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NXP Semiconductors TEA1792TS/1Z
- Part No.:
- TEA1792TS/1Z
- Manufacturer:
- NXP Semiconductors
- Category:
- PFC (Power Factor Correction)
- Package:
- SC-74, SOT-457
- Datasheet:
-
TEA1792TS/1Z.pdf
- Description:
- IC SYNC RECT CONTROLLER 6TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,170
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Product details
Overview
TEA1792TS/1Z from NXP Semiconductors is a synchronous rectifier (SR) controller IC for secondary-side use in discontinuous conduction mode (DCM) and quasi-resonant (QR) flyback converters. It features 8.5–38 V supply range, −220 mV typical activation threshold on SRSENSE, 10 V driver output, and selectable −42 mV/−30 mV regulation voltage via SELREG pin - enabling high-efficiency adapter designs with low RDS(on) MOSFETs.
For engineers reviewing the TEA1792TS/1Z datasheet, TEA1792TS/1Z pinout, TEA1792TS/1Z application, or TEA1792TS/1Z equivalent, key selection criteria include its SOI process fabrication, 1.8 µs minimum active timing, UVLO with 8.5 V startup/8.0 V stop, and dual-regulation-level driver for optimized zero-current switch-off in no-load to full-load operation.
Technical Context
The TEA1792TS/1Z implements adaptive synchronous rectification by sensing negative voltage excursions on the SRSENSE pin to trigger and regulate the DRIVER output. Its internal timer blanks input detection for 1.8 µs after activation to suppress ringing-induced false turn-off.
Regulation level selection (−42 mV or −30 mV) is determined by grounding or leaving open the SELREG pin, leveraging an internal 10 µA pull-up. The driver delivers 400 mA source / 2.7 A sink capability with 10 V max output, supporting fast MOSFET switching and efficient zero-current detection at −12 mV deactivation threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 8.5 V to 38 V - supports wide-input universal AC-DC adapters without auxiliary winding dependency |
| Driver Output Max Voltage | 10 V typical - ensures full enhancement of low-RDS(on) MOSFETs across brands |
| SRSENSE Activation Threshold | −220 mV typical - enables precise turn-on timing during secondary current rise |
| Regulation Voltage Options | −42 mV (SELREG grounded) or −30 mV (SELREG open) - selects optimal Vreg for MOSFET gate drive efficiency |
| Minimum Active Time | 1.8 µs typical - prevents misoperation during very short QR secondary strokes |
| UVLO Startup/Stop | 8.5 V / 8.0 V typical - provides clean power sequencing and brown-out immunity |
| Driver Sink Current | 2.7 A typical at 9.5 V - enables rapid MOSFET turn-off for minimized conduction loss |
Pinout & Package
TEA1792TS/1Z is housed in a TSOP6 (SOT457) plastic surface-mounted package with 6 leads, optimized for compact adapter PCB layouts and thermal performance (Rth(j-a) = 259 K/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRSENSE | Synchronous timing input | Detects secondary-side voltage polarity and magnitude to control MOSFET switching timing |
| 2 - GND | Ground reference | Common return path for all internal circuits and external feedback components |
| 3 - VCC | Supply voltage input | Powers internal circuitry; enters UVLO if < 8.0 V, starts operation at > 8.5 V |
| 4 - SELREG | Driver regulation level select | GND = −42 mV regulation; open = −30 mV - sets MOSFET conduction window precision |
| 5 - n.c. | No connection | Internally unconnected; must remain floating or tied to GND per layout guidelines |
| 6 - DRIVER | SR MOSFET gate driver output | Delivers up to 10 V, 400 mA source / 2.7 A sink to directly drive external power MOSFET |
Key Features
| Feature | Design Value |
|---|---|
| SOI process fabrication | Enables high-voltage tolerance on SRSENSE (up to 120 V) and robust operation in noisy flyback environments |
| Selectably regulated driver output | Two Vreg(drv) options (−42 mV/−30 mV) allow tuning for specific MOSFET gate charge and conduction loss trade-offs |
| Programmable blanking time | 1.8 µs minimum active time prevents false turn-off from high-frequency ringing at secondary stroke onset |
| Zero-current detection logic | Deactivates DRIVER at −12 mV on SRSENSE - eliminates need for standby mode while maintaining >85% efficiency at no load |
| Integrated UVLO with hysteresis | 0.5 V typical hysteresis ensures stable start-up and shutdown without oscillation during marginal VCC conditions |
Applications
| USB-C PD Adapters | Lightweight Laptop Adapters |
|---|---|
Use Scenario: 20–65 W USB-C Power Delivery adapters requiring >90% efficiency across 5–20 V output range. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier controller that replaces Schottky diode to reduce conduction loss and improve thermal performance. Use Value: Enables compact form factor and no-load power < 75 mW via zero-current switch-off, meeting DOE Level VI and EU CoC Tier 2 requirements. | Use Scenario: Slim-profile 45–65 W laptop adapters operating from 90–264 VAC input with DCM/QR flyback topology. IC Role / Device Role / Timing Role: High-accuracy SR timing controller using SRSENSE voltage sensing to synchronize MOSFET conduction with secondary current waveform. Use Value: Achieves >92% peak efficiency and < 100 mW no-load consumption by eliminating reverse recovery loss and optimizing gate drive regulation. |
| Industrial Wall-Mount Adapters | Medical Grade Low-Power PSUs |
Use Scenario: 15–30 W industrial wall-mount adapters powering IoT gateways and sensors in ambient temperatures up to 60 °C. IC Role / Device Role / Timing Role: Robust SR controller with 120 V SRSENSE rating and SOI isolation, tolerant of transformer leakage spikes and EMI. Use Value: Maintains stable regulation under variable line/load conditions and supports extended thermal derating due to low 0.27 W Ptot dissipation. | Use Scenario: 5–15 W medical-grade isolated power supplies requiring low leakage current, high reliability, and IEC 60601-1 compliance. IC Role / Device Role / Timing Role: Secondary-side SR controller managing MOSFET switching without compromising isolation barrier integrity. Use Value: Reduces heat generation in enclosed enclosures and supports long-term reliability with junction temperature rated to +150 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NCP4306DR2G | Fixed −30 mV regulation; no SELREG pin; 6-pin SOT-23 package; lower driver sink (1.5 A) | Targeted at cost-sensitive DCM adapters where dual-regulation flexibility is not required | Choose when board space is constrained and only one regulation level suffices |
| Infineon ICE5QSBG | Integrated primary-side QR controller + secondary-side SR driver in single SO8 package; no separate SRSENSE pin | Used in highly integrated QR flyback designs where primary and secondary control co-location reduces component count | Choose for new designs seeking monolithic QR+SR integration rather than discrete SR control |
Compared with NCP4306DR2G and ICE5QSBG, the TEA1792TS/1Z offers unique dual-regulation-level selection and SOI-based high-noise immunity, making it optimal for high-reliability DCM/QR adapters requiring field-tunable SR timing and robust operation under transformer ringing.
Availability
TEA1792TS/1Z is available at Aetrix Electronics and suitable for USB-C PD adapters, lightweight laptop adapters, and industrial wall-mount power supplies requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TEA1792TS/1Z 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The TEA1792TS/1Z belongs to NXP's GreenChip family of energy-efficient power conversion ICs, designed specifically to replace lossy diodes in secondary-side rectification and meet stringent global energy efficiency standards.
FAQ
What is the function of the SELREG pin on the TEA1792TS/1Z?
The SELREG pin on the TEA1792TS/1Z selects the driver regulation voltage level: grounding it sets Vreg(drv) to −42 mV (typical), while leaving it open selects −30 mV (typical). This allows designers to optimize MOSFET conduction timing and efficiency for specific RDS(on) and gate charge characteristics. The internal 10 µA pull-up ensures reliable open-state detection. This feature is unique to the TEA1792TS/1Z within its product class and directly impacts zero-current switch-off accuracy.
Does the TEA1792TS/1Z require an auxiliary winding for VCC supply?
No, the TEA1792TS/1Z does not require an auxiliary winding for VCC supply. It operates from 8.5 V to 38 V and is typically powered from the main output capacitor through a resistive dropper or small-capacitor feed network. Its wide input range and low 1.2 mA typical operating current enable direct VCC derivation from the output rail - simplifying adapter design and reducing component count. This capability is explicitly confirmed in the TEA1792TS/1Z functional description and application diagrams.
What is the maximum voltage rating on the SRSENSE pin of the TEA1792TS/1Z?
The SRSENSE pin of the TEA1792TS/1Z has a maximum continuous voltage rating of 120 V, as specified in the Absolute Maximum Ratings table. This high rating is enabled by its Silicon-On-Insulator (SOI) process technology and allows direct connection to the secondary winding without external clamping in most DCM/QR flyback implementations. The 120 V rating ensures robustness against transformer leakage spikes and transient overvoltages common in compact adapter designs.
How does the TEA1792TS/1Z achieve zero-current switch-off without a dedicated current-sense resistor?
The TEA1792TS/1Z achieves zero-current switch-off by monitoring the voltage polarity and magnitude on the SRSENSE pin: when the sensed voltage rises to −12 mV (Vdeact(drv)), the DRIVER output is actively pulled low, turning off the external MOSFET precisely as secondary current crosses zero. This method eliminates reverse recovery loss and avoids the need for a shunt resistor or additional sensing circuitry. The technique is intrinsic to the TEA1792TS/1Z's architecture and is validated in Figure 3 of its official datasheet.
Is the TEA1792TS/1Z pin-compatible with earlier NXP SR controllers like TEA1791?
No, the TEA1792TS/1Z is not pin-compatible with TEA1791. While both are SR controllers in NXP's GreenChip portfolio, TEA1792TS/1Z uses a 6-pin TSOP6 (SOT457) package with dedicated SELREG and n.c. pins, whereas TEA1791 uses a different pinout and functionality set. The TEA1792TS/1Z datasheet confirms distinct pin configuration (Table 2) and block diagram architecture. Migration requires PCB layout revision and firmware or external circuit adjustments to accommodate the SELREG control and updated timing parameters.
TEA1792TS/1Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- GreenChip™
- Package/Case:
- SC-74, SOT-457
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Mode:
- Discontinuous Conduction (DCM)
- Frequency - Switching:
- -
- Current - Startup:
- -
- Voltage - Supply:
- 8.5V ~ 38V
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74
TEA1792TS/1Z FAQ
1.How can I place an order for TEA1792TS/1Z through Aetrix?
Please submit a Request for Quotation (RFQ) for TEA1792TS/1Z 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 TEA1792TS/1Z reliable?
The price and inventory of TEA1792TS/1Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TEA1792TS/1Z is usually 5 days.
3.What payment methods are accepted for TEA1792TS/1Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TEA1792TS/1Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TEA1792TS/1Z?
TEA1792TS/1Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TEA1792TS/1Z 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 TEA1792TS/1Z?
For technical support, including TEA1792TS/1Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TEA1792TS/1Z requirements.
6.How does Aetrix verify that TEA1792TS/1Z is sourced from the original manufacturer or authorized distributors?
All TEA1792TS/1Z 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 TEA1792TS/1Z meets industry standards.
7.What is the process for return or replacement of TEA1792TS/1Z?
All TEA1792TS/1Z units undergo pre-shipment inspection (PSI). If there is an issue with TEA1792TS/1Z, 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 TEA1792TS/1Z part is unused and in its original packaging.
Return procedure for TEA1792TS/1Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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