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AN701 - Designing High-Frequency DC-to-DC Converters With the Si9114A Switchmode Controller

Description

The Si9114A controller is similar in configuration to the Si9110.

It uses a traditional constant frequency current mode control, the most commonly used architecture.

The duty cycle is limited to less than 50% to avoid problems with core reset.

Features

  • including a power MOSFET, high-voltage start circuitry, and low power consumption. The Si9114A controller pushes the limits for high-frequency power conversion by further reducing delay times and adding additional features. As a result, dc-to-dc converters can be designed for frequencies up to 1 MHz with simple PWM topologies instead of the complex resonant ones. S reduce the size of energy storage components S increase reliability by using ceramic capacitors S produce an all-surface-mount asse.

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Datasheet Details

Part number AN701
Manufacturer Vishay Siliconix
File Size 1.09 MB
Description Designing High-Frequency DC-to-DC Converters With the Si9114A Switchmode Controller
Datasheet download datasheet AN701 Datasheet
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Full PDF Text Transcription

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AN701 Vishay Siliconix Designing High-Frequency DC-to-DC Converters With the Si9114A Switchmode Controller INTRODUCTION Vishay Siliconix’s Si9100 monolithic switchmode PWM controller established the standard for low-power, highefficiency dc-to-dc converters. This versatile device integrates a number of useful features, including a power MOSFET, high-voltage start circuitry, and low power consumption. The Si9114A controller pushes the limits for high-frequency power conversion by further reducing delay times and adding additional features. As a result, dc-to-dc converters can be designed for frequencies up to 1 MHz with simple PWM topologies instead of the complex resonant ones.
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