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SG1845 - Current Mode PWM Controller

Download the SG1845 datasheet PDF. This datasheet also covers the SG1844 variant, as both devices belong to the same current mode pwm controller family and are provided as variant models within a single manufacturer datasheet.

Description

The SG1844/45 family of control ICs provides all the required

Features

  • to implement off-line Fixed Frequency, Current-mode switching power supplies with a minimum number of external components. Current-mode architecture demonstrates improved line regulation, improved load regulation, pulse-by pulse current limiting and inherent protection of the power supply output switch. The Bandgap reference is trimmed to ±1% over temperature. Oscillator discharge current is trimmed to less than ±10%. The SG1844/45 has under-voltage lockout, current-limiting circuitry and start-.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (SG1844-Microsemi.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
SG1842 CURRENT MODE PWM CONTROLLER Linfinity
SG1843 CURRENT MODE PWM CONTROLLER Microsemi Corporation
SG1843 CURRENT MODE PWM CONTROLLER Linfinity
SG1825 HIGH - SPEED CURRENT - MODE PWM Microsemi Corporation
SG1825C HIGH - SPEED CURRENT - MODE PWM Microsemi Corporation

Other Datasheets by Microsemi (Microchip)

Part Number Description
SG1842 Current Mode PWM Controller
SG1844 Current Mode PWM Controller
SG1524 Regulating Pulse Width Modulator
SG1524B Regulatating Pulse Width Modulator
SG1525A Regulating Pulse Width Modulator

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
SG1844/SG1845/SG3844/SG3845 Current Mode PWM Controller Description The SG1844/45 family of control ICs provides all the required features to implement off-line Fixed Frequency, Current-mode switching power supplies with a minimum number of external components. Current-mode architecture demonstrates improved line regulation, improved load regulation, pulse-by pulse current limiting and inherent protection of the power supply output switch. The Bandgap reference is trimmed to ±1% over temperature. Oscillator discharge current is trimmed to less than ±10%. The SG1844/45 has under-voltage lockout, current-limiting circuitry and start-up current of less than 1mA. The totem-pole output is optimized to drive the gate of a power MOSFET.
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