STMicroelectronics VIPER013LSTR

Overview

VIPER013LSTR from STMicroelectronics is a high-voltage off-line PWM converter IC integrating an 800 V avalanche-rugged N-channel power MOSFET, current-mode PWM controller, embedded HV startup circuit, and sense-FET. It delivers up to 4.5 W in open-frame designs at 50 °C ambient, operates with 60 kHz ±7% jittered switching frequency, and achieves <10 mW no-load input power at 230 VAC - enabling energy-compliant low-power SMPS for lighting and home appliances.

For engineers reviewing the VIPER013LSTR datasheet, VIPER013LSTR pinout, VIPER013LSTR application, or VIPER013LSTR equivalent, key selection criteria include its self-supply capability (eliminating auxiliary winding), drain current limit of 360 mA (typ.), integrated thermal shutdown at 150–160 °C, and SSOP10 package with five DRAIN pins for enhanced thermal dissipation.

Technical Context

The VIPER013LSTR implements a fixed-frequency current-mode PWM controller with jittered oscillator (60 kHz ±7% at 260 Hz modulation rate) to reduce EMI filter size. Its internal transconductance error amplifier features a 1.2 V reference and supports both primary- and secondary-side regulation via FB and COMP pins.

It integrates an 800 V avalanche-rated power MOSFET with R_DS(on) = 30 Ω (T_J = 25 °C), drain current limiting (360 mA typ.), pulse-skip protection to prevent flux-runaway, and automatic-restart protections including OLP, OVP, max duty cycle counter, and VCC clamp at 30–35 V.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with VIPER013LSTR, ICE2QS03G requires more external components and offers no jittered EMI reduction, while LNK306P lacks DIS-based OVP and flexible feedback architecture - making VIPER013LSTR superior for compact, low-EMI, dual-regulation designs in energy-critical applications.

Availability

VIPER013LSTR is available at Aetrix Electronics and suitable for LED lighting drivers, smart home sensor power supplies, and white goods control board PSUs requiring stable component supply, long-term lifecycle support, and compliance with global energy efficiency regulations.

Supply support for VIPER013LSTR 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

VIPER013LSTR belongs to the VIPerPlus family of high-voltage offline controllers, engineered specifically for compact, low-noise, energy-efficient AC-DC conversion in sub-10 W applications.

FAQ

What is the maximum continuous output power achievable with VIPER013LSTR in an open-frame design?

The VIPER013LSTR delivers up to 4.5 W of continuous output power in open-frame configurations at 50 °C ambient temperature, as confirmed in ST's DS11423 datasheet Section 4.2. This assumes adequate PCB copper area (≥100 mm²) under DRAIN pins and proper thermal layout - exceeding the 4 W capability of the VIPER012 variant due to its higher current limit (360 mA vs. 240 mA).

Can VIPER013LSTR operate without an auxiliary winding?

Yes - VIPER013LSTR supports self-supply mode using only the VCC capacitor charged by its internal HV current source, eliminating the need for an auxiliary winding or external bias supply. During steady-state, the HV source recharges VCC when it drops to ~4.25 V, enabling fully winding-free designs compliant with IEC 62368-1 creepage requirements.

How does the DIS pin provide overvoltage protection?

The DIS pin triggers auto-restart protection when voltage exceeds 1.2 V for >1 ms. For output OVP in isolated flyback designs, a voltage divider from the auxiliary winding feeds DIS; for non-isolated buck topologies, a divider from the output rail is used. The 1 ms debounce prevents false triggering from noise, and recovery occurs after a 500 ms restart delay.

What thermal resistance values apply to VIPER013LSTR in SSOP10 package?

When mounted on a standard single-sided FR4 board with 100 mm² of 35 µm-thick copper, VIPER013LSTR achieves R_TH-JA = 95 °C/W and R_TH-JC = 5 °C/W (DS11423 Table 3). These values enable 1 W power dissipation at T_A = 50 °C before reaching the 150 °C junction limit - critical for sealed adapter designs where airflow is restricted.