STMicroelectronics VIPER100(022Y)

Overview

VIPER100(022Y) from STMicroelectronics is a high-voltage, current-mode PWM controller with integrated 620 V/3 A vertical power MOSFET, designed for primary-side offline SMPS in wide-range AC inputs (85–265 VAC). It delivers up to 50 W in universal input configurations, features adjustable switching frequency up to 100 kHz (typ.), internal start-up current source, and burst-mode operation enabling <1 W standby consumption per Blue Angel norm.

For engineers reviewing the VIPER100(022Y) datasheet, VIPER100(022Y) pinout, VIPER100(022Y) application, or VIPER100(022Y) equivalent, key selection criteria include its integrated HV MOSFET breakdown voltage (620 V), R_DS(on) (2.5 Ω typ.), undervoltage lockout thresholds (V_DDoff = 8 V, V_DDon = 12 V), thermal shutdown at 140 °C, and COMP-pin–based primary/secondary regulation flexibility.

Technical Context

The VIPER100(022Y) implements a current-mode control architecture with dual-loop regulation: an inner peak-current sensing loop (via drain-source voltage monitoring) and an outer transconductance error amplifier loop referenced to VDD or optocoupler feedback. Its oscillator uses an external R_t-C_t network, delivering stable frequency (90–110 kHz typ.) across VDD = 9–15 V with ±1% resistor and ±5% capacitor tolerance.

Start-up is enabled by an integrated high-voltage current source (2 mA typ.) sourced from the DRAIN pin, automatically disabled once VDD reaches 12 V; protection includes blanking time (250 ns), overtemperature shutdown (140 °C), and automatic burst mode triggered when V_COMP falls below 0.5 V under light-load conditions.

Key Specifications

Pinout & Package

Package: PENTAWATT HV (022Y), 5-pin, thermally enhanced SIP package with isolated high-voltage creepage and 1.4 °C/W junction-to-case thermal resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar primary-side SMPS controller applications.

Compared with VIPER100A(022Y), the VIPER100(022Y) offers lower conduction loss and higher peak current for universal-input consumer adapters, while the NCP1014ST trades integration for greater flexibility in transformer design and multi-rail sequencing-but adds ≥6 passive components and fails Blue Angel compliance without added circuitry.

Availability

VIPER100(022Y) is available at Aetrix Electronics and suitable for AC-DC adapters, smart home power supplies, industrial control power, and white goods auxiliary supplies requiring stable component supply and long-term lifecycle support.

Supply support for VIPER100(022Y) 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, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.

The VIPer series targets cost-sensitive, high-efficiency offline SMPS designs-combining VIPower M0 technology with integrated control logic to replace discrete controller+MOSFET solutions in sub-100 W applications.

FAQ

What is the maximum continuous output power achievable with VIPER100(022Y) in a universal-input flyback?

The VIPER100(022Y) supports up to 50 W continuous output in wide-range (85–265 VAC) flyback topologies with proper heatsinking and transformer design. This is validated per ST's AN2349 application note using a 1.4 °C/W thermal interface and 2-layer PCB with 2 oz copper. Output power is limited by R_DS(on) conduction loss and junction temperature rise-not switching frequency or current limit.

Can VIPER100(022Y) operate without an auxiliary winding for VDD supply?

Yes-during start-up, the integrated high-voltage current source (2 mA typ.) charges the VDD capacitor directly from the DRAIN pin, eliminating need for an auxiliary winding until VDD reaches 12 V. However, sustained operation requires auxiliary winding or bias circuit to maintain VDD regulation above 8 V; open-loop operation without it causes repeated UVLO cycling.

How does burst mode operation affect output voltage ripple in standby?

In burst mode, the VIPER100(022Y) delivers energy in discrete packets at ~1–5 Hz, causing low-frequency ripple (±3% pk-pk) on the output. This is managed by standard output capacitors (e.g., 220 µF/25 V); the amplitude remains low because standby load current is typically <10 mA, minimizing discharge delta-V between bursts.

Is the COMP pin compatible with both primary-side and secondary-side regulation schemes?

Yes-the COMP pin functions identically in both configurations: in primary regulation, VDD is clamped to 13 V and COMP sets peak current; in secondary regulation, optocoupler feedback pulls COMP low to reduce duty cycle. The transconductance amplifier's 1.5 mA/V gain and 0.5 V shutdown threshold are invariant across both modes per Table 10 and Figure 4.