Datasheet4U Logo Datasheet4U.com

AN732 - Designing A High-Voltage Non-Isolated Buck-Boost Converter with the Si9121DY

Datasheet Summary

Features

  • include the under-voltage lock out, programmable soft start, pulse by pulse current limit, hiccup mode with negligible power delivery and dissipation during continuous short circuit conditions, automatic recovery from hiccup after fault removal, and over temperature shutdown. The Si9121 is available in a narrow body SO-8 package and allows power dissipation of up to 1.25 W. while the output capacitor supports the load current. Since the current in an inductor cannot change instantaneously, the v.

📥 Download Datasheet

Datasheet preview – AN732

Datasheet Details

Part number AN732
Manufacturer Vishay Siliconix
File Size 75.30 KB
Description Designing A High-Voltage Non-Isolated Buck-Boost Converter with the Si9121DY
Datasheet download datasheet AN732 Datasheet
Additional preview pages of the AN732 datasheet.

📁 Similar Datasheet

  • AN7320 - Pre-Amplifier Circuit (Matsushita)
  • AN7322 - Live IC for PRC & Stereo Headphone Player (Matsushita)
  • AN7310N - Dual Pre-Amplifier for Car Radio (Matsushita Electric)
  • AN7311 - Dual Pre-Amplifier (Panasonic Semiconductor)
  • AN7312 - DUAL RECORDING /PLAYBACK PRE AMPLIFIER CIRCUIT WITH ALC (Panasonic Semiconductor)
  • AN7312 - DUAL RECORDING /PLAYBACK PRE AMPLIFIER CIRCUIT WITH ALC (Panasonic)
  • AN7315 - Low Voltage Dual Pre-Amplifier Circuit (Matsushita)
  • AN7316 - DUAL RECORDING AND PLAYBACK PRE-AMPLIFIER IC FOR SINGLE/DOUBLE CASSETTE (Panasonic Semiconductor)
  • AN7316 - DUAL RECORDING AND PLAYBACK PRE-AMPLIFIER IC FOR SINGLE/DOUBLE CASSETTE (Panasonic)
  • AN7317 - Dual Recording and Playback Pre-AMP IC for Single/Double Cassette (Matsushita)
Other Datasheets by Vishay Siliconix
  • AN734 - Design Guidelines for the Low-Noise Low-Dropout Regulator Si9181
  • AN701 - Designing High-Frequency DC-to-DC Converters With the Si9114A Switchmode Controller
  • AN708 - Low-Power Universal-Input Power Supply Achieves High Efficiency
  • AN709 - Designing with the Si9976DY N-Channel Half-Bridge Driver and LITTLE FOOT Dual MOSFETs
  • AN727 - High-Frequency / High-Efficiency Buck Converter Design For Multi-Cell Battery Configured Systems
  • AN728 - Designing A Flyback Converter

Full PDF Text Transcription

Click to expand full text
AN732 Vishay Siliconix Designing A High-Voltage Non-Isolated Buck-Boost Converter with the Si9121DY Nitin Kalje INTRODUCTION The Si9121DY is a non-isolated buck-boost converter IC, operating from a wide input voltage range of –10 to –60 V with minimal external components. This polarity inverter converts –48 V to +5 V or +3.3 V, making it suitable for applications including digital phones and ISDN power supplies. A non-isolated buck-boost design with the Si9121 eliminates the need for an expensive transformer, while its integrated low on-resistance MOSFET driver, floating feedback error amplifier, fixed-frequency oscillator, output voltage sensing resistor divider, and depletion mode MOSFET for start up/VCC regulation reduce the external component count to less than 10.
Published: |