Treatment Without Using CS Terminal | Fujitsu MB39A104 instruction

MB39A104

■TREATMENT WITHOUT USING CS TERMINAL

When not using the soft-start function, open the CS1 terminal (pin 11) and the CS2 terminal (pin 14) .

•Without Setting Soft-Start Time

“OPEN”	“OPEN”
11 CS1	CS2 14

16

Image 16

Fujitsu MB39A104 manual Treatment Without Using CS Terminal, Without Setting Soft-Start Time

Contents

Description FeaturesPackage MB39A104 PIN Assignments Pin No Symbol Descriptions PIN Description Block Diagram Parameter Symbol Condition Rating Unit Min Max Parameter Symbol Condition Value Unit Min TypAbsolute Maximum Ratings Recommended Operating Conditions Electrical Characteristics ParameterPin No Conditions Min Typ Max Parameter Symbol Pin No Conditions Value Unit Min Typical Characteristics Reference Voltage vs. Ambient Temperature Triangular Wave Oscillation Frequency Power Dissipation vs. Ambient Temperature Functions Timer-latch overcurrent protection circuit block OCP Under voltage lockout protection circuit UvloProtection circuit operating function table Operating circuit Setting the Output Voltage Setting the Triangular Oscillation Frequency Setting the SOFT-START and Discharge Times MB39A104 Treatment Without Using CS Terminal Without Setting Soft-Start Time About TIMER-LATCH Protection Circuit Overcurrent detection circuit Overcurrent Protection Circuit Range of Operation Method to detect by mean current Timer-latch short-circuit protection circuit Treatment Without Using Cscp Terminal Resetting the Latch of Each Protection Circuit Equivalent Circuit On Power on OFF Standby mode Parts List Component Specification Vendor Selection of Components CH1 CH2 = 3 2 ⋅ 0.05 ⋅ 0.174 = 0.078 W Example Peak-to-peak value ΔIL Di ≥ I O ⋅ 1 − ESR ≤ ΠfC L 050 491 ESR ≤ ΠfC L 033 364 Reference Data Total Efficiency vs. Input Voltage Switching Wave Form CH1 Usage Precaution Ordering InformationDo not apply negative voltages Part number Package Remarks Package Dimensions Index Fujitsu Limited