NXP Semiconductors TEA1723FT/N1,118

Overview

TEA1723FT/N1,118 from NXP Semiconductors is a high-voltage flyback SMPS controller IC with integrated 700 V power MOSFET, designed for universal-input AC/DC adapters up to 11 W. It delivers primary-side regulated voltage and current output using burst-mode (1750 Hz) and CV/CC operating modes, enabling <53 mW no-load power consumption at 230 V_AC and eliminating optocoupler-based feedback.

For engineers reviewing the TEA1723FT/N1,118 datasheet, TEA1723FT/N1,118 pinout, TEA1723FT/N1,118 application, or TEA1723FT/N1,118 equivalent, key selection criteria include integrated HV switch capability, SO7 package compatibility, primary-sensing accuracy (V_ref = 2.55 V), burst-mode EMI suppression, and thermal shutdown threshold at 150 °C.

Technical Context

The TEA1723FT/N1,118 implements a three-mode control architecture: Constant Voltage with Burst (CVB) below ~10% load, Constant Voltage (CV) from 10–100% load, and Constant Current (CC) during output short-circuit or low-V_OUT conditions. Each mode uses distinct VSOURCE regulation (0.1–0.555 V) and switching frequency ranges (22.5–50.5 kHz).

Its primary-side sensing relies on FB pin sampling of reflected secondary voltage during demagnetization, with dedicated 25–75 mV demag detection threshold and auto-restart OVP (3.2 V typical) on the same pin. Jittered oscillator (7% spread, 200 Hz sweep) operates in CV/CC modes only - not during burst - to reduce conducted EMI without affecting energy-saving operation.

Key Specifications

Pinout & Package

TEA1723FT/N1,118 is housed in a halogen-free, RoHS-compliant SO7 (SOT1175-1) package: plastic small outline, 7 leads, 3.9 mm body width, 1.27 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC28704DR and ICE2QS03G, the TEA1723FT/N1,118 uniquely combines integrated 700 V switching, primary-side regulation, and 1750 Hz burst mode - delivering lowest BOM count and <53 mW no-load power in compact SO7 footprint.

Availability

TEA1723FT/N1,118 is available at Aetrix Electronics and suitable for cellular phone chargers, TV standby supplies, and white goods auxiliary power supplies requiring stable component supply and long-term manufacturability.

Supply support for TEA1723FT/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 Dutch semiconductor company specializing in secure connectivity solutions, automotive processors, and energy-efficient power management ICs.

The TEA1723FT/N1,118 belongs to NXP's GreenChip™ AC/DC controller family, engineered specifically for ultra-low standby power and simplified flyback converter design in sub-15 W consumer and industrial power supplies.

FAQ

What is the maximum continuous output power supported by the TEA1723FT/N1,118?

The TEA1723FT/N1,118 is rated for continuous operation up to 11 W output power across universal AC input (85–265 V_AC). This limit is defined by thermal constraints of the integrated 700 V MOSFET and SO7 package, with R_DS(on) = 4.8 Ω and junction temperature capped at 150 °C. Derating is required above 50 °C ambient per the 136 K/W thermal resistance specification.

Does the TEA1723FT/N1,118 require an external optocoupler for feedback?

No, the TEA1723FT/N1,118 does not require an external optocoupler. It uses primary-side sensing via the FB pin to sample reflected secondary voltage during transformer demagnetization, enabling accurate output voltage regulation without secondary-side components. This eliminates optocoupler aging, gain drift, and associated compensation complexity.

How does the TEA1723FT/N1,118 achieve <53 mW no-load power consumption?

The TEA1723FT/N1,118 achieves <53 mW no-load power consumption through three coordinated mechanisms: (1) HV start-up circuit that draws zero current during normal switching, (2) burst-mode operation at 1750 Hz with extended off-time, and (3) energy-save mode that powers down analog blocks between bursts. All are confirmed in the Rev. 2.1 datasheet under "Green features" and Table 1.

What protection features are built into the TEA1723FT/N1,118?

The TEA1723FT/N1,118 integrates OverVoltage Protection (OVP) on the FB pin with auto-restart, UnderVoltage LockOut (UVLO) on VCC (7.5–9.5 V range), OverTemperature Protection (OTP) at 150 °C with 50 °C hysteresis, demagnetization protection for guaranteed DCM, and open/short-circuit protection on both FB and charger output. These are documented in Section 1.2 and Table 5 of the datasheet.

Is the TEA1723FT/N1,118 compatible with RoHS and halogen-free manufacturing standards?

Yes, the TEA1723FT/N1,118 is manufactured in a halogen-free and RoHS-compliant SO7 (SOT1175-1) package, as explicitly stated in the "Green features" section and Package Outline (Section 9) of the official NXP datasheet Rev. 2.1. Lead finish is matte tin, and all materials meet JEDEC J-STD-020 moisture sensitivity level 3 requirements.