STMicroelectronics VIPER0PLDTR

Overview

VIPER0PLDTR 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 circuit, and sense-FET in a single SO16 narrow package. 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 appliances and industrial power supplies.

For engineers reviewing the VIPER0PLDTR datasheet, VIPER0PLDTR pinout, VIPER0PLDTR application, or VIPER0PLDTR equivalent, this device is selected for ultra-low standby consumption, self-supply capability eliminating auxiliary windings, jittered 60 kHz ±7% switching frequency to reduce EMI filter cost, integrated thermal shutdown, and MCU-controllable ZPM entry/exit via dedicated ON/OFF pins.

Technical Context

The VIPER0PLDTR implements a current-mode PWM control architecture with an internal transconductance error amplifier referenced to 1.2 V (referred to EAGND), separate EAGND for negative-output flyback configurations, and dynamic COMP pin driving for primary or secondary regulation. Its oscillator features ±7% frequency jitter at 260 Hz to spread spectral energy and reduce conducted EMI.

ZPM operation is managed by external MCU control of ON/OFF pins with debounce times of 20–35 µs (ON) and 10–16 ms (OFF); during ZPM, quiescent current drops to 20 µA at 325 V DRAIN, and the IC remains powered via its own VCC capacitor charged by the embedded HV current source (ICH3 = 7.8 mA typ.).

Key Specifications

Pinout & Package

Package: SO16 narrow (SO16N), with DRAIN pins (13–16) thermally connected to internal MOSFET metal pad; requires PCB copper area under DRAIN pins for thermal management (R_thJA = 80 °C/W on 100 mm² FR4).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar off-line high-voltage converter applications.

Compared with ICE3B0565J and LNK364PG, VIPER0PLDTR uniquely combines ZPM, self-supply, jittered switching, and 800 V ruggedness - making it optimal for next-gen smart appliances needing <5 mW standby, simplified transformer design, and robust surge handling without auxiliary components.

Availability

VIPER0PLDTR 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 across extended product lifecycles.

Supply support for VIPER0PLDTR 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 silicon solutions for automotive, industrial, and consumer markets since 1987.

VIPER0P belongs to ST's VIPer™ family of high-voltage converters engineered specifically for ultra-low-standby, self-supplied, and MCU-managed off-line SMPS in space-constrained and energy-regulated applications.

FAQ

What is the difference between VIPER0PLDTR and VIPER0PHDTR?

VIPER0PLDTR operates at 60 kHz ±7% nominal switching frequency and targets medium-power applications (up to 12 W) with lower EMI filtering demands. VIPER0PHDTR runs at 120 kHz ±7%, enabling smaller magnetics and higher power density but requiring tighter layout for EMI control. Both share identical ZPM, self-supply, and protection features.

Can VIPER0PLDTR operate without an auxiliary winding?

Yes - its self-supply mode uses only the VCC capacitor charged by the internal HV current source during OFF time. This eliminates the need for an auxiliary winding or bias circuit, reducing transformer complexity and BOM cost while maintaining regulation across load and line variations.

How does the zero-power mode (ZPM) interact with the MCU?

ZPM is entered by pulling the OFF pin to SGND for ≥10 ms; exited by pulling ON to SGND for ≥20 µs. The MCU supplies itself from VCC during ZPM (via internal charge pump), enabling wake-on-event functionality. No external power sequencing is needed - the IC manages all transitions autonomously.

What thermal considerations apply to the DRAIN pins?

DRAIN pins (13–16) are directly bonded to the MOSFET die pad. To maintain T_j ≤ 150 °C, ≥100 mm² of 35 µm copper must be placed beneath them on the PCB. With this, R_thJA is 80 °C/W; without it, thermal resistance rises to 110 °C/W, risking premature thermal shutdown under full load.