Rad-tolerant current mode PWM controller

The ST1843 and ST1845 ICs are rad-tolerant current mode PWM controllers providing an industry standard solution for the implementation of off-line or DC to DC fixed frequency current mode control schemes with a minimal external part count.

Its radiation hardness, hermetic packaging and its ESCC qualification make it an ideal choice for aerospace and other harsh environments.

Key Features

  • Oscillator frequency guaranteed at 250 kHz
  • Trimmed oscillator for precise frequency control
  • Current mode operation to 500 kHz automatic feed forward compensation
  • Latching PWM for cycle-by-cycle current limiting
  • Internally trimmed reference with undervoltage lockout
  • High current totem pole output
  • Undervoltage lockout with hysteresis
  • Low start-up and operating current
  • Hermetic package
  • 50 and 100 krad (Si)
  • SEL free @ 120 MeV/cm2/mg at 125 °C
  • ESCC qualified



Description バージョン サイズ
DS7312 DS7312: Rad-tolerant current mode PWM controller 3.0 1 MB
Technical Notes & Articles
Description バージョン サイズ
TN1181 TN1181: Engineering Model quality level 2.1 371 KB

Publications and Collaterals

Description バージョン サイズ
Aerospace and Hi-rel - ESCC, JANS & QML products 1.0 2 MB
サポート & コミュニティ

サンプル & 購入

製品型番 Marketing Status SMD PIN/Detailed Spec Quality Level EPPL Hi-Rel Package Lead Finish Packing Type Package: Product Marking ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
ST1845K1 Active - Engineering Model - Flat-8 Gold Carrier Tape ST1843FK1 NEC EAR99 FRANCE MORE INFO No availability reported, please contact our Sales office
ST1845RKG Active - According to ESCC - Flat-8 Gold Carrier Tape ST1845RKG NEC EAR99 FRANCE MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

品質 & 信頼性

製品型番 Marketing Status パッケージ Grade RoHS Compliance Grade Material Declaration**
ST1845K1 アクティブFLAT8 lead 8mm EMIndustrialN/A
ST1845RKG アクティブFLAT8 lead 8mm FPIndustrialN/A

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.