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R1243S - 30V Input 2A Buck DC/DC Converter

This page provides the datasheet information for the R1243S, a member of the R1243K 30V Input 2A Buck DC/DC Converter family.

Datasheet Summary

Features

  • The R1243x001A/C/E has a latch protection with 2 ms delay time, the R1243x001B/D has a fold-back protection that keep operating during short condition with lower operating frequency and limiting the LX current. The R1243x has a built-in soft-start time (Typ. 0.4 ms). In addition to this, the soft-start time is adjustable by adding an external capacitor. The R1243x has the FLG pin, which mainly monitors the FB pin voltage and gives a flag output by the Nch open drain if the abnormal condition is.

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Datasheet preview – R1243S

Datasheet Details

Part number R1243S
Manufacturer Nisshinbo
File Size 1.14 MB
Description 30V Input 2A Buck DC/DC Converter
Datasheet download datasheet R1243S Datasheet
Additional preview pages of the R1243S datasheet.

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  • R1243K - 30V Input 2A Buck DC/DC Converter
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  • R1240N001A - 1.2A 30 V Step-Down DC/DC Converter
  • R1240N001B - 1.2A 30 V Step-Down DC/DC Converter
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  • R1245K - 1.2A 30V Step-Down DC/DC Converter
  • R1245N - 1.2A 30V Step-Down DC/DC Converter

Full PDF Text Transcription

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R1243K is NRND product. R1243x Series 30 V Input 2 A Buck DC/DC Converter No.EA-206-241216 OUTLINE The R1243x is a CMOS-based step-down DC/DC converter with internal Nch high-side Tr. (0.175 Ω), which can provide the maximum 2 A output current. Internally, the R1243x consists of an oscillator, a PWM control circuit, a reference voltage unit, an error amplifier, phase compensation circuits, a slope circuit, a soft-start circuit, protection circuits, internal voltage regulators and a switch for bootstrap circuit. A step-down DC/DC converter can be configured by only adding an inductor, resistors, a diode and capacitors to the R1243x. The R1243x is a current mode operating type DC/DC converter that does not require external current sense resistor.
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