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NXP Semiconductors TEA1892TS/1X
- Part No.:
- TEA1892TS/1X
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Supply Controllers, Monitors
- Package:
- SC-74, SOT-457
- Datasheet:
-
TEA1892TS/1X.pdf
- Description:
- IC SECONDARY SIDE CTRLR 6TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,420
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Product details
Overview
TEA1892TS/1X 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 8.5–38 V supply range, −220 mV typical driver activation threshold, 10 V driver output, and 1.5 μs minimum active time - enabling high-efficiency adapter designs with low external component count.
For engineers reviewing the TEA1892TS/1X datasheet, TEA1892TS/1X pinout, TEA1892TS/1X application, or TEA1892TS/1X equivalent, this page delivers verified functional context, validated pin-level design meaning, confirmed SR timing behavior, and real-world alternative selection guidance for DCM/QR flyback power supplies.
Technical Context
The TEA1892TS/1X implements adaptive zero-current detection via SRSENSE pin sensing, using −12 mV deactivation threshold to terminate MOSFET conduction precisely at current zero-crossing - eliminating standby-mode overhead. Its SOI process enables robust high-voltage tolerance on SRSENSE (up to 120 V) and stable operation across −40 °C to +150 °C junction temperature.
Driver regulation is selectable via SELREG pin: grounding yields −42 mV regulation level; open-circuit yields −30 mV. The 400 mA source / 2.7 A sink capability ensures fast MOSFET switching, while internal UVLO (8.5 V start-up, 8.0 V shutdown) guarantees controlled power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 8.5 V to 38 V - supports wide-input universal AC-DC adapters without auxiliary winding regulation. |
| Driver Output Voltage | 10 V typical - fully enhances standard logic-level and superjunction MOSFETs to minimum RDS(on). |
| SR Activation Threshold | −220 mV typical on SRSENSE - reliably triggers at secondary-side negative voltage swing during flyback reset. |
| Zero-Current Detection | −12 mV deactivation threshold - enables true zero-current switch-off, removing need for separate standby circuitry. |
| Minimum Active Time | 1.5 μs typical - prevents false turn-off from high-frequency ringing during secondary stroke onset. |
| SELREG Regulation Options | −42 mV (SELREG grounded) or −30 mV (SELREG open) - allows optimization for MOSFET gate charge vs. conduction loss trade-off. |
| Max Switching Frequency | 250 kHz - compatible with high-density QR flyback topologies used in compact USB-C PD adapters. |
Pinout & Package
TEA1892TS/1X is housed in a TSOP6 (SOT457) plastic surface-mounted package - 6-pin, 1.1 mm height, 2.9 × 1.5 mm footprint - optimized for high-density secondary-side PCB layout in slim AC-DC adapters.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SRSENSE | Synchronous timing input | Detects secondary-side voltage polarity and magnitude to trigger/terminate SR MOSFET conduction; withstands up to 120 V transient. |
| 2: GND | Ground reference | Common return for all internal circuits and external sense resistor; must be low-inductance connection to minimize noise coupling. |
| 3: VCC | Supply voltage input | Power rail derived from auxiliary winding; UVLO activates at 8.5 V and disables driver below 8.0 V. |
| 4: SELREG | Driver regulation level select | Ground = −42 mV regulation; open = −30 mV; internal 10 μA pull-up enables reliable open-circuit detection. |
| 5: n.c. | No connection | Internally unconnected; must remain floating - no PCB trace or pad required. |
| 6: DRIVER | SR MOSFET gate driver output | Delivers 400 mA source / 2.7 A sink to drive gate capacitance rapidly; clamped at 10 V to ensure full enhancement. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive zero-current detection | Uses −12 mV SRSENSE threshold to terminate conduction exactly at current zero, eliminating standby losses without auxiliary control circuitry. |
| Selectably regulated driver output | Two Vreg(drv) levels (−42 mV / −30 mV) let designers balance MOSFET gate drive strength against conduction loss in high-current or low-RDS(on) designs. |
| High-voltage SRSENSE tolerance | Withstands 120 V continuous on SRSENSE pin - eliminates need for external clamping diodes in high-Vout or high-turn-ratio flyback designs. |
| SOI process integration | Enables monolithic integration of high-side gate driver, precision comparators, and UVLO in single die - reducing BOM count and improving noise immunity. |
| 1.5 μs blanking window | Automatically suppresses SRSENSE signal for 1.5 μs after turn-on to reject EMI-induced false deactivation during transformer ring-out. |
Applications
| USB-C Power Delivery Adapter | Universal Input Laptop Adapter |
|---|---|
Use Scenario: 20–100 W AC-DC adapter delivering programmable 5–20 V output with <50 mW no-load consumption. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier controller that replaces Schottky diode, timed by SRSENSE voltage polarity reversal during flyback reset phase. Use Value: Enables >94% efficiency at full load and <30 mW no-load input power by eliminating diode conduction loss and enabling zero-current turn-off. |
Use Scenario: 65 W dual-output (20 V @ 3.25 A, 5 V @ 3 A) laptop charger with DCM+QR hybrid control and tight thermal envelope. IC Role / Device Role / Timing Role: High-accuracy SR controller managing two parallel SR MOSFETs per output, synchronized to primary-side QR controller via transformer coupling. Use Value: Reduces secondary-side conduction loss by >70% versus diode rectification, lowering heatsink size and enabling 15 mm profile compliance. |
| Compact Wall Plug Charger | Industrial Flyback Auxiliary Supply |
Use Scenario: 18 W ultra-slim wall plug charger (≤25 mm depth) for smartphones with CoC Tier 2 compliance. IC Role / Device Role / Timing Role: Single-chip SR solution driving 30 V logic-level MOSFET on 5 V/3.6 A output, operating in DCM across full line range. Use Value: Achieves 78% reduction in secondary-side power loss versus diode, enabling passive cooling and meeting IEC 62368-1 creepage requirements. |
Use Scenario: 12 V/0.5 A isolated auxiliary supply powering gate drivers and controllers in industrial motor drives. IC Role / Device Role / Timing Role: Robust SR controller handling 120 V transients on SRSENSE, operating over −40 °C to +85 °C ambient with no derating. Use Value: Delivers 3.2 W output with <0.5 W total loss at full load - critical for maintaining system efficiency when main converter is idle. |
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 option; 350 mA source / 2.5 A sink; requires external VCC clamp. | Designed for cost-sensitive DCM-only adapters; lacks SOI ruggedness for high-Vout or noisy environments. | Choose when BOM cost is prioritized over transient resilience and regulation flexibility in ≤36 V output designs. |
| Vishay SiHP12N50C-E3 | Discrete 500 V N-channel MOSFET - not a controller; requires external SR driver IC or primary-side timing feedback. | Used only in hybrid SR implementations where timing is derived from primary controller; adds complexity and latency. | Choose only if existing design uses primary-side SR signaling and cannot accommodate dedicated secondary-side controller footprint. |
Compared with TEA1892TS/1X, NCP4306DR2G offers lower unit cost but sacrifices regulation flexibility and SOI-based HV tolerance, while SiHP12N50C-E3 is not a functional replacement - it's a discrete power device requiring additional timing and drive circuitry.
Availability
TEA1892TS/1X is available at Aetrix Electronics and suitable for USB-C PD adapters, universal laptop chargers, and compact wall plug chargers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TEA1892TS/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 TEA1892TS/1X belongs to NXP's GreenChip family - a product line engineered specifically for high-efficiency, low-noise, and compact AC-DC power conversion in energy-conscious consumer and industrial power supplies.
FAQ
What is the function of the SELREG pin on the TEA1892TS/1X?
The SELREG pin on the TEA1892TS/1X selects the driver regulation voltage level: grounding it sets Vreg(drv) to −42 mV (typical), while leaving it open sets it to −30 mV (typical). An internal 10 μA pull-up ensures reliable open-circuit detection. This selection directly affects MOSFET conduction loss and gate drive strength - making it essential for optimizing efficiency across varying load and output voltage conditions in the TEA1892TS/1X design.
Does the TEA1892TS/1X support both high-side and low-side synchronous rectification configurations?
Yes, the TEA1892TS/1X supports both high-side and low-side SR configurations, as confirmed by Figures 4 and 5 in the official datasheet. In high-side configuration, the SR MOSFET is placed between transformer secondary and output capacitor; in low-side, it is placed between secondary and ground. The TEA1892TS/1X senses SRSENSE polarity identically in both topologies and maintains identical timing behavior - enabling flexible PCB layout without redesigning the TEA1892TS/1X control loop.
What is the maximum voltage rating on the SRSENSE pin of the TEA1892TS/1X?
The SRSENSE pin of the TEA1892TS/1X has a maximum continuous voltage rating of 120 V, as specified in Table 3 (Limiting Values) of the NXP datasheet. This high tolerance allows direct connection to transformer secondaries in high-output-voltage applications (e.g., 48 V PoE or 36 V laptop adapters) without external clamping components - a key reliability advantage enabled by the SOI fabrication process used in the TEA1892TS/1X.
How does the TEA1892TS/1X achieve zero-current switch-off without auxiliary circuitry?
The TEA1892TS/1X achieves zero-current switch-off by monitoring the SRSENSE pin voltage and deactivating the DRIVER output when it rises to −12 mV (Vdeact(drv)). This threshold corresponds to the point where secondary current crosses zero in DCM/QR flyback operation. Because the TEA1892TS/1X performs this detection internally - without requiring external zero-crossing detectors or primary-side synchronization signals - it eliminates standby-mode overhead and simplifies system architecture in the TEA1892TS/1X implementation.
Is the TEA1892TS/1X qualified for automotive applications?
No, the TEA1892TS/1X is not automotive-qualified. As stated in Section 14.3 of the NXP datasheet, unless explicitly designated as automotive qualified, the device is not tested or warranted for automotive use. It lacks AEC-Q100 qualification, extended temperature validation beyond −40 °C to +150 °C junction range, and automotive-grade reliability screening - making it suitable only for industrial, consumer, and computing power supplies, not TEA1892TS/1X automotive ECUs or ADAS modules.
TEA1892TS/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
TEA1892TS/1X FAQ
1.How can I place an order for TEA1892TS/1X through Aetrix?
Please submit a Request for Quotation (RFQ) for TEA1892TS/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 TEA1892TS/1X reliable?
The price and inventory of TEA1892TS/1X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TEA1892TS/1X is usually 5 days.
3.What payment methods are accepted for TEA1892TS/1X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TEA1892TS/1X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TEA1892TS/1X?
TEA1892TS/1X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TEA1892TS/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 TEA1892TS/1X?
For technical support, including TEA1892TS/1X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TEA1892TS/1X requirements.
6.How does Aetrix verify that TEA1892TS/1X is sourced from the original manufacturer or authorized distributors?
All TEA1892TS/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 TEA1892TS/1X meets industry standards.
7.What is the process for return or replacement of TEA1892TS/1X?
All TEA1892TS/1X units undergo pre-shipment inspection (PSI). If there is an issue with TEA1892TS/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 TEA1892TS/1X part is unused and in its original packaging.
Return procedure for TEA1892TS/1X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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