STMicroelectronics VIPER013HSTR

Overview

VIPER013HSTR from STMicroelectronics is a high-voltage off-line SMPS controller integrating an 800 V avalanche-rugged N-channel MOSFET, current-mode PWM control, and embedded HV startup. It delivers up to 4 W in open-frame designs at 85–265 VAC input, features 120 kHz ±7% jittered switching frequency, 360 mA typical drain current limit (at 25 °C), and <10 mW no-load power consumption at 230 VAC - enabling compact, energy-compliant flyback converters for low-power adapters and home appliance power supplies.

For engineers reviewing the VIPER013HSTR datasheet, VIPER013HSTR pinout, VIPER013HSTR application, or VIPER013HSTR equivalent, this device is selected for ultra-low standby power, self-supply operation without auxiliary winding, integrated OCP/OLP/VCC clamp/thermal shutdown, and direct primary-side regulation via FB pin - critical for cost-sensitive, space-constrained AC-DC conversion where component count and EMI filter size must be minimized.

Technical Context

The VIPER013HSTR implements a fixed-frequency current-mode PWM controller with jittered oscillator (120 kHz ±7%) to reduce peak EMI emissions. Its internal 800 V MOSFET enables direct rectified mains connection without external snubber scaling, while the embedded sense-FET provides lossless current sensing for cycle-by-cycle OCP.

It supports dual supply modes: self-supply (HV current source recharges VCC when it drops to 4.25 V) and external supply (via auxiliary winding or output). Protection logic includes pulse-skip to prevent flux runaway, automatic restart after OLP/OVP/thermal faults, and soft-start (8 ms) that ramps IDLIM in 8 steps to limit inrush stress.

Key Specifications

Pinout & Package

Package: SSOP10 (3.9 mm × 4.9 mm, 0.65 mm pitch), thermally enhanced with DRAIN pins (6–10) connected to internal MOSFET metal pad for PCB copper-area heat sinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2QS03G and LNK364PG, VIPER013HSTR uniquely combines 800 V ruggedness, jittered 120 kHz operation, self-supply capability, and <10 mW no-load consumption - making it optimal for space- and efficiency-critical universal-input adapters where EMI filtering and component count are constrained.

Availability

VIPER013HSTR is available at Aetrix Electronics and suitable for smart home power supplies, LED driver modules, small appliance control boards, and industrial sensor interfaces requiring stable component supply, long-term lifecycle support, and compliance with global energy standards.

Supply support for VIPER013HSTR 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, analog chips, and MEMS sensors for industrial, automotive, and consumer markets.

VIPER013HSTR belongs to the VIPer01 family of high-voltage off-line converters engineered for ultra-low standby power, minimal external component count, and full integration of HV MOSFET and control logic - targeting cost-sensitive, energy-regulated AC-DC applications below 7 W.

FAQ

What is the maximum continuous output power achievable with VIPER013HSTR?

VIPER013HSTR delivers up to 4 W in open-frame designs at 50 °C ambient with adequate heatsinking, and 4.5 W in non-ventilated enclosed adapters. This is determined by its 360 mA drain current limit, 800 V MOSFET rating, and thermal resistance (R_TH-JA = 95 °C/W with 100 mm² copper), not by peak transient capability.

Can VIPER013HSTR operate without an auxiliary winding?

Yes - VIPER013HSTR supports self-supply mode where the internal HV current source recharges the VCC capacitor when voltage drops to 4.25 V. This eliminates the need for an auxiliary winding or bias circuit, reducing BOM count and PCB area in compact adapter designs.

How does the jittered oscillator reduce EMI in VIPER013HSTR?

The 120 kHz switching frequency is modulated ±7% at 260 Hz, spreading harmonic energy across a bandwidth instead of concentrating it at discrete frequencies. This lowers peak conducted emissions - especially under average detection - enabling smaller, lower-cost Y-cap and common-mode choke filters per CISPR 22/32 Class B limits.

What protections are implemented and how do they reset?

VIPER013HSTR integrates OCP, OLP, line/output OVP, VCC clamp, thermal shutdown, and pulse-skip. All fault protections trigger auto-restart after fixed delays: DIS fault restarts in ~500 ms, OLP in ~1 s, and thermal shutdown after junction cools below hysteresis threshold - no external latch or manual reset required.