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NXP Semiconductors TEA1892ATS/1X
- Part No.:
- TEA1892ATS/1X
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Supply Controllers, Monitors
- Package:
- SC-74, SOT-457
- Datasheet:
-
TEA1892ATS/1X.pdf
- Description:
- IC SECONDARY SIDE CTRLR 6TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,180
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Product details
Overview
TEA1892ATS/1X from NXP Semiconductors is a synchronous rectifier (SR) controller IC for DCM and quasi-resonant flyback converters, fabricated in SOI process. It delivers accurate SR timing with driver output voltage up to 10 V, supports 8.5–38 V supply range, and enables high-efficiency adapter designs with minimal external components.
For engineers reviewing the TEA1892ATS/1X datasheet, TEA1892ATS/1X pinout, TEA1892ATS/1X application, or TEA1892ATS/1X equivalent, this page provides verified functional parameters, TSOP6 package mapping, SRSENSE-triggered zero-current switch-off behavior, and validated alternative options for cost-optimized, green-mode power supplies.
Technical Context
The TEA1892ATS/1X implements adaptive synchronous rectification by sensing negative voltage thresholds on the SRSENSE pin: activation at −220 mV (typ), regulation at −42 mV/−30 mV (SELREG-selectable), and deactivation at −12 mV (typ). Its internal timer blanks SRSENSE input for 0.8 μs (typ) after MOSFET turn-on to suppress ringing-induced false turn-off.
Driver stage features 400 mA source / 2.7 A sink capability, 10 V (typ) output clamping, and dual-mode regulation controlled via SELREG pin grounding or open-circuit configuration. UVLO engages below 8.0 V (typ) and releases above 8.5 V (typ) on VCC, ensuring stable start-up in low-power adapters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 8.5 V to 38 V - supports wide-input universal AC-DC adapters without auxiliary bias winding. |
| SRSENSE Activation | −220 mV (typ) - detects secondary-side current zero-crossing for precise MOSFET turn-on timing. |
| Driver Output Voltage | 10 V (typ) - ensures full enhancement of low-RDS(on) SR MOSFETs across brands. |
| SELREG Selectable Regulation | −42 mV (SELREG grounded) or −30 mV (SELREG open) - adjusts regulation point for optimal conduction loss vs. noise immunity trade-off. |
| Maximum Switching Frequency | 400 kHz - compatible with high-frequency QR flyback topologies for compact magnetics. |
| UVLO Hysteresis | 0.5 V (typ) - prevents oscillation during brown-out conditions in unregulated input rails. |
| tact(sr)(min) | 0.8 μs (typ) - blanking window eliminates false turn-off from transformer leakage ringing. |
Pinout & Package
TEA1892ATS/1X is housed in a TSOP6 (SOT457) plastic surface-mounted package with 6 leads, optimized for high-density adapter PCB layouts and thermal performance (Rth(j-a) = 259 K/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SRSENSE (Pin 1) | Synchronous rectification timing input | Detects secondary-side voltage polarity and magnitude to trigger and regulate SR MOSFET gate drive. |
| GND (Pin 2) | Ground reference | Common return path for all internal circuits and external feedback networks. |
| VCC (Pin 3) | Supply voltage input | Power source for internal circuitry; UVLO monitoring occurs here with 8.5 V start-up threshold. |
| SELREG (Pin 4) | Driver regulation level selection | Grounding selects −42 mV regulation; open-circuit selects −30 mV for higher noise margin or lower conduction loss. |
| n.c. (Pin 5) | No connection | Internally unconnected; must remain floating or tied to GND per layout best practice. |
| DRIVER (Pin 6) | SR MOSFET gate driver output | Delivers 400 mA source / 2.7 A sink to rapidly switch external power MOSFET with 10 V clamp. |
Key Features
| Feature | Design Value |
|---|---|
| Accurate SR timing with blanking | 0.8 μs (typ) SRSENSE blanking prevents false turn-off from high-frequency ringing during secondary stroke. |
| Selectably regulated driver output | Two Vreg(drv) levels (−42 mV / −30 mV) enable optimization for RDS(on) vs. EMI robustness in final design. |
| Zero-current switch-off | Deactivation at −12 mV (typ) on SRSENSE enables no-load efficiency retention without standby mode. |
| High-drive capability | 2.7 A sink current ensures fast SR MOSFET turn-off, minimizing reverse recovery losses in QR operation. |
| SOI process integration | Enables high-voltage tolerance on SRSENSE (up to 120 V) and improved noise immunity in noisy flyback environments. |
Applications
| USB-C PD Adapters | Laptop Power 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: Synchronous rectifier controller managing secondary-side MOSFET switching synchronized to QR flyback valley detection. Use Value: Eliminates diode conduction loss, enabling compact form factor and no-load power < 30 mW per IEC 62301 Ed.2. |
Use Scenario: 65–90 W laptop adapters operating from 90–264 VAC input with tight thermal constraints. IC Role / Device Role / Timing Role: Secondary-side SR controller interfacing with primary-side QR controller to maintain ZVS/ZCS across line/load. Use Value: Achieves >92% average efficiency and meets CoC Tier 2 requirements without auxiliary winding or complex control loops. |
| Universal Travel Adapters | Industrial SMPS Modules |
Use Scenario: Dual-output (5 V/20 V) travel adapters supporting multiple legacy and USB-C devices. IC Role / Device Role / Timing Role: Single-chip SR controller managing independent rectification paths via configurable SRSENSE sensing network. Use Value: Reduces BOM count by eliminating discrete SR drivers and enables single-layer PCB routing for cost-sensitive consumer designs. |
Use Scenario: DIN-rail mounted 24 V/48 V industrial power modules requiring long-term reliability and thermal stability. IC Role / Device Role / Timing Role: Robust SR controller with SOI-based HV tolerance on SRSENSE pin for operation under high dv/dt transients. Use Value: Maintains regulation accuracy over −40 °C to +125 °C ambient with junction temperature limited 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; 500 mA source / 2.5 A sink; requires external RC timing network. | Targeted at fixed-output QR flybacks where regulation point tuning is unnecessary; lacks SOI process advantages. | Choose when board space allows external timing components and system-level noise immunity is sufficient without blanking. |
| Infineon ICE5QSBG | Integrated QR flyback controller + SR driver in one IC; no separate SRSENSE pin; uses primary-side sensing architecture. | Reduces component count but limits flexibility in multi-output or custom secondary-side sensing configurations. | Prefer for new designs where primary-side control simplifies transformer design and eliminates secondary-side signal routing. |
Compared with TEA1892ATS/1X, NCP4306DR2G offers simpler implementation but less timing precision and no blanking, while ICE5QSBG consolidates control but sacrifices secondary-side sensing fidelity and design adaptability in multi-rail systems.
Availability
TEA1892ATS/1X is available at Aetrix Electronics and suitable for USB-C PD adapters, laptop power supplies, and universal travel chargers requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for TEA1892ATS/1X 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 TEA1892ATS/1X belongs to NXP's GreenChip family of energy-efficient power conversion ICs, designed specifically to meet stringent global energy regulations (e.g., DoE Level VI, CoC Tier 2) in AC-DC adapter applications.
FAQ
What is the function of the SELREG pin on the TEA1892ATS/1X?
The SELREG pin on the TEA1892ATS/1X selects the driver regulation voltage level: grounding it sets Vreg(drv) to −42 mV (typ), while leaving it open selects −30 mV (typ). This adjustment directly impacts SR MOSFET conduction loss and noise immunity-critical for optimizing efficiency in varying load and EMI conditions. The TEA1892ATS/1X internally sources 10 µA into SELREG, enabling reliable open-circuit detection without external pull-ups.
How does the TEA1892ATS/1X achieve zero-current switch-off without a dedicated standby mode?
The TEA1892ATS/1X achieves zero-current switch-off by detecting the −12 mV (typ) threshold on the SRSENSE pin, which corresponds to near-zero secondary current. Upon crossing this level, the DRIVER output is actively pulled low, turning off the SR MOSFET precisely at current zero-crossing. This eliminates reverse recovery loss and maintains high efficiency down to no-load, making a separate standby mode unnecessary. The TEA1892ATS/1X implements this entirely autonomously using its internal comparator and timing logic.
What is the purpose of the 0.8 μs blanking time after SR MOSFET turn-on in the TEA1892ATS/1X?
The 0.8 μs (typ) blanking time on the TEA1892ATS/1X disables SRSENSE input immediately after DRIVER turn-on to prevent false deactivation caused by high-frequency ringing at the start of the secondary stroke. This blanking window ensures only valid current-sense signals-after transient settling-are used for regulation and deactivation decisions. It is hard-coded in the TEA1892ATS/1X's internal timer and requires no external configuration.
Can the TEA1892ATS/1X be used in continuous conduction mode (CCM) flyback converters?
No-the TEA1892ATS/1X is explicitly designed for discontinuous conduction mode (DCM) and quasi-resonant (QR) flyback converters only. Its functional description, timing architecture, and SRSENSE sensing thresholds assume secondary current reaches zero before each switching cycle. Using the TEA1892ATS/1X in CCM would result in incorrect SR timing, potential shoot-through, and failure to regulate. The TEA1892ATS/1X datasheet confirms this limitation in both General Description and Applications sections.
What is the maximum voltage rating on the SRSENSE pin of the TEA1892ATS/1X?
The SRSENSE pin of the TEA1892ATS/1X has a maximum continuous voltage rating of 120 V, as specified in the Absolute Maximum Ratings table. This high tolerance-enabled by the Silicon-On-Insulator (SOI) fabrication process-allows direct connection to secondary windings in high-output-voltage adapters (e.g., 20 V USB-C PD) without external voltage clamping. The TEA1892ATS/1X maintains accurate sensing across this full range while rejecting common-mode noise typical in flyback topologies.
TEA1892ATS/1X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- GreenChip™
- Package/Case:
- SC-74, SOT-457
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- Secondary-Side Controller, Synchronous Rectifier
- Voltage - Input:
- -
- Voltage - Supply:
- 8.5V ~ 38V
- Current - Supply:
- 1 mA
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74
TEA1892ATS/1X FAQ
1.How can I place an order for TEA1892ATS/1X through Aetrix?
Please submit a Request for Quotation (RFQ) for TEA1892ATS/1X 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 TEA1892ATS/1X reliable?
The price and inventory of TEA1892ATS/1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TEA1892ATS/1X is usually 5 days.
3.What payment methods are accepted for TEA1892ATS/1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TEA1892ATS/1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TEA1892ATS/1X?
TEA1892ATS/1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TEA1892ATS/1X 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 TEA1892ATS/1X?
For technical support, including TEA1892ATS/1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TEA1892ATS/1X requirements.
6.How does Aetrix verify that TEA1892ATS/1X is sourced from the original manufacturer or authorized distributors?
All TEA1892ATS/1X 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 TEA1892ATS/1X meets industry standards.
7.What is the process for return or replacement of TEA1892ATS/1X?
All TEA1892ATS/1X units undergo pre-shipment inspection (PSI). If there is an issue with TEA1892ATS/1X, 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 TEA1892ATS/1X part is unused and in its original packaging.
Return procedure for TEA1892ATS/1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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