NXP Semiconductors TEA1532T/N1,118

Overview

TEA1532T/N1,118 from NXP Semiconductors (formerly Philips) is a GreenChip™II primary-side quasi-resonant flyback SMPS controller IC for universal-input AC/DC power supplies up to 250 W. It integrates high-voltage start-up, valley-switching detection, cycle-skipping standby mode (<300 mW no-load), and multi-mode operation (QR-DCM, FF-CCM, and cycle-skip). It targets compact, cost-effective adapters and chargers requiring high efficiency across full load range.

For engineers reviewing the TEA1532T/N1,118 datasheet, TEA1532T/N1,118 pinout, TEA1532T/N1,118 application, or TEA1532T/N1,118 equivalent, key selection considerations include its SO8 package, 63 kHz fixed-frequency capability in CCM, 25 µs maximum on-time limit in QR mode, integrated brown-out protection via DEM pin, and latched overtemperature protection with 4.5 V reset threshold.

Technical Context

The TEA1532T/N1,118 operates as a primary-side controller in flyback topologies, using demagnetization sensing on pin DEM to enable valley-switched quasi-resonant operation. Its internal BCD800 process enables direct high-voltage start-up from rectified mains (70–276 V_AC) via pin DRAIN, while auxiliary winding feedback powers the IC post-startup.

It supports three operational modes: QR-DCM (valley-triggered switching with zero-voltage turn-on), FF-CCM (fixed 50–75 kHz PWM enabled by grounding DEM), and cycle-skipping at light loads. Protection includes latched OTP (140 °C trip), undervoltage lockout (8.7 V UVLO, 11 V start), and adjustable OCP via external Rsense with 400 ns leading-edge blanking.

Key Specifications

Pinout & Package

TEA1532T/N1,118 is housed in an SO8 package (SOT96-1), 3.9 mm body width, surface-mount plastic small outline package with 8 leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2QS03G and UCC28632D, the TEA1532T/N1,118 uniquely combines latched OTP reset behavior, DEM-based brown-out protection, and integrated HV start-up in SO8 - making it optimal for cost-sensitive, safety-critical adapter designs requiring guaranteed fault recovery.

Availability

TEA1532T/N1,118 is available at Aetrix Electronics and suitable for printer adapters, USB-C chargers, and industrial SMPS modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TEA1532T/N1,118 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in power management IP from its Philips acquisition.

The TEA1532T/N1,118 belongs to the GreenChip™II family - designed specifically for high-efficiency, low-component-count AC/DC flyback converters targeting energy-efficient consumer and industrial power supplies up to 250 W.

FAQ

What is the maximum continuous output power supported by the TEA1532T/N1,118?

The TEA1532T/N1,118 is rated for flyback converter designs up to 250 W, as confirmed in the official Philips product data sheet (Rev. 02, 2005). This rating assumes proper thermal management in the SO8 package, use of valley switching in QR mode, and adherence to the 25 µs maximum on-time limit and 70% duty-cycle constraint in CCM mode. Real-world designs typically achieve 150–220 W reliably.

Does the TEA1532T/N1,118 support both quasi-resonant and fixed-frequency operation?

Yes, the TEA1532T/N1,118 supports dual-mode operation: quasi-resonant discontinuous conduction mode (QR-DCM) using DEM pin sensing for valley switching, and fixed-frequency continuous conduction mode (FF-CCM) activated by grounding the DEM pin. In FF-CCM, the oscillator runs at 50–75 kHz (typ. 63 kHz), with duty cycle limited to 70% to ensure safe operation at low input voltages.

How does the TEA1532T/N1,118 implement overtemperature protection?

The TEA1532T/N1,118 features latched overtemperature protection (OTP) that triggers at 140 °C junction temperature. Once tripped, the IC halts switching and holds shutdown until pin VCC drops below 4.5 V - which occurs only when mains power is removed. This prevents automatic restart under thermal fault conditions and complies with safety standards requiring defined reset behavior.

What is the purpose of the PROTECT pin on the TEA1532T/N1,118?

The PROTECT pin (Pin 3) serves as a multi-function input for latched protection and timing. At >2.5 V, it disables switching immediately; at >3 V, it forces permanent latch regardless of other conditions. With a 50 µA internal current source, it can charge an external capacitor to implement timed OVP or system-level OTP - a feature critical for meeting IEC 62368-1 fault management requirements in the TEA1532T/N1,118.

Can the TEA1532T/N1,118 be used in continuous conduction mode without modifying the transformer?

Yes, the TEA1532T/N1,118 supports fixed-frequency CCM operation by grounding the DEM pin and connecting DRAIN to the rectified input. However, the transformer must be redesigned for CCM - requiring larger core size, adjusted turns ratio, and careful attention to leakage inductance to avoid instability. The IC's built-in slope compensation on CTRL pin helps maintain stability at duty cycles >50% in this mode.