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Product Detailed Parameters
- Description：IC OFFLINE SW MULT TOP 10SSOP
- Series：VIPER™
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Isolation：Non-Isolated
- Internal Switch(s)：Yes
- Voltage - Breakdown：800V
- Topology：Buck, Buck-Boost, Flyback
- Voltage - Start Up：16 V
- Voltage - Supply (Vcc/Vdd)：4.5V ~ 30V
- Duty Cycle：80%
- Frequency - Switching：60kHz
- Fault Protection：Over Load, Over Voltage
- Control Features：Soft Start
- Operating Temperature：-40°C ~ 150°C (TJ)
- Package / Case：10-SOP (0.154", 3.90mm Width)
- Supplier Device Package：10-SSOP
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Power (Watts)：12 W
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Overview
The VIPER114LSTR is an energy-saving offline high voltage converter from STMicroelectronics, part of the VIPerPlus family. It integrates an 800 V avalanche-rugged power MOSFET with a PWM current mode controller in a 10-pin SSOP package. The device supports Buck, Buck-Boost, and Flyback topologies with a switching frequency of 60 kHz ± 7%. It operates within a supply voltage range of 4.5 V to 30 V, features a maximum duty cycle of 80%, and draws 1.25 mA operating supply current. The drain current limit is specified at 480 mA, and it functions reliably between -40°C and +125°C.
Feature Summary
- Integrates an 800 V avalanche-rugged power MOSFET for extended input voltage coverage and reduced snubber circuit size.
- Incorporates embedded high-voltage startup, sense-FET, error amplifier, and jittered oscillator to minimize external component count.
- Provides comprehensive protection mechanisms including automatic restart for overload/short-circuit, line/output overvoltage, and thermal shutdown.
Applications
- Flyback AC/DC converters
- Buck AC/DC converters
- Buck-Boost AC/DC converters
Procurement Notes
Verify the specific suffix 'LSTR' corresponds to the 60 kHz jittered switching frequency variant when sourcing. Confirm the SSOP-10 package dimensions and moisture sensitivity level requirements during handling. Ensure the application design accounts for the 480 mA drain current limit and the 80% maximum duty cycle constraints. Cross-reference the datasheet revision to confirm compatibility with intended EMI standards and regulatory compliance requirements.
Selection Notes
Select this component for designs requiring integrated high-voltage conversion with minimal external components. The 60 kHz switching frequency offers a balance between efficiency and EMI performance compared to lower or higher frequency variants. Consider the 480 mA current limit for output power requirements. The wide supply voltage range and integrated protections simplify bias circuit design and enhance system reliability in cost-sensitive applications.
Part Context
This part belongs to the VIPerPlus family of energy-saving offline converters. It shares architectural similarities with VIPER113 and VIPER115, differing primarily in drain current limits (370 mA, 480 mA, and 590 mA respectively) and switching frequencies. The LSTR suffix indicates the 60 kHz type with SSOP packaging and tape-and-reel delivery format.
Replacement Considerations
VIPER114HSTR: Offers 120 kHz switching frequency. VIPER114XSTR: Offers 30 kHz switching frequency. VIPER115LSTR: Provides higher 590 mA current limit with identical 60 kHz frequency and SSOP-10 package.
