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SI9121 - High-Voltage/ Non-Isolated Buck-Boost Converter for ISDN Digital Phones

Description

The Si9121 simplifies the

48-V to +5-V or +3.3-V converter design for ISDN application by integrating the floating feedback error amplifier providing direct output voltage regulation.

This approach eliminates the need for an external shunt regulator.

Features

  • D Fixed +5-V or +3.3-V Output D Integrated Floating Feedback Amplifier D On-Chip 70-V, 1.5-W N-Channel MOSFET Switch D Integrated High Voltage Start-Up Circuit, with VCC Regulator D D D D D.
  • 10-V to.
  • 60-V Input Voltage Range 95-kHz PWM Operation Integrated Soft-Start and Oscillator High Efficiency Over Full Load Range Under Voltage Lockout D Current Mode Control D Hiccup Mode Short Circuit Protection D Thermal Shutdown D SOIC-8 Narrow-Body Package.

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Datasheet Details

Part number SI9121
Manufacturer Vishay
File Size 72.42 KB
Description High-Voltage/ Non-Isolated Buck-Boost Converter for ISDN Digital Phones
Datasheet download datasheet SI9121 Datasheet

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Full PDF Text Transcription

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Si9121 New Product Vishay Siliconix High-Voltage, Non-Isolated Buck-Boost Converter for ISDN Digital Phones FEATURES D Fixed +5-V or +3.3-V Output D Integrated Floating Feedback Amplifier D On-Chip 70-V, 1.5-W N-Channel MOSFET Switch D Integrated High Voltage Start-Up Circuit, with VCC Regulator D D D D D –10-V to –60-V Input Voltage Range 95-kHz PWM Operation Integrated Soft-Start and Oscillator High Efficiency Over Full Load Range Under Voltage Lockout D Current Mode Control D Hiccup Mode Short Circuit Protection D Thermal Shutdown D SOIC-8 Narrow-Body Package DESCRIPTION The Si9121 simplifies the –48-V to +5-V or +3.3-V converter design for ISDN application by integrating the floating feedback error amplifier providing direct output voltage regulation.
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