VB as regulated 5-V output (4.75–5.25 V) for optocoupler biasing, and GATE as high-current MOSFET driver (0.3–0.6 A source / 0.5–1.1 A sink). Blanking delay (35–75 ns) is programmable via BLNK-to-RTN resistor, and switching frequency (223–273 kHz) is set by FRS-to-RTN resistance per fSW = 15,000/RFRS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PoE Standard Compliance | IEEE 802.3at Type 1 (13 W), superset of 802.3-2008 (802.3af) |
| Hotswap MOSFET RDS(on) | 0.7 Ω max - enables ≤405 mA continuous RTN current at <125°C |
| Switching Frequency Range | 223–273 kHz - programmable via FRS pin; supports external sync above 273 kHz |
| ESD Immunity | ±15 kV air-gap, ±8 kV contact per IEC 61000-4-2 - ensures uninterrupted operation during ESD events |
| Operating Junction Temp | –40°C to 125°C - supports industrial and outdoor PoE endpoints without derating |
| Classification Current Range | 1.8–42 mA - selectable via CLS-to-VSS resistor (1270 Ω to 63.4 Ω) for Class 0–3 |
| Duty Cycle Limit | 76–81% - prevents transformer saturation in isolated topologies under load transients |
Pinout & Package
TPS23753APW is housed in a 14-pin TSSOP package (5.00 mm × 4.40 mm body size) with exposed thermal pad (not electrically connected). Pin functions are validated per TI SLVS933D Rev D (Dec 2020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CTL | Voltage control loop input | Direct PWM duty cycle control; 0–1.7 V disables switching; >1.5 V increases peak current |
| VB | 5-V bias rail output | Regulated 5 V (±2.5%) for optocoupler bias; requires 0.1-μF ceramic cap to RTN |
| CS | Current-sense input | Monitors high-side RCS voltage; 0.55 V threshold triggers current-limit shutdown |
| VC | DC-DC controller bias supply | Primary bias rail (8.65–18 V); powers gate driver and internal regulators; needs ≥0.22-μF local cap |
| GATE | MOSFET gate driver output | Drives external switch with 0.6 A source / 1.1 A sink; critical for isolated converter primary-side timing |
| RTN | DC-DC return & PoE hotswap drain | Common reference for converter primary and PoE output; must be local low-impedance plane |
| VSS | PoE input return | Clamped to RTN via hotswap MOSFET; connects to Ethernet transformer center tap |
| VDD | PoE interface power rail | Derived from PoE input; requires 0.1-μF X7R cap + Zener clamp to VSS per IEEE spec |
| DEN | Detection signature enable | 24.9-kΩ pullup to VDD creates IEEE-compliant 64.3 μA detection current |
| CLS | Classification current output | Sinks programmable current (1.8–42 mA) to VSS to signal PoE PSE class level |
| APD | Adapter preference disable | Pull >1.5 V to disable internal hotswap and force external adapter power path |
| BLNK | Current-sense blanking control | Resistor-to-RTN sets blanking delay (35–75 ns) to ignore turn-on current spikes |
| FRS | Frequency setting/sync input | Resistor-to-RTN sets fSW; AC-coupled pulses enable external sync above free-run frequency |
| VDD1 | Converter start-up current source | Connects to VDD for standard startup; isolatable via diode for PoE-priority sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated hotswap MOSFET | 100-V rating, 0.7-Ω RDS(on), 405-mA continuous current - eliminates external pass transistor and reduces BOM count |
| Bootstrap start-up mechanism | Internal switched current source charges VC from VDD1 - avoids constant-power loss of pullup resistors and improves light-load efficiency |
| Programmable blanking period | 35–75 ns via BLNK resistor - suppresses false overcurrent trips during MOSFET turn-on transients in isolated converters |
| Adapter ORing support | APD pin disables hotswap when >1.5 V applied - enables seamless switchover between PoE and 12-V adapter with voltage qualification |
| Enhanced ESD ride-through | ±15 kV air-gap IEC 61000-4-2 - maintains operation during system-level ESD events without latch-up or reset |
| Thermal shutdown with hysteresis | 145°C trip, 20°C hysteresis - protects against sustained overload while allowing recovery without manual reset |
Applications
| VoIP Telephones | Security Cameras |
|---|---|
Use Scenario: Powered via Category 5e/6 Ethernet cabling in enterprise offices with centralized PoE switches. IC Role / Device Role / Timing Role: Dual-role PD interface and isolated flyback controller managing 12-V/5-V rails from 48-V PoE input. Use Value: Enables single-cable deployment with 13-W headroom for audio processing, DSP, and Ethernet PHY without external hotswap or controller ICs. |
Use Scenario: Outdoor IP cameras requiring reliable power and data over long cable runs with surge/ESD exposure. IC Role / Device Role / Timing Role: IEEE 802.3at-compliant PD front-end and current-mode DC-DC controller with programmable blanking for stable 12-V imaging rail. Use Value: ±15 kV ESD immunity ensures uninterrupted video streaming during lightning-induced transients; thermal shutdown prevents field failures in enclosed housings. |
| Wireless Access Points | Industrial IoT Gateways |
Use Scenario: High-density Wi-Fi 6 APs deployed on ceiling-mounted PoE switches with limited airflow. IC Role / Device Role / Timing Role: PoE classification (Class 3) and isolated forward converter controller delivering 5-V/3.3-V rails with adaptive frequency scaling. Use Value: 125°C junction rating allows full 13-W operation in thermally constrained enclosures; programmable FRS enables noise-sensitive 250-kHz operation. |
Use Scenario: Factory-floor gateways aggregating Modbus, CAN, and sensor data with redundant power inputs. IC Role / Device Role / Timing Role: Adapter ORing controller using APD pin to prioritize 24-V DC adapter over PoE during brownouts or maintenance. Use Value: Seamless failover between PoE and industrial adapter avoids network downtime; classification resistor selection ensures PSE compatibility across vendor fleets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE powered device interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23753PWP | Same die, 14-pin HTSSOP package (6.4 mm × 4.5 mm); 106.6°C/W RθJA vs 106.6°C/W for TSSOP | Identical functionality but larger footprint; better thermal performance in high-airflow layouts | Select for higher ambient temperature environments where PCB space permits larger package |
| LT4275AIMSE#TRPBF | IEEE 802.3at Type 2 (30 W) PD interface only; no integrated DC-DC controller; requires external flyback controller | Supports higher power but adds BOM complexity; lacks TPS23753APW's integrated converter control | Choose when >13 W required and design already includes discrete DC-DC controller |
Compared with TPS23753APW, TPS23753PWP offers identical electrical specs in a thermally enhanced HTSSOP, while LT4275AIMSE#TRPBF provides higher PoE power class at the cost of added controller IC and layout complexity - making TPS23753APW optimal for compact, self-contained 13-W isolated PoE endpoints.
Availability
TPS23753APW is available at Aetrix Electronics and suitable for VoIP telephony, security camera systems, and wireless access points requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS23753APW 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 power management technologies with over 50 years of innovation in industrial, automotive, and communications markets.
The TPS23753A belongs to TI's Power over Ethernet (PoE) PD controller product line, designed specifically for compact, high-reliability powered devices needing integrated PoE interface and isolated DC-DC control in a single IC.
FAQ
What is the maximum continuous current supported by the TPS23753APW hotswap MOSFET?
The TPS23753APW integrates a robust 100-V hotswap MOSFET with 0.7-Ω typical RDS(on), rated for 405 mA continuous current through RTN at TJ ≤ 125°C. This supports full 13-W IEEE 802.3at Type 1 operation with margin for thermal rise. Derating applies above 125°C junction temperature per the device's thermal shutdown threshold at 145°C.
How does the TPS23753APW implement IEEE 802.3at classification?
The TPS23753APW implements IEEE 802.3at classification via its CLS pin, which sinks a precise current (1.8–42 mA) to VSS based on an external resistor. For example, a 1270-Ω resistor sets Class 0 (0.44–3.84 W), while 63.4-Ω configures Class 3 (12.95 W). The classification regulator activates between 11.7–22 V on VDD and includes hysteresis to prevent oscillation during PoE negotiation.
Can the TPS23753APW operate with both PoE and an external 12-V adapter?
Yes, the TPS23753APW supports adapter ORing via its APD pin. Applying >1.5 V to APD disables the internal hotswap MOSFET, forcing power from an external adapter connected between VDD1 and RTN. A resistor divider on APD provides voltage qualification, ensuring the adapter meets minimum voltage before cutting PoE - preventing brownout during switchover.
What is the purpose of the BLNK pin on the TPS23753APW?
The BLNK pin on the TPS23753APW controls current-sense blanking delay to suppress false overcurrent trips during MOSFET turn-on transients. Connecting BLNK to RTN sets a fixed 35–75 ns delay; adding a resistor to RTN allows programmable adjustment. This is critical in isolated converters where primary-side current spikes would otherwise trigger premature shutdown.
Does the TPS23753APW require an external DC-DC controller IC?
No, the TPS23753APW integrates a complete current-mode DC-DC controller with GATE output, VC bias regulation, VB 5-V rail, and internal slope compensation - eliminating need for external controllers in isolated flyback or forward designs. It drives external MOSFETs directly and supports bootstrap start-up from VDD1, reducing system component count and board area.
TPS23753APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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
TPS23753APW FAQ
1.How can I place an order for TPS23753APW through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23753APW 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 TPS23753APW reliable?
The price and inventory of TPS23753APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23753APW is usually 5 days.
3.What payment methods are accepted for TPS23753APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23753APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23753APW?
TPS23753APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23753APW 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 TPS23753APW?
For technical support, including TPS23753APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23753APW requirements.
6.How does Aetrix verify that TPS23753APW is sourced from the original manufacturer or authorized distributors?
All TPS23753APW 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 TPS23753APW meets industry standards.
7.What is the process for return or replacement of TPS23753APW?
All TPS23753APW units undergo pre-shipment inspection (PSI). If there is an issue with TPS23753APW, 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 TPS23753APW part is unused and in its original packaging.
Return procedure for TPS23753APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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