VIPER17L Integrated Circuit Chip new & original Off-line high voltage converters
chip in electronics
,integrated components
VIPER17
Off-line high voltage converters
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 over voltage protection
■ On-board soft-start
■ Safe auto-restart after a fault condition
■ Hysteretic thermal shutdown
Application
■ Adapters for PDA, camcorders, shavers, cellular phones, videogames
■ Auxiliary power supply for LCD/PDP TV, monitors, audio systems, computer, industrial systems
■ SMPS for set-top boxes, DVD players and recorders, white goods
Description
The device is an off-line converter with an 800 V rugged power section, a PWM control, two levels of over current protection, over voltage 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.
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.
Absolute maximum ratings
| Symbol | Pin (DIP7) | Parameter | Value | Unit |
| VDRAIN | 7, 8 | Drain-to-source (ground) voltage | 800 | V |
| EAV | 7, 8 | Repetitive avalanche energy (limited by TJ = 150 °C) | 2 | mJ |
| IAR | 7, 8 | Repetitive avalanche current (limited by TJ = 150 °C) | 1 | A |
| IDRAIN | 7, 8 | Pulse drain current | 2.5 | A |
| VCONT | 3 | Control input pin voltage (with ICONT = 1 mA) | Self limited | V |
| VFB | 4 | Feed-back voltage | -0.3 to 5.5 | V |
| VBR | 5 | Brown-out input pin voltage | 2 | V |
| VDD | 2 | Supply voltage (IDD = 25 mA) | Self limited | V |
| IDD | 2 | Input current | 25 | mA |
| PTOT | Power dissipation at TA < 50 °C | 1 | W | |
| TJ | Operating junction temperature range | -40 to 150 | °C | |
| TSTG | Storage temperature | -55 to 150 | °C |
Typical topology
Block diagram
Stock Offer (Hot Sell)
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