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NXP Semiconductors TEA1892ATS/1H
- Part No.:
- TEA1892ATS/1H
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Supply Controllers, Monitors
- Package:
- SC-74, SOT-457
- Datasheet:
-
TEA1892ATS/1H.pdf
- Description:
- IC SECONDARY SIDE CTRLR 6TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,169
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Product details
Overview
TEA1892ATS/1H from NXP Semiconductors is a synchronous rectifier (SR) controller IC for secondary-side operation in discontinuous conduction mode (DCM) and quasi-resonant (QR) flyback converters. It features an 8.5 V to 38 V supply range, −220 mV typical driver activation threshold on SRSENSE, 10 V driver output voltage, and 0.8 µs minimum active time. It enables high-efficiency adapter designs with low external component count.
For engineers reviewing the TEA1892ATS/1H datasheet, TEA1892ATS/1H pinout, TEA1892ATS/1H application, or TEA1892ATS/1H equivalent, this page delivers verified functional role, validated timing thresholds, confirmed driver capability, and real-world implementation constraints for DCM/QR flyback SR systems.
Technical Context
The TEA1892ATS/1H implements zero-current detection via SRSENSE voltage monitoring: it activates the DRIVER output when SRSENSE falls below −220 mV (typ), regulates at either −42 mV or −30 mV (selected by SELREG pin), and deactivates at −12 mV (typ). Its internal timer blanks sensing for 0.8 µs after turn-on to suppress ringing-induced false shutdown.
It integrates a high-current driver with 400 mA source / 2.7 A sink capability and 10 V output clamping, fabricated in Silicon-On-Insulator (SOI) process for robustness. UVLO engages below 8.0 V (typ) and releases above 8.5 V (typ), ensuring stable start-up in wide-input adapters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 8.5 V to 38 V - supports universal AC input adapters without auxiliary winding regulation |
| Driver Output Voltage | 10 V (typ) - ensures full enhancement of low-RDS(on) MOSFETs across brands |
| SRSENSE Activation Threshold | −220 mV (typ) - detects secondary current zero-crossing with high noise immunity |
| Regulation Voltage Options | −42 mV (SELREG grounded) or −30 mV (SELREG open) - selects optimal MOSFET conduction window |
| Minimum Active Time | 0.8 µs (typ) - prevents premature turn-off during transformer ringing |
| UVLO Hysteresis | 0.5 V (typ) - provides stable power cycling without oscillation near threshold |
| Max Switching Frequency | 400 kHz - compatible with high-frequency QR flyback topologies |
Pinout & Package
TEA1892ATS/1H 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 current polarity and zero-crossing via voltage drop across sense resistor |
| 2: GND | Ground reference | Common return path for all internal circuits and driver sink current |
| 3: VCC | Supply voltage input | Power source for internal circuitry; enters UVLO if < 8.0 V (typ) |
| 4: SELREG | Driver regulation level select | GND = −42 mV regulation; open = −30 mV - adjusts MOSFET conduction duration |
| 5: n.c. | Not connected | No internal connection; must remain unconnected per design |
| 6: DRIVER | SR MOSFET gate driver output | Delivers 400 mA source / 2.7 A sink to switch external power MOSFET rapidly |
Key Features
| Feature | Design Value |
|---|---|
| Accurate zero-current detection | Uses −12 mV (typ) deactivation threshold on SRSENSE to eliminate standby-mode overhead |
| Selectably regulated driver output | Two Vreg(drv) levels (−42 mV / −30 mV) via SELREG pin enable optimization for RDS(on) vs. switching loss trade-offs |
| High-current gate drive | 2.7 A sink capability ensures fast MOSFET turn-off, minimizing conduction overlap losses |
| SOI process fabrication | Enhances ruggedness against voltage transients and improves reliability in high-voltage flyback secondaries |
| Integrated UVLO protection | Prevents erratic operation during brown-out or startup by holding DRIVER low until VCC ≥ 8.5 V (typ) |
Applications
| USB-C PD Adapters | Lightweight Laptop Adapters |
|---|---|
Use Scenario: 20–65 W USB-C Power Delivery adapters requiring >90% efficiency across load range. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier controller that replaces Schottky diode to reduce conduction loss and enable no-load efficiency compliance. Use Value: Enables 0.5–1.2% absolute efficiency gain over diode rectification at full load and eliminates standby power penalty via zero-current turn-off. |
Use Scenario: Slim-profile 45–65 W laptop adapters operating in QR flyback mode with universal AC input. IC Role / Device Role / Timing Role: Gate driver for low-RDS(on) N-channel MOSFET on secondary side, synchronized to primary-side QR controller timing. Use Value: Reduces secondary-side conduction loss by >60% versus 40 V Schottky, enabling smaller heatsinks and higher power density. |
| Universal Input Wall Adapters | Industrial Auxiliary Power Supplies |
Use Scenario: Multi-output 5–24 V wall adapters for consumer electronics with tight no-load power requirements (<75 mW). IC Role / Device Role / Timing Role: Synchronous rectifier controller managing MOSFET conduction window based on sensed secondary current polarity and magnitude. Use Value: Achieves <30 mW no-load consumption via automatic zero-current turn-off, meeting DOE Level VI and EU CoC Tier 2 standards. |
Use Scenario: 12–24 V auxiliary supplies in industrial PLCs or motor drives using DCM flyback topology. IC Role / Device Role / Timing Role: High-reliability SR controller interfacing with transformer secondary winding to replace lossy diode-based rectification. Use Value: Improves thermal margin by reducing secondary-side dissipation by up to 1.8 W at 2 A output, extending capacitor lifetime in high-temperature environments. |
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 NCP4307DR2G | Operates from 4.5 V to 32 V; uses external Vref for regulation; lacks SOI process | Requires external reference and bias network; less robust in high-dV/dt environments | Preferred where lower VCC start-up is required and board space allows extra components |
| Diodes Incorporated AP4313KTR-G1 | Fixed −35 mV regulation; 600 mA source / 2.5 A sink; no SELREG pin option | Less flexible MOSFET optimization; narrower VCC range (6.5 V to 36 V) | Selected when design prioritizes simplicity over fine-tuned efficiency tuning |
Compared with NCP4307DR2G and AP4313KTR-G1, the TEA1892ATS/1H offers wider VCC range, dual regulation levels via SELREG, and SOI-based ruggedness-making it optimal for cost-sensitive, high-efficiency universal-input adapters where layout simplicity and transient immunity are critical.
Availability
TEA1892ATS/1H is available at Aetrix Electronics and suitable for USB-C PD adapters, lightweight laptop adapters, and universal input wall adapters requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TEA1892ATS/1H 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/1H belongs to NXP's GreenChip family of high-efficiency power conversion ICs, designed specifically to replace lossy diode rectifiers in flyback SMPS with minimal external components and maximum system-level efficiency.
FAQ
What is the primary function of the TEA1892ATS/1H in a power supply?
The TEA1892ATS/1H is a synchronous rectifier controller IC that replaces the secondary-side Schottky diode in DCM and quasi-resonant flyback converters. It senses secondary current via the SRSENSE pin and drives an external MOSFET to minimize conduction losses. Its precise zero-current detection and 10 V gate drive enable high-efficiency operation across load conditions, directly improving adapter efficiency and thermal performance in the TEA1892ATS/1H-based design.
How does the SELREG pin affect TEA1892ATS/1H operation?
The SELREG pin on the TEA1892ATS/1H selects between two driver regulation voltages: grounding SELREG sets Vreg(drv) to −42 mV (typ), while leaving it open sets it to −30 mV (typ). This adjustment changes the MOSFET conduction window to optimize RDS(on) utilization versus switching loss trade-offs. The internal 10 µA pull-up ensures reliable open-state detection, and the TEA1892ATS/1H's functional description confirms this selection directly impacts timing accuracy and efficiency in real-world flyback implementations.
What is the minimum active time specification for TEA1892ATS/1H and why is it important?
The TEA1892ATS/1H has a minimum synchronous rectification active time of 0.8 µs (typ), blanking the SRSENSE input after driver turn-on to suppress high-frequency ringing artifacts. This prevents false turn-off caused by transformer leakage inductance spikes at the start of the secondary stroke. Without this blanking, erratic MOSFET switching would occur, increasing losses and EMI-making the 0.8 µs timing parameter essential for stable operation in the TEA1892ATS/1H-based QR flyback design.
Does TEA1892ATS/1H support both high-side and low-side synchronous rectification configurations?
Yes, the TEA1892ATS/1H supports both high-side and low-side synchronous rectification, as confirmed by Figures 4 and 5 in its official datasheet. In high-side configuration, the MOSFET source connects to the transformer secondary winding and drain to output; in low-side, source connects to ground and drain to winding. The TEA1892ATS/1H's driver output and sensing architecture are agnostic to placement, and its application diagrams explicitly validate both topologies for use with the TEA1892ATS/1H in production-grade adapter designs.
What protection features are integrated into the TEA1892ATS/1H?
The TEA1892ATS/1H integrates UnderVoltage Protection (UVP) with hysteresis: it disables the DRIVER output when VCC drops below 8.0 V (typ) and re-enables only above 8.5 V (typ), preventing unstable operation during brown-out. It also includes internal current limiting on DRIVER (±3 A max) and electrostatic discharge protection rated at ±2 kV (HBM) and ±500 V (CDM). These protections ensure robust field operation and are fully specified in the TEA1892ATS/1H datasheet's Limiting Values table.
TEA1892ATS/1H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- GreenChip™
- Package/Case:
- SC-74, SOT-457
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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/1H FAQ
1.How can I place an order for TEA1892ATS/1H through Aetrix?
Please submit a Request for Quotation (RFQ) for TEA1892ATS/1H 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/1H reliable?
The price and inventory of TEA1892ATS/1H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TEA1892ATS/1H is usually 5 days.
3.What payment methods are accepted for TEA1892ATS/1H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TEA1892ATS/1H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TEA1892ATS/1H?
TEA1892ATS/1H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TEA1892ATS/1H 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/1H?
For technical support, including TEA1892ATS/1H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TEA1892ATS/1H requirements.
6.How does Aetrix verify that TEA1892ATS/1H is sourced from the original manufacturer or authorized distributors?
All TEA1892ATS/1H 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/1H meets industry standards.
7.What is the process for return or replacement of TEA1892ATS/1H?
All TEA1892ATS/1H units undergo pre-shipment inspection (PSI). If there is an issue with TEA1892ATS/1H, 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/1H part is unused and in its original packaging.
Return procedure for TEA1892ATS/1H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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