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NXP Semiconductors TEA1995T/1J
- Part No.:
- TEA1995T/1J
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Supply Controllers, Monitors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TEA1995T/1J.pdf
- Description:
- IC CTRLR SYNC RECT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,875
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Product details
Overview
TEA1995T/1J from NXP Semiconductors is a dual-channel synchronous rectifier (SR) controller IC for secondary-side operation in resonant and multi-output flyback power supplies. It features adaptive gate drive, independent dual sensing inputs (DSA/SSA and DSB/SSB), 4.5 V to 38 V supply range, and SO8 package. It replaces diodes with SR MOSFETs in LLC and flyback topologies to reduce conduction loss in desktop PC, TV, and adapter power supplies.
For engineers reviewing the TEA1995T/1J datasheet, TEA1995T/1J pinout, TEA1995T/1J application, or TEA1995T/1J equivalent, key selection criteria include dual independent SR channel control, differential drain-source sensing, UVLO with active gate pull-down, energy-save mode <200 μA, and compatibility with logic-level MOSFETs at 5 V operation.
Technical Context
The TEA1995T/1J implements adaptive gate drive per channel using differential voltage sensing between drain (DSA/DSB) and source (SSA/SSB) pins to enable and regulate external SR MOSFETs without minimum on-time constraint. Each channel operates independently with dedicated turn-on activation threshold (−400 mV typ), regulation level (−55 mV typ), and fast turn-off triggered by drain voltage rise above 150 mV.
It integrates an internal 5 V regulator, UVLO (start: 4.55 V typ, stop: 4.2 V typ), and high-current gate drivers (1.0 A sink / 1.0 A source typ at 12 V) fabricated in Silicon-On-Insulator (SOI) process. The IC supports both central-tap LLC transformer secondaries and low-side SR placement in multi-output flyback converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 38 V - enables direct bias from auxiliary winding or bulk rail without external LDO in wide-input adapters and TVs. |
| VACT(drv) | −400 mV typ - precise negative threshold triggers SR turn-on when MOSFET body diode begins conduction, minimizing reverse recovery loss. |
| VREG(drv) | −55 mV typ - regulates gate drive to maintain optimal RDS(on) conduction while avoiding shoot-through during light load. |
| Gate Drive Sink/Source | 1.0 A typ each - ensures fast MOSFET switching edges (<80 ns activation delay) to support up to 500 kHz resonant operation. |
| Energy-Save Current | 160 μA typ - reduces standby power in no-load conditions without compromising wake-up responsiveness. |
| Drain Sense Voltage Range | −0.8 V to +100 V - accommodates high-voltage secondary windings in universal-input 230 V AC adapters and server PSUs. |
| UVLO Thresholds | VSTART = 4.55 V, VSTOP = 4.2 V - provides hysteresis to prevent oscillation during brown-out and ensures reliable restart after input dip. |
Pinout & Package
TEA1995T/1J is housed in an SO8 plastic small outline package (SOT96-1), 3.9 mm body width, JEDEC MS-012 compliant, with 1.27 mm pitch and exposed pad not present. Thermal resistance Rth(j-a) = 140 K/W on JEDEC test board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GDB | Gate drive output B | High-current driver for SR MOSFET B; actively pulled low during UVLO or fault. |
| GND | Ground reference | Common return for all analog and digital circuitry; separate source-sense routing required to avoid dI/dt noise coupling. |
| DSB | Drain sense input B | High-voltage input (−0.8 V to +100 V) detecting MOSFET B drain voltage to determine conduction timing. |
| SSB | Source sense input B | Low-voltage differential input (±0.4 V) connected directly to MOSFET B source to enable accurate VDS sensing. |
| SSA | Source sense input A | Low-voltage differential input (±0.4 V) for MOSFET A; must be routed close to MOSFET A source pin to minimize PCB inductance error. |
| DSA | Drain sense input A | High-voltage input (−0.8 V to +100 V) for MOSFET A; used with SSA to compute real-time VDS for adaptive control. |
| VCC | Supply voltage input | Bias input requiring local decoupling capacitor; enters UVLO below 4.2 V and exits above 4.55 V. |
| GDA | Gate drive output A | High-current driver for SR MOSFET A; delivers up to 11.0 V gate voltage at 12 V VCC for low RDS(on) enhancement. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive gate drive per channel | Eliminates fixed timing constraints by dynamically adjusting gate voltage based on real-time VDS, enabling optimal efficiency across 0–100% load in LLC and flyback. |
| Dual independent sensing paths | Separate DSA/SSA and DSB/SSB inputs allow simultaneous, uncorrelated control of two SR MOSFETs on split secondary windings or independent outputs. |
| Active gate pull-down during UVLO | Ensures SR MOSFETs remain fully off during start-up, brown-out, or fault-preventing unintended conduction and improving system safety. |
| Logic-level compatibility at 5 V | Delivers 4.95 V gate drive at 5 V VCC, enabling use of low-threshold MOSFETs without level-shifting, simplifying design for compact adapters. |
| Energy-save mode current | 160 μA typical quiescent current reduces no-load power consumption below 30 mW in ENERGY STAR-compliant designs. |
Applications
| Desktop PC Power Supply | TV Power Supply |
|---|---|
Use Scenario: 240 W dual-rail (12 V/5 V) resonant PSU with central-tap transformer and dual secondary windings. IC Role / Device Role / Timing Role: TEA1995T/1J controls two SR MOSFETs on each secondary winding to replace Schottky diodes, synchronizing turn-on with transformer voltage polarity reversal. Use Value: Reduces secondary conduction loss by >40% vs. diode rectification, enabling 80 PLUS Titanium efficiency at full load and <30 mW no-load power. |
Use Scenario: 120 W multi-output flyback PSU powering main DC rails and standby circuitry in 4K UHD television. IC Role / Device Role / Timing Role: TEA1995T/1J drives low-side SR MOSFETs on 12 V and 5 V outputs, using independent DSA/SSA and DSB/SSB sensing for cross-regulation stability. Use Value: Enables <150 mV output ripple under dynamic load steps and meets IEC 62301 standby power limits without auxiliary linear regulators. |
| Universal Input Adapter | Server Auxiliary PSU |
Use Scenario: 65 W GaN-based adapter supporting USB PD 3.0 with variable output (5–20 V) and wide AC input (90–264 V AC). IC Role / Device Role / Timing Role: TEA1995T/1J operates in LLC half-bridge topology, adapting gate drive per channel to maintain ZVS across input and load variations. Use Value: Achieves >94% peak efficiency and <75 mW no-load consumption, meeting DOE Level VI and CoC Tier 2 requirements. |
Use Scenario: 30 W isolated auxiliary PSU for motherboard management controller (BMC) and fan control in 1U rack server. IC Role / Device Role / Timing Role: TEA1995T/1J controls dual SR MOSFETs on split 3.3 V and 5 V outputs in flyback configuration, with independent sensing rejecting common-mode noise from high-dI/dt primary side. Use Value: Delivers ±1.5% cross-regulation and withstands 100 V transient surges on secondary due to −0.8 V to +100 V drain sense rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NCP4306DR2G | Single-channel SR controller with external oscillator; lacks dual independent sensing and adaptive regulation loop. | Requires external timing components and cannot natively support dual-winding LLC without additional logic. | Choose when cost sensitivity outweighs efficiency optimization and only one SR channel is needed. |
| Infineon IRS27952SPBF | Integrated LLC driver + SR controller in single chip; includes primary-side half-bridge gate drivers but no differential source sensing. | Targets integrated LLC solutions where primary and secondary control are co-located; less flexible for discrete secondary-side optimization. | Prefer when consolidating BOM count and designing new LLC platforms with Infineon's ecosystem. |
Compared with NCP4306DR2G and IRS27952SPBF, the TEA1995T/1J uniquely delivers true dual-channel independence with differential source sensing and adaptive regulation-enabling higher efficiency in high-density, multi-output resonant and flyback converters where secondary-side optimization is critical.
Availability
TEA1995T/1J is available at Aetrix Electronics and suitable for desktop PC power supplies, TV power supplies, and universal-input adapters requiring stable component supply, long-term lifecycle assurance, and compliance with ENERGY STAR and DoE Level VI standards.
Supply support for TEA1995T/1J 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 TEA1995T/1J belongs to NXP's GreenChip portfolio of high-efficiency power conversion ICs, designed specifically to maximize energy savings in AC-DC adapters, open-frame PSUs, and consumer electronics power supplies.
FAQ
What is the function of the DSA and DSB pins on the TEA1995T/1J?
The DSA and DSB pins on the TEA1995T/1J are high-voltage drain sense inputs rated from −0.8 V to +100 V. They detect the drain voltage of external SR MOSFETs A and B respectively, enabling the IC to determine conduction timing by comparing against source-sense inputs (SSA/SSB). This differential measurement forms the basis for adaptive gate drive activation and regulation in the TEA1995T/1J.
Does the TEA1995T/1J support 5 V operation with logic-level MOSFETs?
Yes, the TEA1995T/1J supports 5 V operation with logic-level MOSFETs. When supplied with 5 V on the VCC pin, the TEA1995T/1J delivers a regulated 4.95 V gate drive output (VGDA/VGDB), sufficient to fully enhance standard logic-level SR MOSFETs without external level shifters-reducing BOM count and layout complexity in compact adapter designs.
How does the TEA1995T/1J handle undervoltage lockout (UVLO)?
The TEA1995T/1J implements UVLO with a 4.55 V start threshold and 4.2 V stop threshold, providing 350 mV hysteresis. During UVLO, both GDA and GDB outputs are actively pulled low via internal 4 Ω gate pull-down resistors (Rpd(G)), ensuring SR MOSFETs remain safely off. This prevents erratic switching during brown-out or start-up transients in the TEA1995T/1J.
Can the TEA1995T/1J be used in multi-output flyback converters?
Yes, the TEA1995T/1J is explicitly qualified for multi-output flyback converters. It supports low-side SR MOSFET placement on multiple outputs, using independent DSA/SSA and DSB/SSB sensing channels to maintain regulation accuracy and cross-load stability. Its wide 4.5–38 V supply range allows direct biasing from any output winding in such configurations.
What thermal performance can be expected from the TEA1995T/1J in SO8 package?
The TEA1995T/1J in SO8 (SOT96-1) package has a junction-to-ambient thermal resistance (Rth(j-a)) of 140 K/W on a JEDEC test board. With a maximum junction temperature of +150 °C and ambient of +50 °C, it supports up to ~715 mW total power dissipation-sufficient for typical SR controller operation even at full load in high-efficiency 65–120 W power supplies using the TEA1995T/1J.
TEA1995T/1J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- GreenChip™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Secondary-Side Controller, Synchronous Rectifier
- Voltage - Input:
- -
- Voltage - Supply:
- 38V
- Current - Supply:
- 160 µA
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
TEA1995T/1J FAQ
1.How can I place an order for TEA1995T/1J through Aetrix?
Please submit a Request for Quotation (RFQ) for TEA1995T/1J 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 TEA1995T/1J reliable?
The price and inventory of TEA1995T/1J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TEA1995T/1J is usually 5 days.
3.What payment methods are accepted for TEA1995T/1J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TEA1995T/1J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TEA1995T/1J?
TEA1995T/1J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TEA1995T/1J 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 TEA1995T/1J?
For technical support, including TEA1995T/1J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TEA1995T/1J requirements.
6.How does Aetrix verify that TEA1995T/1J is sourced from the original manufacturer or authorized distributors?
All TEA1995T/1J 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 TEA1995T/1J meets industry standards.
7.What is the process for return or replacement of TEA1995T/1J?
All TEA1995T/1J units undergo pre-shipment inspection (PSI). If there is an issue with TEA1995T/1J, 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 TEA1995T/1J part is unused and in its original packaging.
Return procedure for TEA1995T/1J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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