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ST1845 - (ST1843 / ST1845) Rad-tolerant current mode PWM controller

Download the ST1845 datasheet PDF. This datasheet also covers the ST1843 variant, as both devices belong to the same (st1843 / st1845) rad-tolerant current mode pwm controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The ST1843HR and ST1845HR ICs are radtolerant current mode PWM controllers providing an industry standard solution for the implementation of provides the off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count.

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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (ST1843_STMicroelectronics.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number ST1845
Manufacturer STMicroelectronics
File Size 596.88 KB
Description (ST1843 / ST1845) Rad-tolerant current mode PWM controller
Datasheet download datasheet ST1845 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
ST1843 ST1845 Rad-tolerant current mode PWM controller 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 www.DataSheet.