NXP Semiconductors TEA1532AT/N1/DG,11

Overview

TEA1532AT/N1/DG,11 from NXP Semiconductors (formerly Philips) is a GreenChip™II primary-side quasi-resonant flyback SMPS controller IC for universal-input AC/DC adapters and chargers. It supports QR-DCM, fixed-frequency CCM, and cycle-skipping standby modes; delivers <300 mW no-load input power; integrates high-voltage BCD800 start-up; and enables compact, cost-effective 250 W-class supplies.

For engineers reviewing the TEA1532AT/N1/DG,11 datasheet, TEA1532AT/N1/DG,11 pinout, TEA1532AT/N1/DG,11 application, or TEA1532AT/N1/DG,11 equivalent, key selection considerations include valley-switching timing accuracy, programmable OCP via Rsense, PROTECT pin latched/safe-restart behavior (TEA1532AT variant), soft-start control via SENSE, and SO8 package thermal limits (Rth(j-a) = 150 K/W).

Technical Context

The TEA1532AT/N1/DG,11 implements multi-mode operation: QR-DCM with valley detection (drain voltage minima triggering), fixed-frequency CCM (DEM grounded), and cycle-skipping at light load. Its internal oscillator sets 50–75 kHz fixed frequency; on-time is controlled by Vsense vs. CTRL voltage (1.0–1.5 V range), with slope compensation active in CCM to prevent sub-harmonic oscillation.

Protection architecture includes latched OTP (140 °C trip), brown-out detection via DEM current (−60 µA typical), undervoltage lockout (VUVLO = 8.7 V), and cycle-by-cycle OCP with 400 ns leading-edge blanking. The PROTECT pin operates in safe-restart mode when CTRL < 0.63 V and latched mode when CTRL > 0.63 V - a defining feature of the "AT" variant.

Key Specifications

Pinout & Package

TEA1532AT/N1/DG,11 is housed in an SO8 package (SOT96-1): plastic small outline, 8 leads, 3.9 mm body width, surface-mount compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TEA1532AT/N1/DG,11, TEA1533T offers simplified protection but loses adaptive PROTECT logic, while ICE2QS03G reduces external parts at the cost of design flexibility and direct replacement feasibility.

Availability

TEA1532AT/N1/DG,11 is available at Aetrix Electronics and suitable for printer adapters, laptop chargers, LED driver power supplies, and industrial control power modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for TEA1532AT/N1/DG,11 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.

The TEA1532AT/N1/DG,11 belongs to the GreenChip™II family of energy-efficient SMPS controllers, designed specifically for cost-sensitive, high-efficiency AC/DC power conversion up to 250 W in universal-input applications.

FAQ

What is the function of the PROTECT pin on the TEA1532AT/N1/DG,11?

The PROTECT pin on the TEA1532AT/N1/DG,11 serves dual protection roles: it triggers safe-restart mode when CTRL voltage is below 0.63 V (e.g., open-loop fault), and latched shutdown when CTRL exceeds 0.63 V (e.g., regulated OVP/OTP). This adaptive behavior is unique to the "AT" variant and eliminates need for external logic to distinguish fault types. TEA1532AT/N1/DG,11 uses this pin for overvoltage, output short-circuit, or system overtemperature protection.

How does the TEA1532AT/N1/DG,11 achieve <300 mW no-load input power?

The TEA1532AT/N1/DG,11 achieves <300 mW no-load input power through coordinated operation of cycle-skipping mode and valley-switching QR control. At ultra-light loads, the IC skips entire switching cycles until the internal Vsense(max) voltage rises above 25 mV. Combined with precise valley detection minimizing switching losses and low quiescent current (1.3 mA typical), this ensures minimal energy draw during standby. TEA1532AT/N1/DG,11 implements this without auxiliary bias winding dependency post-startup.

What is the maximum continuous power capability of the TEA1532AT/N1/DG,11 in SO8 package?

The TEA1532AT/N1/DG,11 in SO8 package has a maximum continuous power dissipation of 0.5 W at Tamb < 70 °C, corresponding to Rth(j-a) = 150 K/W. In practical 250 W-class flyback designs, this thermal limit constrains continuous output power to ~65–90 W depending on layout, heatsinking, and ambient conditions. TEA1532AT/N1/DG,11 is rated for peak 250 W operation but requires careful thermal design for sustained high-power delivery in SO8 form factor.

Can the TEA1532AT/N1/DG,11 operate in fixed-frequency CCM mode, and how is it enabled?

Yes, the TEA1532AT/N1/DG,11 supports fixed-frequency Continuous Conduction Mode (CCM) operation. It is enabled by grounding the DEM pin (Pin 5), which disables demagnetization detection and activates the internal oscillator to determine switching frequency (50–75 kHz). In CCM mode, the duty cycle is limited to 70%, and slope compensation via the CTRL pin is required to prevent sub-harmonic oscillation. TEA1532AT/N1/DG,11 maintains brown-out protection via duty-cycle limiting rather than DEM current sensing in this configuration.

What is the role of the SENSE pin and how is OCP set on the TEA1532AT/N1/DG,11?

The SENSE pin (Pin 6) on the TEA1532AT/N1/DG,11 measures primary current via an external sense resistor (Rsense) and compares it to an internal 0.52 V threshold to trigger cycle-by-cycle OverCurrent Protection. OCP trip level is set by Rsense = 0.52 V / I_peak; for example, 0.1 Ω yields 5.2 A peak current. Leading-edge blanking (400 ns) prevents false triggering from switch-on spikes. TEA1532AT/N1/DG,11 also uses this pin for soft-start via external RC network controlling inrush current ramp rate.