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The device is an off-line converter with an 800 V rugged power section, a PWM control, double levels of overcurrent 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 helps to meet the standby energy saving regulations. The quasi-resonant feature reduces EMI filter cost. Brown-out and brown-in 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.
Key Features
- 800 V avalanche rugged power section
- Quasi-resonant (QR) control for valley switching operation
- 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
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Sample & Buy
| Part Number | Package | Packing Type | Marketing Status | RDS(on) (Ω) (max) | Transistor Breakdown Voltage (V) (min) | Drain Current (A) (nom) | ECCN (US) | Country of Origin | More info | Approximate Price (US$)* / Qty | Order from ST | Order from Distributors |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VIPER25HD | SO-16 | Tube | Active | 7 | 800 | 0.7 | EAR99 | CHINA | 1.02 / 1k | Buy now | Check Availability | |
| VIPER25LD | SO-16 | Tube | Active | 7 | 800 | 0.7 | EAR99 | CHINA | 1.02 / 1k | Buy now | Check Availability | |
| VIPER25HDTR | SO-16 | Tape And Reel | Active | 7 | 800 | 0.7 | EAR99 | CHINA | 1.02 / 1k | Buy now | No availability of distributors reported, please contact our sales office | |
| VIPER25HN | PDIP 7 | Tube | Active | 7 | 800 | 0.7 | EAR99 | MALAYSIA | 1.07 / 1k | Buy now | Check Availability | |
| VIPER25LDTR | SO-16 | Tape And Reel | Active | 7 | 800 | 0.7 | EAR99 | CHINA | 1.02 / 1k | Buy now | Check Availability | |
| VIPER25LN | PDIP 7 | Tube | Active | 7 | 800 | 0.7 | EAR99 | MALAYSIA | 1.07 / 1k | Buy now | Check Availability |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
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Evaluation Tools
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Picture Part number Manufacturer Description 
STEVAL-ISA162V1 ST 12 V/10 W isolated flyback converter based on VIPer25HD Part Number12 V/10 W isolated flyback converter based on VIPer25HD
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| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| VIPER25HD | Active | SO-16 | Industrial | Ecopack2 | |
| VIPER25HDTR | Active | SO-16 | Industrial | Ecopack2 | |
| VIPER25HN | Active | PDIP 7 | Industrial | Ecopack2 | |
| VIPER25LD | Active | SO-16 | Industrial | Ecopack2 | |
| VIPER25LDTR | Active | SO-16 | Industrial | Ecopack2 | |
| VIPER25LN | Active | PDIP 7 | Industrial | Ecopack2 | |
VIPER25HD
Package:
SO-16Material Declaration**:
VIPER25HDTR
Package:
SO-16Material Declaration**:
VIPER25LN
Package:
PDIP 7Material Declaration**:
(**) 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.
