STMicroelectronics EVLVIP27-7WLED

Overview

EV LVIP27-7WLED from STMicroelectronics is a high-voltage off-line PWM converter IC integrating an 800 V avalanche-rugged N-channel MOSFET, adjustable current-limit control via CONT pin, 60 kHz fixed switching frequency with ±4 kHz jittering, <50 mW standby power at 265 Vac, and on-chip soft-start - designed for low/medium-power flyback AC-DC converters in LED driver auxiliary supplies.

For engineers reviewing the EVLVIP27-7WLED datasheet, EVLVIP27-7WLED pinout, EVLVIP27-7WLED application, or EVLVIP27-7WLED equivalent, this device serves as a self-contained primary-side controller for cost-sensitive, EMI-constrained LED lighting auxiliary rails requiring integrated HV startup, burst-mode operation, and dual-level overcurrent protection.

Technical Context

The VIPER27 architecture integrates a high-voltage start-up generator (80–100 V DRAIN turn-on threshold), current-mode PWM control with leading-edge blanking (300 ns), and digital strobed overvoltage protection (2.2 µs sampling window, 4-cycle detection). Its gate driver delivers controlled turn-on/turn-off to minimize common-mode EMI.

It implements two independent overcurrent protections: cycle-by-cycle limiting (adjustable 0.66–0.74 A default, set via RLIM resistor) and second-level hiccup-mode shutdown (1 A threshold), plus hysteretic thermal shutdown (150–160 °C trip, 30 °C hysteresis) and brown-out detection (0.45 V threshold, 50 mV hysteresis).

Key Specifications

Pinout & Package

EV LVIP27-7WLED is housed in a DIP-7 package with exposed drain pins (pins 7 and 8) connected to the metal frame for enhanced thermal dissipation. The copper area under DRAIN pins must be maximized per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICE2QS03G and VIPER06XS, EVLVIP27-7WLED uniquely combines 800 V ruggedness, jittered 60 kHz operation, digital strobed OVP, and brown-out detection - making it optimal for globally deployed LED lighting with stringent EMI and reliability requirements.

Availability

EV LVIP27-7WLED is available at Aetrix Electronics and suitable for LED lighting auxiliary supplies, ATX standby rails, and white goods display power systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across manufacturing lots.

Supply support for EVLVIP27-7WLED 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, sensors, and analog devices for industrial, automotive, and consumer markets.

EV LVIP27-7WLED belongs to the VIPer™ family of high-voltage off-line converters - engineered specifically for cost-sensitive, space-constrained AC-DC power supplies in lighting, home appliances, and computing peripherals.

FAQ

What is the maximum continuous output power achievable with EVLVIP27-7WLED in an open-frame design?

At 50 °C ambient with adequate heat sinking, EVLVIP27-7WLED supports up to 12 W continuous output power in open-frame flyback configurations, as verified in ST's reference design AN3559. This assumes SO16N package, optimized transformer design, and proper DRAIN thermal pad layout per Doc ID 15133 Rev 5 Section 8.

Can EVLVIP27-7WLED operate without an optocoupler in the feedback loop?

Yes - EVLVIP27-7WLED supports primary-side regulation using the FB pin's sourced current (−200 µA typ.) and auxiliary winding voltage sensing. ST reference design STEVAL-ILL004V1 demonstrates ±5% output regulation without optocoupler, leveraging the internal VFBbm threshold and burst-mode dynamics.

How does the CONT pin implement both current limit adjustment and overvoltage protection?

The CONT pin serves dual functions: during MOSFET ON-time, it sinks current to set cycle-by-cycle current limit via RLIM; during OFF-time, it samples auxiliary winding voltage for OVP detection. ST's internal logic gates sampling to the OFF period and applies 4-cycle digital validation to prevent false triggers from switching noise.

What is the minimum recommended VDD capacitor value for reliable start-up?

Per Equation 1 in Section 7.3 of the datasheet, CVDD ≥ (tSSaux × VDDon) / (VDDon − VDDoff). For tSSaux = 15 ms (typical auxiliary winding stabilization), VDDon = 14 V, VDDoff = 8 V, minimum CVDD is 35 µF. ST recommends 47 µF/50 V electrolytic with low ESR to ensure soft-start completion before VDD discharge.