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S$5.23
R1244N001B-TR-FE Power Chip SOT-23-6 Packaging Silk Screen Printing 7007A
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Product description
The R1244N001B Is A DC/DC Converter Built-In Based On The CMOS Process Switch.The The Conductive Resistance Of The Built-In Upper Switch Is 0.35Ω (Typical Value), Which Can Provide A Current Up To 1.2A.This Chip Consists Of Oscillating Circuit, PWM Control Circuit, Base Voltage Source, Error Amplifier, Phase Compensation Circuit, Slope Circuit, Soft Start Circuit, Protection Circuit, Internal Voltage Regulator, Switch, Etc., External Devices Use Inductance, Resistance, Diode, Capacitance, All Of Which Form A Complete Step-Down DC/DC Converter.
Since The Current Limit Mode Of R1244N001B Does Not Need To Monitor The Resistance When Working, It Can Achieve Its Function At High Speed And Efficiency.Output Capacitor Select Ceramic Capacitor.The Switch Frequency Is Fixed From The Inside To 1.25MHz.As A Protection Function, There Is A Spike Current Function That Limits Each Cycle, The Switch Frequency Is Limited To The Original 1/4 Of The Switching Frequency When The Output Is Short-Circuited, The Thermal Shutdown Function, Under Voltage Lock (UVLO) Function.
Features
Working Voltage Range 4.5V~30V
Built-in N-Type Driver Typical Value RON = 0.35Ω
Output Voltage Range External Resistance Adjustable 0.8V~15V Can Be Set
Feedback Voltage 0.8V ±1.5%
Spike Current Limit Typical Value 2.0A
Under Voltage Lock (UVLO) Function
Switch Frequency 1.25MHz (310kHz When The Function Is Folded Back)
Ceramic Capacitor Can Be Used As Input And Output Capacitor
Standby Current Typical Value 0μA
Application
Digital Home Appliances Such As Digital Tv, DVD Players
Office Automation Machines Such As Printers, FAX
Constant Voltage Source Of Portable Communication Machine, Camera, Video Recorder
Use The Constant Voltage Source Of The Battery Storage Machine
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