NXP Semiconductors TEA19161T/1Y

Overview

TEA19161T/1Y from NXP Semiconductors is a fully digital LLC resonant controller IC for high-efficiency AC-DC power supplies, operating up to 500 kHz with primary capacitor voltage (VCr) regulation, integrated high-voltage start-up, and three-mode operation (high-power/low-power/burst). It delivers <75 mW no-load input power in combination with TEA19162T and TEA1995T, targeting 90–500 W desktop, LCD TV, and notebook adapter applications.

For engineers reviewing the TEA19161T/1Y datasheet, TEA19161T/1Y pinout, TEA19161T/1Y application, or TEA19161T/1Y equivalent, key selection considerations include VCr-based power regulation accuracy, externally adjustable mode transition thresholds, integrated SOI-based high-side driver and level shifter, adaptive non-overlap timing, and compliance with Energy Star, DoE Level VI, and EU Eco-design directives.

Technical Context

The TEA19161T/1Y implements a unique primary capacitor voltage (VSNSCAP)-based control loop instead of conventional frequency modulation, enabling linear output power estimation via ΔVCr and eliminating load-dependent burst activation drift. Its dual-die architecture integrates a low-voltage digital controller (for power regulation, mode sequencing, and protections) and a high-voltage SOI controller (for HV start-up, gate driving, and level shifting).

It supports coordinated operation with TEA19162T PFC via digital interface for synchronized burst mode entry and fast latch reset, while real-time monitoring of SNSCUR, SNSCAP, and SNSBOOST enables precise OCP, CMR, OPP, and capacitive mode protection without external comparators.

Key Specifications

Pinout & Package

TEA19161T/1Y is housed in a 16-pin plastic small outline package (SO16, SOT109-3) with 3.9 mm body width and 1.47 mm thickness, optimized for surface-mount assembly and thermal performance in high-density power stages.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LLC resonant controller applications.

Compared with UCC256301 and ICE2HS01G, TEA19161T/1Y delivers superior light-load efficiency through VCr-based power estimation and seamless three-mode operation, while its digital PFC interface and integrated SOI drivers reduce external component count and improve system-level robustness in 90–500 W applications.

Availability

TEA19161T/1Y is available at Aetrix Electronics and suitable for desktop PC power supplies, LCD television PSUs, and notebook adapters requiring stable component supply, regulatory compliance (DoE Level VI, EU Eco-design), and ultra-low no-load power.

Supply support for TEA19161T/1Y 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 leader specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with deep expertise in power management ICs and digital control architectures.

The TEA19161T/1Y belongs to NXP's TEA19xx digital resonant controller family, designed specifically for high-efficiency, low-component-count LLC power supplies targeting Energy Star, DoE, and EU Eco-design compliance in 90–500 W applications.

FAQ

What is the primary regulation method used by the TEA19161T/1Y?

The TEA19161T/1Y uses primary resonant capacitor voltage (VSNSCAP) sensing-not frequency modulation-to regulate output power. By measuring the voltage difference (ΔVCr) across the LLC resonant capacitor, it calculates delivered power linearly per Equation 1 in the datasheet. This enables precise, load-independent burst mode activation and eliminates efficiency drift caused by resonant component tolerances, a key advantage over traditional frequency-controlled LLC controllers like the UCC256301.

How does the TEA19161T/1Y achieve <75 mW no-load input power?

The TEA19161T/1Y achieves <75 mW no-load input power (system-level with TEA19162T and TEA1995T) through three integrated features: regulated 85 µA optocurrent to minimize TL431 bias loss, ultra-low quiescent current in burst mode, and elimination of auxiliary supplies via HV start-up and VCr-based regulation. Its low-power mode further reduces magnetization losses by introducing a controlled "hold" period, directly contributing to sub-100 mW system no-load performance required by EU CoC Tier 2.

What protection functions are integrated into the TEA19161T/1Y?

The TEA19161T/1Y integrates OverCurrent Protection (OCP), OverVoltage Protection (OVP), Supply UnderVoltage Protection (UVP), On-chip OverTemperature Protection (OTP), Capacitive Mode Regulation (CMR), OverPower Protection (OPP) with adjustable timeout, and maximum on-time limiting for both high-side and low-side drivers. These are implemented entirely on-die-no external comparators or timers are needed-ensuring fast, coordinated fault response and simplifying safety-critical PSU design for IEC 62368-1 compliance.

Can the TEA19161T/1Y operate without the TEA19162T PFC controller?

Yes, the TEA19161T/1Y can operate standalone with an external PFC stage or non-PFC front-end, but its digital control interface, burst synchronization logic, and optimized start-up sequence are specifically designed for seamless integration with the TEA19162T. Using TEA19162T enables coordinated burst entry, fast latch reset, and shared protection signaling-critical for achieving <75 mW no-load power and full regulatory compliance. Standalone use requires external implementation of these functions.

What package type and pin count does the TEA19161T/1Y use?

The TEA19161T/1Y uses a 16-pin plastic small outline package (SO16) conforming to SOT109-3 mechanical dimensions: 3.9 mm body width, 1.47 mm body thickness, and standard 1.27 mm pitch. This RoHS-compliant package supports automated SMT assembly and provides adequate thermal dissipation for continuous operation in 90–500 W resonant power supplies.