STMicroelectronics VIPER12ADIP-E

Overview

VIPER12ADIP-E from STMicroelectronics is a monolithic high-voltage offline SMPS primary switcher integrating a 730 V avalanche-rated power MOSFET and current-mode PWM controller in a single DIP-8 package. It delivers up to 13 W output power (195–265 Vac) with fixed 60 kHz switching, 9–38 V VDD operating range, and built-in overtemperature, overcurrent, and overvoltage protection with auto-restart - used in standby supplies for TVs, battery charger adapters, and auxiliary motor control supplies.

For engineers reviewing the VIPER12ADIP-E datasheet, VIPER12ADIP-E pinout, VIPER12ADIP-E application, or VIPER12ADIP-E equivalent, key selection criteria include its integrated high-voltage start-up current source, VDD hysteresis (6.5 V typ), FB pin current-sensing architecture, and DIP-8 thermal resistance (R_thJA = 45 °C/W).

Technical Context

The VIPER12ADIP-E implements current-mode control using an internal sense resistor and comparator referenced to 0.23 V, enabling precise peak current limiting via FB pin current (0–0.9 mA). Its oscillator operates at a fixed 60 kHz (±10%) across 0–100 °C and full VDD range (9–38 V), with blanking time (500 ns) and minimum on-time (700 ns) ensuring stable operation under light-load burst mode.

Protection logic includes thermal shutdown at 170 °C (40 °C hysteresis), VDD overvoltage latch at 42 V (auto-clear when VDD drops to 8 V), and undervoltage lockout with VDDon = 14.5 V / VDDoff = 8 V. The high-voltage start-up current source (−1 mA) activates only when VDD < VDDon, eliminating external start-up circuitry.

Key Specifications

Pinout & Package

DIP-8 package with through-hole mounting; 15 °C/W junction-to-case thermal resistance enables higher power density than SO-8 variant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar offline SMPS primary switcher applications.

Compared with ICE2A265J and LNK304P, VIPER12ADIP-E offers superior integration (HV start-up, VDD hysteresis, HICCUP OVP), higher 730 V rating for surge margin, and FB-based current programming - making it optimal for reliable, low-BOM-count 5–13 W offline supplies.

Availability

VIPER12ADIP-E is available at Aetrix Electronics and suitable for battery charger adapters, TV standby supplies, and auxiliary motor control supplies requiring stable component supply and long-term industrial availability.

Supply support for VIPER12ADIP-E 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, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets with emphasis on energy efficiency and system integration.

The VIPER™ family targets cost-sensitive, low-to-medium power offline SMPS applications, combining high-voltage power stages with control logic to replace discrete MOSFET+controller designs in adapters, auxiliaries, and industrial power modules.

FAQ

What is the maximum continuous output power achievable with VIPER12ADIP-E in a DIP-8 package?

The VIPER12ADIP-E delivers up to 13 W continuous output power under European mains conditions (195–265 Vac) with adequate PCB copper area (200 mm²) and proper heatsinking. At universal input (85–265 Vac), maximum output is 8 W due to higher conduction losses at low line. This is confirmed by Table 8 in ST's Doc ID 11977 Rev 2, specifying DIP-8 power capability under defined thermal conditions.

How does the FB pin current control output current regulation?

The FB pin sinks current (0–0.9 mA) that directly sets peak drain current via internal gain of 320. With FB shorted to SOURCE, peak current reaches 0.4 A; at 0.5 mA FB current, peak current drops to ~0.2 A. This linear I_Fb-to-I_D relationship enables precise current limiting for battery charging and constant-current LED drivers without external sense resistors.

Does VIPER12ADIP-E require an external start-up resistor?

No. VIPER12ADIP-E integrates a −1 mA high-voltage start-up current source connected internally to the DRAIN pin, enabling direct connection to the rectified mains without external resistor. This feature eliminates start-up resistor power loss and improves reliability, as documented in Section 7 (Startup Sequence) of the datasheet.

What protection features are implemented and how do they recover?

VIPER12ADIP-E includes overtemperature shutdown (170 °C, 40 °C hysteresis), overvoltage latch (42 V on VDD, auto-clears at 8 V), and overcurrent limiting (0.4 A peak). All protections trigger auto-restart: thermal shutdown halts switching until junction cools; overvoltage enters HICCUP mode, cycling on/off until VDD stabilizes; overcurrent limits each cycle without latching.