VIPER20ADIP-E

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VIPER20ADIP-E

+BOM

IC OFFLINE SWITCH FLYBACK 8DIP

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Specifications

Attribute Value
Package Tube
Series VIPER™
ProductStatus Obsolete
OutputIsolation Isolated
InternalSwitch(s) Yes
Voltage-Breakdown 700V
Topology Flyback
Voltage-StartUp 11 V
Voltage-Supply(Vcc/Vdd) 8V ~ 15V
Frequency-Switching Up to 200kHz
Power(Watts) 20 W
FaultProtection Current Limiting, Over Temperature
Package/Case 8-DIP (0.300, 7.62mm)
SupplierDevicePackage 8-DIP

Overview

Description

VIPER20ADIP-E is STMicroelectronics’ offline flyback switch IC in an 8‑pin DIP package. It combines a high‑voltage DMOS switch (≈700 V), startup current source, oscillator, and control logic for isolated AC‑DC power supplies, aiming at low-to-medium power flyback converters with few external parts.
Key points:
- Integrated HV MOSFET, startup source, current‑mode control
- Protections: overcurrent/short‑circuit, undervoltage lockout, thermal shutdown (and often line/overload protection)
- Suitable for isolated SMPS (wall adapters, battery chargers, LED drivers) using flyback topology
- -E typically indicates a lead‑free/ RoHS‑compliant variant
Design notes:
- External components: transformer, secondary rectifier/filter, and feedback (optocoupler or primary‑side regulation, depending on design)
- Check the datasheet for exact electrical specs, recommended app circuits, and package details.

Features

VIPER20ADIP-E is an all-in-one offline switcher with an integrated high-voltage MOSFET. Key features:
- 700 V high-voltage DMOS transistor integrated with control circuitry
- Primary-side regulation (PSR) for flyback designs—no optocoupler needed
- Fixed-frequency PWM control with current-mode operation
- Internal startup supply, soft-start, and Vcc regulation
- Protections: overcurrent/short-circuit, overvoltage, and thermal shutdown
- UVLO and robust fault management for reliable operation
- Very low standby power; suitable for universal mains (≈85–265 VAC)
- 8-pin DIP package (VIPER20ADIP-E), RoHS-compliant
- Ideal for compact low-power offline flyback converters (chargers, adapters, small PSU apps)
Note: specifics like exact frequency and performance may vary by revision; consult the datasheet for exact electrical characteristics.

Pinout

- Pin count: 8 pins (DIP-8, VIPER20ADIP-E).
- Function: An offline switch-mode power-supply controller with an integrated high-voltage MOSFET (about 600 V) for flyback converters. It provides startup, Vcc regulation, undervoltage, oscillator/PWM control, current-mode limit, and feedback via an opto-isolator. Pin roles (high level): DRAIN (HV input to the internal MOSFET), VCC (controller supply), GND (signal ground), FB (feedback input), IS (current sense/limit input), and two remaining pins reserved/no-connect.

Manufacturer

- Manufacturer: STMicroelectronics (ST).
- What kind of company: A global multinational semiconductor company that designs, manufactures, and markets a broad range of ICs and semiconductor solutions (analog, digital, MEMS, microcontrollers, power management) for automotive, industrial, consumer, and other markets.

Application

VIPER20ADIP-E is a high-voltage offline flyback regulator with an integrated MOSFET. Primary applications include:
- AC mains to low-voltage DC adapters/chargers (up to ~20 W)
- LED drivers (constant-current/constant-voltage)
- Standby/power rails for TVs, monitors, set-top boxes, and home appliances
- Open-frame and enclosed offline power supplies
- Isolated telecom/industrial power supplies and battery charging circuits
- Small appliance power supplies and other consumer electronics requiring compact, low-component-count SMPS

Package

VIPER20ADIP-E uses an 8-pin DIP (DIP-8) through-hole plastic package.

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