STMicroelectronics VIPER0PLD

Overview

VIPER0PLD from STMicroelectronics is a zero-power-mode (ZPM) off-line high-voltage converter IC 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 home appliances and industrial SMPS.

For engineers reviewing the VIPER0PLD datasheet, VIPER0PLD pinout, VIPER0PLD application, or VIPER0PLD equivalent, this device is selected for ultra-low standby power design, ZPM-controlled system wake-up via MCU, and EMI-reduced 60 kHz ±7% jittered switching - critical for compact, certified AC/DC converters in lighting and smart home equipment.

Technical Context

The VIPER0PLD implements a current-mode PWM architecture with integrated 800 V MOSFET and dedicated sense-FET for lossless primary-side current sensing. Its oscillator provides fixed 60 kHz ±7% spread-spectrum switching, reducing conducted EMI without increasing filter size.

ZPM operation is managed via dedicated ON/OFF pins with 10 ms OFF debounce and 35 µs ON debounce, enabling MCU-driven deep-sleep entry/exit. The embedded error amplifier features a 1.2 V reference referenced to EAGND and separate ground for direct negative-output voltage regulation in non-isolated flyback designs.

Key Specifications

Pinout & Package

Package: SO16 narrow (SO16N), thermally enhanced with DRAIN pins (13–16) connected to internal MOSFET metal pad for PCB copper-area heatsinking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar off-line ZPM-capable SMPS controller applications.

Compared with ICE2QS03G and LNK3206P, VIPER0PLD uniquely integrates ZPM control, self-supply, and EAGND-referenced error amplifier - enabling lower BOM count, sub-5 mW standby, and negative-output capability without optocouplers or auxiliary windings.

Availability

VIPER0PLD 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 PSUs requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for VIPER0PLD 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, and analog/mixed-signal devices for industrial, automotive, and consumer markets.

VIPER0PLD belongs to the VIPerPlus family of zero-power off-line high-voltage converters, engineered specifically for ultra-low-standby AC/DC power conversion in energy-conscious applications such as smart appliances and IoT edge devices.

FAQ

What is the purpose of the EAGND pin in VIPER0PLD?

EAGND serves as the dedicated ground reference for the internal error amplifier, decoupled from signal ground (SGND). In non-isolated flyback designs with negative output voltage, EAGND is connected directly to the negative rail - enabling precise regulation without optocoupler or secondary-side components. When regulating positive outputs, EAGND must be shorted to SGND to maintain correct reference alignment.

How does VIPER0PLD achieve <4 mW no-load input power?

VIPER0PLD achieves sub-4 mW no-load consumption through three integrated mechanisms: zero-power mode (ZPM) with 20 µA quiescent current, self-supply operation eliminating auxiliary winding losses, and pulse-skipping at light loads that reduces switching activity. At 230 VAC, its HV startup current source remains inactive during steady-state, and internal controller current drops to 0.35 mA - collectively enabling compliance with EU CoC Tier 2.

Can VIPER0PLD be used in buck topology without isolation?

Yes - VIPER0PLD supports non-isolated buck converter designs. Its integrated 800 V MOSFET allows direct connection to rectified AC input, while the EAGND pin enables stable regulation of negative output rails. The FB pin accepts direct feedback from output dividers, and COMP drives the current-limit setpoint. Layout must isolate PGND (power return) from SGND (control reference) and provide adequate copper area under DRAIN pins for thermal management.

What protection features are built into VIPER0PLD?

VIPER0PLD integrates six hardware protections: drain overcurrent (OCP) with 400 mA threshold, overload/short-circuit (OLP) with 50 ms delay and auto-restart, max duty-cycle limiting, VCC overvoltage clamp (32.5 V), pulse-skip to prevent flux runaway, and thermal shutdown at 150 °C. All protections trigger automatic restart after fault clearance - no external circuitry required for basic safety compliance in Class II applications.