NXP Semiconductors TEA1721ADB1061,598

Overview

TEA1721ADB1061,598 from NXP is a GreenChip SMPS controller IC with integrated 700 V high-voltage MOSFET, designed for primary-side regulated flyback converters up to 5 W. It delivers <10 mW no-load power consumption, ±5% CV and ±10% CC regulation accuracy, and operates with variable switching frequency up to 50.5 kHz-targeting USB battery chargers and low-power industrial adapters.

For engineers reviewing the TEA1721ADB1061,598 datasheet, TEA1721ADB1061,598 pinout, TEA1721ADB1061,598 application, or TEA1721ADB1061,598 equivalent, key selection factors include primary-side sensing architecture, EEPROM-programmable burst frequency (430 Hz), cable impedance compensation (0 Ω), SO-7 HV-spaced package, and Energy Star 2.0/USB BC 1.2 compliance.

Technical Context

The TEA1721ADB1061,598 implements primary-side regulation using demagnetization detection and internal voltage reference, eliminating optocoupler and secondary feedback circuitry. Its control loop integrates adaptive burst-mode operation, jittered switching for EMI reduction, and soft-start via peak current limiting.

It features high-voltage start-up directly from rectified mains, zero-current switching during normal operation, and comprehensive protection including OVP with auto-restart, UVLO, OTP, FB open/short detection, and demagnetization monitoring to enforce DCM operation.

Key Specifications

Pinout & Package

TEA1721ADB1061,598 is housed in a halogen-free, RoHS-compliant SO-7 package with high-voltage spacing between drain and source pins for reinforced insulation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TEA1721AT,598, TEA1721ADB1061,598 offers identical functionality and sourcing pedigree; versus TEA1721A1T,598, it removes unnecessary cable compensation overhead-reducing design complexity and improving CV accuracy in fixed-cable use cases.

Availability

TEA1721ADB1061,598 is available at Aetrix Electronics and suitable for mobile USB chargers, smart meter auxiliary supplies, and white goods control power applications requiring stable component supply, long-lifecycle support, and full regulatory compliance documentation.

Supply support for TEA1721ADB1061,598 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 energy-efficient power management ICs.

The TEA172x family was developed to enable ultra-low standby, cost-optimized AC/DC conversion for sub-11 W applications-specifically targeting USB charging, smart metering, and appliance auxiliary power where BOM reduction and regulatory compliance are critical.

FAQ

What is the maximum continuous output power supported by the TEA1721ADB1061,598?

The TEA1721ADB1061,598 is rated for continuous operation up to 5 W in flyback topology. This limit is defined by thermal constraints of its integrated 700 V MOSFET and internal current sense threshold. Exceeding 5 W risks thermal shutdown or reduced reliability. Design margin should be maintained per NXP Application Note AN11235, which specifies derating curves for ambient temperature and PCB copper area.

Does the TEA1721ADB1061,598 require an external optocoupler for feedback?

No, the TEA1721ADB1061,598 uses primary-side regulation based on demagnetization timing and auxiliary winding voltage sampling-eliminating the need for an optocoupler, TL431, or secondary-side feedback network. This reduces component count, improves reliability, and lowers system cost. The FB pin connects directly to the auxiliary winding, and regulation accuracy remains ±5% CV without secondary sensing.

How does the TEA1721ADB1061,598 achieve <10 mW no-load power consumption?

The TEA1721ADB1061,598 achieves <10 mW no-load power through integrated high-voltage start-up (no bleeder resistor), adaptive burst-mode operation at 430 Hz, and deep sleep state activation below 10 mW load. Its internal logic disables gate drive and reduces bias currents while maintaining fast wake-up capability. Measured at 230 VAC input, this performance exceeds Energy Star 2.0 and EU CoC Tier 2 requirements.

What protection features are integrated into the TEA1721ADB1061,598?

The TEA1721ADB1061,598 integrates OverVoltage Protection (OVP) with auto-restart, UnderVoltage LockOut (UVLO), OverTemperature Protection (OTP), FB open/short detection, demagnetization monitoring for DCM enforcement, and soft-start via peak current limiting. All protections trigger safe shutdown or controlled recovery-no external circuitry is needed for basic fault coverage in certified designs.

Is the TEA1721ADB1061,598 pin-compatible with other TEA172x variants like TEA1723AT?

No, the TEA1721ADB1061,598 is not pin-compatible with TEA1723AT. While both use SO-7 packages, the TEA1723AT is rated for 11 W and uses a higher-current integrated MOSFET with different internal current sense scaling and thermal design. Pin assignments match within the TEA1721x subfamily (e.g., TEA1721AT, TEA1721A1T), but cross-family substitution requires full revalidation of transformer, snubber, and protection thresholds.