Fujitsu MB39A104 manual Usage Precaution, Ordering Information, Do not apply negative voltages

Page 34

MB39A104

■USAGE PRECAUTION

•Printed circuit board ground lines should be set up with consideration for common impedance.

•Take appropriate static electricity measures.

•Containers for semiconductor materials should have anti-static protection or be made of conductive material.

•After mounting, printed circuit boards should be stored and shipped in conductive bags or containers.

•Work platforms, tools, and instruments should be properly grounded.

•Working personnel should be grounded with resistance of 250 kΩ to 1 MΩ between body and ground.

•Do not apply negative voltages.

The use of negative voltages below –0.3 V may create parasitic transistors on LSI lines, which can cause abnormal operation.

■ORDERING INFORMATION

Part number

Package

Remarks

MB39A104PFV

24-pin plastic SSOP (FPT-24P-M03)

34

Image 34

Contents Description FeaturesPackage MB39A104 PIN AssignmentsPin No Symbol Descriptions PIN DescriptionBlock Diagram Absolute Maximum Ratings Parameter Symbol Condition Rating Unit Min MaxParameter Symbol Condition Value Unit Min Typ Recommended Operating ConditionsPin No Conditions Electrical CharacteristicsParameter Min Typ MaxParameter Symbol Pin No Conditions Value Unit MinTypical Characteristics Reference Voltage vs. Ambient TemperatureTriangular Wave Oscillation Frequency Power Dissipation vs. Ambient Temperature Functions Protection circuit operating function table Timer-latch overcurrent protection circuit block OCPUnder voltage lockout protection circuit Uvlo Operating circuitSetting the Output Voltage Setting the Triangular Oscillation FrequencySetting the SOFT-START and Discharge Times MB39A104 Treatment Without Using CS Terminal Without Setting Soft-Start TimeAbout TIMER-LATCH Protection Circuit Overcurrent detection circuitOvercurrent Protection Circuit Range of Operation Method to detect by mean currentTimer-latch short-circuit protection circuit Treatment Without Using Cscp Terminal Resetting the Latch of Each Protection CircuitEquivalent Circuit On Power on OFF Standby mode Parts List Component Specification VendorSelection of Components CH1CH2 = 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 VoltageSwitching Wave Form CH1 Do not apply negative voltages Usage PrecautionOrdering Information Part number Package RemarksPackage Dimensions IndexFujitsu Limited