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SI9145 - Low-Voltage Switchmode Controller

Description

The Si9145 switchmode controller IC is ideally suited for high efficiency dc/dc converters in low input voltage systems.

Operation is guaranteed down to 2.7 V, with a minimum start-up voltage of 3.0 V making the Si9145 ideal for use with NiCd, NMH, and lithium ion battery packs.

Features

  • D D D D D D 2.7-V to 7-V Input Operating Range Voltage-Mode PWM Control High-Speed, Source-Sink Output Drive (200 mA) Internal Oscillator (up to 2 MHz) Standby Mode 0.
  • 100% Controllable Maximum Duty-Cycle.

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Datasheet Details

Part number SI9145
Manufacturer Vishay
File Size 74.89 KB
Description Low-Voltage Switchmode Controller
Datasheet download datasheet SI9145 Datasheet

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Full PDF Text Transcription

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Si9145 Vishay Siliconix Low-Voltage Switchmode Controller FEATURES D D D D D D 2.7-V to 7-V Input Operating Range Voltage-Mode PWM Control High-Speed, Source-Sink Output Drive (200 mA) Internal Oscillator (up to 2 MHz) Standby Mode 0−100% Controllable Maximum Duty-Cycle DESCRIPTION The Si9145 switchmode controller IC is ideally suited for high efficiency dc/dc converters in low input voltage systems. Operation is guaranteed down to 2.7 V, with a minimum start-up voltage of 3.0 V making the Si9145 ideal for use with NiCd, NMH, and lithium ion battery packs. A mode select pin allows the output driver polarity to be programmed allowing the device to function as a step-up or step-down converter.
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