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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Supply Controllers, Monitors

NXP Semiconductors TEA1999TS/2Z

Name: TEA1999TS/2Z
Brand: NXP Semiconductors
SKU: TEA1999TS/2Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TEA1999TS/2Z

Manufacturer:: NXP Semiconductors

Category:: Power Supply Controllers, Monitors

Package:: SC-74, SOT-457

Datasheet:: TEA1999TS/2Z.pdf

Description:: FLYBACK SR

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TEA1999TS/2 from NXP Semiconductors is a GreenChip synchronous rectifier (SR) controller IC for flyback SMPS secondary-side operation, featuring adaptive gate drive, drain-source differential sensing (−470 mV activation), 25 mV regulation voltage, and self-supply capability down to 0 V output. It drives external SR MOSFETs in high-efficiency USB BC/QuickCharge adapters and low-voltage battery chargers.

For engineers reviewing the TEA1999TS/2 datasheet, TEA1999TS/2 pinout, TEA1999TS/2 application, or TEA1999TS/2 equivalent, key selection considerations include its TSOP6 package, 120 V drain sense rating, 0.7 A source / 0.5 A sink gate driver, UVLO with active pull-down, and support for both low-side and high-side rectification without auxiliary winding.

Technical Context

The TEA1999TS/2 implements a dual-stage sensing architecture: DRAIN and SOURCE pins measure the SR MOSFET's V_DS to trigger and regulate conduction, with −470 mV turn-on threshold and precise 25 mV regulation target. Its adaptive gate drive dynamically adjusts gate voltage (4.7–10.7 V) based on XV pin configuration and CAP voltage.

Startup relies on DRAIN-pin charging (15 mA typical) until CAP reaches 3.7 V, then transitions to XV or DRAIN-based charging with up to 125 mA. Under UVLO (<3.6 V), GATE is actively pulled low via 3.2 Ω internal resistance; overtemperature protection activates at 165 °C with 20 °C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Range (XV)	0–21 V - Enables direct connection to output rail for logic-level MOSFETs or ground for 10 V regulation.
Drain Sense Voltage	−0.8 to +120 V - Supports high-side rectification and withstands flyback voltage spikes without clamping.
V_DS Activation Threshold	−470 mV (typ) - Ensures reliable turn-on even with MOSFET R_DS(on) drift and PCB trace resistance.
Regulation Voltage	−25 mV (typ) - Maintains constant current through SR MOSFET during conduction for minimal loss.
Gate Drive Strength	0.7 A source / 0.5 A sink - Delivers fast switching (≤40 ns delay) for <1.5 μs minimum on-time compliance.
UVLO Threshold	3.7 V start / 3.6 V stop - Prevents erratic operation during brown-out while enabling low-power startup from DRAIN.
Thermal Shutdown	165 °C activation - Protects against gate driver overload, short-circuit, or excessive ambient temperature.

Pinout & Package

TEA1999TS/2 is housed in a TSOP6 (SOT457) plastic surface-mount package: 2.7 mm × 3.1 mm footprint, 1.1 mm height, 6-lead single-row layout optimized for thermal dissipation and high-frequency layout integrity.

Pin/Terminal	Circuit Role	Design Meaning
CAP (1)	Internal supply capacitor node	Stores energy for IC operation; charged via DRAIN (startup) or XV/CAP regulator; sets max gate voltage (≤10.7 V).
GND (2)	Reference ground	Common return for all analog sensing and digital logic; requires low-inductance connection to minimize noise coupling.
XV (3)	External supply input	Selects gate drive voltage: grounded → 10 V; tied to output → regulated to XV level (min 4.7 V); enables self-supply mode.
GATE (4)	SR MOSFET gate driver output	Delivers 0.7 A peak source / 0.5 A sink; includes 3.2 Ω active pull-down for fast, controlled turn-off.
SOURCE (5)	SR MOSFET source sense input	Direct Kelvin connection point to MOSFET source; eliminates PCB trace IR drop error in V_DS measurement.
DRAIN (6)	SR MOSFET drain sense input	High-voltage input (up to 120 V) that initiates turn-on when V_DS goes negative; also supplies CAP during startup.

Key Features

Feature	Design Value
Adaptive gate drive	Adjusts output voltage (4.7–10.7 V) based on XV pin state to optimize R_DS(on) across MOSFET types.
Self-supply capability	Operates without auxiliary winding in high-side or sub-4.7 V output applications using DRAIN/CAP charging.
Drain-source differential sensing	Uses dedicated SOURCE pin for Kelvin sensing, eliminating PCB trace voltage error in V_DS detection.
Active UVLO gate pull-down	Forces GATE low during undervoltage (CAP <3.6 V), preventing partial turn-on and MOSFET overheating.
Minimum conduction time	1.4 μs (typ) prevents false turn-off due to switching noise or zero-current crossing ambiguity.

Applications

USB PD & QuickCharge Adapters	Low-Voltage Battery Chargers
Use Scenario: 20–100 W AC-DC adapters supporting USB Power Delivery and Qualcomm QuickCharge protocols with variable 5–20 V output. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier controller managing SR MOSFET conduction timing and gate voltage to replace output diode. Use Value: Achieves >94% efficiency at light load by eliminating diode forward drop and enabling adaptive regulation down to 0 V output.	Use Scenario: Single-cell Li-ion/Li-polymer chargers with 3.0–4.5 V output, including portable medical devices and wearables. IC Role / Device Role / Timing Role: Self-powered SR controller operating directly from low-output rail without auxiliary winding or bias supply. Use Value: Reduces BOM count and board area by eliminating discrete bias circuitry while maintaining <250 μA no-load current.
High-Side Flyback Supplies	Efficiency-Critical Industrial Adapters
Use Scenario: Isolated flyback converters where SR MOSFET is placed on transformer primary side (high-side configuration). IC Role / Device Role / Timing Role: Synchronous rectifier controller powered solely from DRAIN/CAP, eliminating need for isolated auxiliary supply. Use Value: Enables compact, cost-effective high-side SR implementation with full 120 V drain tolerance and fast 40 ns turn-off response.	Use Scenario: Industrial wall adapters and embedded power modules requiring >90% efficiency across 10–100% load range. IC Role / Device Role / Timing Role: Adaptive SR controller optimizing gate drive strength and regulation voltage to maintain low conduction loss at all loads. Use Value: Delivers consistent 25 mV V_DS regulation and <1.5 μs minimum on-time to prevent efficiency collapse at light loads.

USB PD & QuickCharge Adapters

Low-Voltage Battery Chargers

Use Scenario: 20–100 W AC-DC adapters supporting USB Power Delivery and Qualcomm QuickCharge protocols with variable 5–20 V output.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier controller managing SR MOSFET conduction timing and gate voltage to replace output diode.

Use Value: Achieves >94% efficiency at light load by eliminating diode forward drop and enabling adaptive regulation down to 0 V output.

Use Scenario: Single-cell Li-ion/Li-polymer chargers with 3.0–4.5 V output, including portable medical devices and wearables.

IC Role / Device Role / Timing Role: Self-powered SR controller operating directly from low-output rail without auxiliary winding or bias supply.

Use Value: Reduces BOM count and board area by eliminating discrete bias circuitry while maintaining <250 μA no-load current.

High-Side Flyback Supplies

Efficiency-Critical Industrial Adapters

Use Scenario: Isolated flyback converters where SR MOSFET is placed on transformer primary side (high-side configuration).

IC Role / Device Role / Timing Role: Synchronous rectifier controller powered solely from DRAIN/CAP, eliminating need for isolated auxiliary supply.

Use Value: Enables compact, cost-effective high-side SR implementation with full 120 V drain tolerance and fast 40 ns turn-off response.

Use Scenario: Industrial wall adapters and embedded power modules requiring >90% efficiency across 10–100% load range.

IC Role / Device Role / Timing Role: Adaptive SR controller optimizing gate drive strength and regulation voltage to maintain low conduction loss at all loads.

Use Value: Delivers consistent 25 mV V_DS regulation and <1.5 μs minimum on-time to prevent efficiency collapse at light loads.

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	Fixed 5.5 V gate drive; no XV pin for voltage selection; 100 V drain rating; no self-supply mode.	Requires auxiliary winding or separate bias supply; limited to low-to-mid voltage outputs (≥5 V).	Choose when design uses standard 5 V logic-level MOSFETs and auxiliary winding is available.
Infineon IRS11682PBF	Higher 150 V drain rating; integrated bootstrap diode; supports resonant LLC topologies; no SOURCE pin for Kelvin sensing.	Targeted at higher-power (>150 W) and resonant converter designs; less accurate V_DS sensing due to shared source path.	Choose for high-voltage industrial supplies where bootstrap operation and extended voltage range outweigh precision sensing needs.

Compared with NCP4307DR2G and IRS11682PBF, TEA1999TS/2 uniquely combines self-supply operation, selectable gate voltage via XV pin, dedicated SOURCE sensing for accuracy, and 120 V drain tolerance-making it optimal for compact, low-output-voltage, and high-side flyback designs where auxiliary windings are impractical.

Availability

TEA1999TS/2 is available at Aetrix Electronics and suitable for USB BC/QuickCharge adapters, low-voltage battery chargers, and high-side flyback power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for TEA1999TS/2 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, automotive processors, and high-efficiency power management ICs.

The TEA1999TS/2 belongs to NXP's GreenChip family of energy-efficient power conversion controllers, designed specifically to maximize efficiency in AC-DC adapters, chargers, and offline SMPS by replacing lossy diodes with precisely timed synchronous rectification.

FAQ

What is the function of the XV pin on the TEA1999TS/2?

The XV pin on the TEA1999TS/2 selects the gate driver output voltage level: grounding XV configures the driver for 10 V operation (suitable for standard SR MOSFETs), while connecting XV to the output rail regulates gate voltage to match the rail (minimum 4.7 V), enabling use with logic-level MOSFETs. This flexibility allows TEA1999TS/2 to drive diverse MOSFET types without external components.

Can TEA1999TS/2 operate without an auxiliary winding?

Yes, TEA1999TS/2 can operate without an auxiliary winding. It supports self-supply operation using the DRAIN pin to charge the CAP capacitor during startup and steady-state, making it suitable for high-side rectification and low-output-voltage (<4.7 V) battery charging applications where auxiliary windings are impractical or space-constrained.

How does TEA1999TS/2 ensure accurate V_DS sensing despite PCB parasitics?

TEA1999TS/2 ensures accurate V_DS sensing by providing separate SOURCE and DRAIN pins for Kelvin connection directly to the SR MOSFET terminals. This eliminates voltage errors caused by PCB trace resistance and inductance during high dI/dt switching, allowing precise −470 mV turn-on detection and stable 25 mV regulation-critical for maintaining efficiency across load conditions.

What protection features are integrated into TEA1999TS/2?

TEA1999TS/2 integrates UnderVoltage LockOut (UVLO) with active gate pull-down below 3.6 V, overtemperature protection triggering at 165 °C with 20 °C hysteresis, and a 3.2 Ω gate pull-down resistor to force fast, controlled SR MOSFET turn-off when drain voltage exceeds 250 mV. These features prevent device damage and ensure robust operation under fault conditions.

Is TEA1999TS/2 compatible with both low-side and high-side SR configurations?

Yes, TEA1999TS/2 is fully compatible with both low-side and high-side synchronous rectification configurations. Its self-supply capability, 120 V drain sense rating, and flexible XV pin enable reliable operation in either topology-eliminating the need for separate controller variants and simplifying design reuse across adapter and charger platforms.

TEA1999TS/2Z 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:: Active/Synchronous Rectification Controller

Voltage - Input:: -

Voltage - Supply:: 0V ~ 21V

Current - Supply:: 250 µA

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-74

TEA1999TS/2Z FAQ

1.How can I place an order for TEA1999TS/2Z through Aetrix?

Please submit a Request for Quotation (RFQ) for TEA1999TS/2Z 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 TEA1999TS/2Z reliable?

The price and inventory of TEA1999TS/2Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TEA1999TS/2Z is usually 5 days.

3.What payment methods are accepted for TEA1999TS/2Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TEA1999TS/2Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TEA1999TS/2Z?

TEA1999TS/2Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TEA1999TS/2Z 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 TEA1999TS/2Z?

For technical support, including TEA1999TS/2Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TEA1999TS/2Z requirements.

6.How does Aetrix verify that TEA1999TS/2Z is sourced from the original manufacturer or authorized distributors?

All TEA1999TS/2Z 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 TEA1999TS/2Z meets industry standards.

7.What is the process for return or replacement of TEA1999TS/2Z?

All TEA1999TS/2Z units undergo pre-shipment inspection (PSI). If there is an issue with TEA1999TS/2Z, 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 TEA1999TS/2Z part is unused and in its original packaging.

Return procedure for TEA1999TS/2Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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