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Contact Us

Discrete Divice

LVMOS

Planar LVMOS Normal Trench LVMOS Split Gate Trench LVMOS Automotive MOSFET

HVMOS

Planar HVMOS Multi-Epi DPMOS Trench DPMOS

IGBT

Planar IGBT Trench IGBT SiC Hybrid IGBT RC IGBT

SiC

SiC MOS

Diode

FRD

IPM

DIP2V/SOP2V

DIP-23/SOP-23

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IGBT Module

Industrial Module

Automobile module

AC-DC Converter

SSR Flyback Controller IC

PSR Flyback Controller IC

Synchronous Rectifier IC

Non-isolated BUCK/BUCK-BOOST IC

PFC IC

Fast Charging IC

Power Bank Fast Charger IC

Car Charger IC

AC-DC Fast Charging Protocol IC

DC-DC Converter

DC-DC Converter IC

PoE IC

LED Lighting Driver

Dimming LED Lighting Driver

Non-dimming LED Lighting Driver

Automotive LED Driver

Automotive Low-Voltage Motor Driver

Smart Power Switches

Gate Driver IC

Three-phase Half Bridge Driver

Single Half-bridge Driver

PFC IGBT Gate Driver

MEMS Sensor

Triaxial Acceleration Sensor

Six- Axis Inertial Sensor

Proximity Detection and Digital Ambient Light Sensor

Heart Rate Sensor

Silicon Microphone Sensor

MCU IC

8bit MCU

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Integrated Driver MCU

Digital Audio/Video

CD SERVO

Audio Decode

Audio Effects Processing

Intelligent Audio

ASIC

Bipolar PWM Controller

Bipolar DC-DC

LDO

Volume and Sound Control Circuit

DC Drive Circuit

Darlington Circuit

Logic & Switch & Level Shift

Operational Amplifier Circuit

Comparator

Reference IC

Linear Regulator

Audio Circuit

Interface ICs

LED Chip

GaN

GaAs

Discrete Divice

LVMOS

Planar LVMOS Normal Trench LVMOS Split Gate Trench LVMOS Automotive MOSFET

HVMOS

Planar HVMOS Multi-Epi DPMOS Trench DPMOS

IGBT

Planar IGBT Trench IGBT SiC Hybrid IGBT RC IGBT

SiC

SiC MOS

Diode

FRD

IPM

DIP2V/SOP2V

DIP-23/SOP-23

DIP-24

DIP-25

DIP-Q25A

SDIP-26

DIP-27

DIP-29

SOP-30

SOP-37

DIP-T46A

IGBT Module

Industrial Module

Automobile module

AC-DC Converter

SSR Flyback Controller IC

PSR Flyback Controller IC

Synchronous Rectifier IC

Non-isolated BUCK/BUCK-BOOST IC

PFC IC

Fast Charging IC

Power Bank Fast Charger IC

Car Charger IC

AC-DC Fast Charging Protocol IC

DC-DC Converter

DC-DC Converter IC

PoE IC

LED Lighting Driver

Dimming LED Lighting Driver

Non-dimming LED Lighting Driver

Automotive LED Driver

Automotive Low-Voltage Motor Driver

Smart Power Switches

Gate Driver IC

Three-phase Half Bridge Driver

Single Half-bridge Driver

PFC IGBT Gate Driver

MEMS Sensor

Triaxial Acceleration Sensor

Six- Axis Inertial Sensor

Proximity Detection and Digital Ambient Light Sensor

Heart Rate Sensor

Silicon Microphone Sensor

MCU IC

8bit MCU

32bit MCU

Integrated Driver MCU

Digital Audio/Video

CD SERVO

Audio Decode

Audio Effects Processing

Intelligent Audio

ASIC

Bipolar PWM Controller

Bipolar DC-DC

LDO

Volume and Sound Control Circuit

DC Drive Circuit

Darlington Circuit

Logic & Switch & Level Shift

Operational Amplifier Circuit

Comparator

Reference IC

Linear Regulator

Audio Circuit

Interface ICs

LED Chip

GaN

GaAs

SA3844

CURRENT MODE PWM CONTROLLER

Description Main feature Product specification classification Internal block diagram Technical documentation Relevant package outline drawing

The SA3844 provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N channel MOSFETs, is low in the off state.

Main feature

Optimized for off-line and DC to DC converts
Low start up current(<0.5mA)
Automatic feed forward compensation
Pulse-by-Pulse current limiting
Enhanced load response characteristics
Under-voltage lockout with hysteresis
Double pulse Suppression
High current totem pole output
Internally trimmed bandgap reference
500kHz operation

Ordering Information

Product Name	Package form	Marking	Hazardous Substance Control	Packing Type	Remarks
SA3844SA	SOP-8-225-1.27	SA3844	Halogen free	Tube
SA3844SATR	SOP-8-225-1.27	SA3844	Halogen free	Tape&Reel

Block Diagram

英文框圖.png

Documents

title	Types of	Size (KB)	date	Download the latest English version
SA3844 Datasheet		0	2021-01-28	SA3844 Datasheet

Packages

SOP-8-225-1.27

DIP-8-300-2.54

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