Product overview
Description
The device is an off-line converter with an 800 V rugged power section, a PWM control, two levels of over-current protection, overvoltage and overload protections, hysteretic thermal protection, soft-start and safe auto-restart after any fault condition removal. Burst mode operation and device very low consumption help to meet the standby energy saving regulations.
Advance frequency jittering reduces EMI filter cost. Brown-out function protects the switch mode power supply when the rectified input voltage level is below the normal minimum level specified for the system. The high voltage start-up circuit is embedded in the device.
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All features
- 800 V avalanche rugged power section
- PWM operation with frequency jittering for low EMI
- Operating frequency:
- 60 kHz for L type
- 115 kHz for H type
- Standby power < 50 mW at 265 Vac
- Limiting current with adjustable set point
- Adjustable and accurate overvoltage protection
- On-board soft-start
- Safe auto-restart after a fault condition
- Hysteretic thermal shutdown
Circuit Diagram
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STMicroelectronics - VIPER27
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All resources
| Resource title | Version | Latest update | Actions | Details | Download |
|---|
SPICE models (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 1.0 | 10 Jan 2017 | 10 Jan 2017 |
Board Manufacturing Specifications (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 2.1 | 01 Aug 2015 | 01 Aug 2015 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| VIPER27HD | Active Product is in volume production. | SO-16 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER27HDTR | Active Product is in volume production. | SO-16 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER27HN | Active Product is in volume production. | PDIP 7 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER27LD | Active Product is in volume production. | SO-16 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER27LDTR | Active Product is in volume production. | SO-16 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER27LN | Active Product is in volume production. | PDIP 7 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | Transistor Breakdown Voltage (V) (min) | Drain Current (A) (nom) | RDS(on) (Ω) (max) | ||
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| VIPER27HN | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER27LDTR | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER27HDTR | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER27LN | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER27HD | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER27LD | | | distributors No availability of distributors reported, please contact our sales office |
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VIPER27HN Active
VIPER27LDTR Active
VIPER27HDTR Active
VIPER27LN Active
VIPER27HD Active
VIPER27LD Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors