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VIPER26LD Datasheet(PDF) 1 Page - STMicroelectronics |
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VIPER26LD Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 25 page  September 2010 Doc ID 17736 Rev 2 1/25 25 VIPER26 Fixed frequency VIPerTM plus family 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 ■ On-board soft-start ■ Safe auto-restart after a fault condition ■ Hysteretic thermal shutdown Application ■ Auxiliary power supply for appliances ■ Power metering ■ LED drivers ■ SMPS for set-top boxes, DVD players and recorders Description The device is an off-line converter with an 800 V avalanche ruggedness power section, a PWM controller, user defined overcurrent limit, protection against feedback network disconnection, hysteretic thermal protection, soft start up and safe auto restart after any fault condition. Advance frequency jittering reduces EMI filter cost. Burst mode operation and the devices very low consumption both help to meet the standard set by energy saving regulations. Figure 1. Typical topology (VOUT ≤V DDCSon) DIP-7 SO-16 SO16 narrow VIPER26 DRAIN COMP GND FB LIM VDD VIPER26 DRAIN COMP GND FB LIM VDD DC Output Voltage - DC Input Voltage Table 1. Device summary Order codes Package Packaging VIPER26LN DIP-7 Tube VIPER26HN VIPER26HD SO16 narrow Tube VIPER26HDTR Tape and reel VIPER26LD Tube VIPER26LDTR Tape and reel www.st.com |
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