STMicroelectronics VIPER0PHDTR

Overview

VIPER0PHDTR from STMicroelectronics is a zero-power-mode (ZPM) off-line high-voltage converter integrating an 800 V avalanche-rugged N-channel MOSFET, current-mode PWM controller, embedded HV startup and sense-FET, and self-supply capability. It delivers up to 12 W in open-frame designs at 230 VAC, supports flyback/buck/buck-boost topologies, and achieves <4 mW no-load input power at 230 VAC - enabling compliance with stringent energy-saving standards for smart home and industrial power supplies.

For engineers reviewing the VIPER0PHDTR datasheet, VIPER0PHDTR pinout, VIPER0PHDTR application, or VIPER0PHDTR equivalent, this device is selected for ultra-low standby power, integrated ZPM management via MCU-controlled ON/OFF pins, jittered 120 kHz ±7% switching for EMI reduction, and direct negative-output regulation using its separate EAGND-referenced error amplifier.

Technical Context

The VIPER0PHDTR implements a fixed-frequency current-mode PWM controller with built-in oscillator jitter (±7% at 260 Hz) to spread spectral energy and reduce conducted EMI filter size. Its 800 V MOSFET enables operation across 85–265 VAC inputs without external snubber scaling, while the integrated HV startup current source (ICH3 = 7.8 mA typ.) enables self-supply mode without auxiliary winding.

ZPM is managed through dedicated ON/OFF pins with internal pull-up resistors (41 kΩ typ.), debounce timing (tDEB_OFF = 16 ms, tDEB_ON = 35 µs), and threshold voltages (VOFFth = 1 V, VONth = 1 V). The transconductance error amplifier features a 1.2 V reference (±25 mV), separate EAGND, and COMP output driving peak-current setpoint - supporting both primary-side regulation and secondary-side optocoupler feedback.

Key Specifications

Pinout & Package

Package: SO16 narrow (SO16N), thermally enhanced with DRAIN pins (13–16) connected to internal metal PAD for PCB copper-area heat sinking (RthJA = 80 °C/W on 100 mm² FR4).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage offline SMPS controller applications.

Compared with ICE2QS03G and LNK364PG, VIPER0PHDTR uniquely combines ZPM, self-supply, EAGND-based negative regulation, and 800 V ruggedness - making it the only option for smart appliances requiring sub-10 mW standby, MCU-coordinated sleep, and flexible topology support.

Availability

VIPER0PHDTR is available at Aetrix Electronics and suitable for smart home power supplies, industrial sensor node PSUs, LED drivers for smart lighting, and appliance control board power conversion requiring stable component supply, long lifecycle assurance, and consistent parametric performance across production batches.

Supply support for VIPER0PHDTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for automotive, industrial, and consumer markets.

VIPER0PHDTR belongs to the VIPer0P zero-power off-line high-voltage converter product line, engineered specifically for energy-efficient AC-DC conversion in smart, always-on electronic systems where ultra-low standby power and MCU-integrated power management are mandatory.

FAQ

What is the maximum continuous output power achievable with VIPER0PHDTR in an open-frame design?

VIPER0PHDTR delivers up to 12 W continuous output power at 230 VAC ambient temperature of 50 °C in open-frame configurations with adequate PCB copper heatsinking under the DRAIN pins. This rating assumes proper layout, SO16N thermal resistance of 80 °C/W, and operation within absolute maximum junction temperature (150 °C). Derating is required above 50 °C ambient or in enclosed adapters.

How does the self-supply mode eliminate the need for an auxiliary winding?

In self-supply mode, the internal HV current source (ICH3 = 7.8 mA typ.) recharges the VCC capacitor during the MOSFET OFF time, eliminating reliance on transformer auxiliary windings. This is enabled by connecting only a single capacitor between VCC and SGND - reducing BOM count, transformer complexity, and cost while maintaining stable operation across load and line variations.

Can VIPER0PHDTR regulate a negative output voltage without an optocoupler?

Yes - by connecting EAGND to the negative output rail and feeding the FB pin directly from a resistor divider referenced to that rail, the integrated error amplifier regulates negative voltage with 1.2 V precision. This configuration bypasses the need for optocouplers or secondary-side references, simplifying non-isolated buck or flyback designs targeting -5 V or -12 V rails.

What protection mechanisms prevent flux runaway during startup or output short-circuit?

VIPER0PHDTR prevents flux runaway via three coordinated protections: (1) pulse-skip circuitry that disables switching cycles when peak drain current exceeds 400 mA within minimum on-time (230 ns), (2) max duty cycle limiting to 80%, and (3) automatic restart after 1 s following thermal or OLP shutdown. These act together to enforce volt-second balance and avoid core saturation under fault conditions.