Fujitsu MB39A104 manual Absolute Maximum Ratings, Recommended Operating Conditions

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MB39A104

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol

Condition

 

Rating

Unit

 

 

 

Min

 

Max

 

 

 

 

 

 

 

 

 

 

 

 

Power supply voltage

VCC

VCC, VCCO terminal

 

20

V

 

 

 

 

 

 

 

Output current

IO

OUT1, OUT2 terminal

 

60

mA

 

 

 

 

 

 

 

Output peak current

IOP

Duty 5% (t = 1/fOSCDuty)

 

700

mA

 

 

 

 

 

 

 

Power dissipation

PD

Ta ≤ +25 °C

 

740*

mW

 

 

 

 

 

 

 

Storage temperature

TSTG

55

 

+125

°C

 

 

 

 

 

 

 

* : The packages are mounted on the epoxy board (10 cm 10 cm).

WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.

RECOMMENDED OPERATING CONDITIONS

Parameter

Symbol

Condition

 

Value

 

Unit

 

 

 

Min

Typ

Max

 

 

 

 

 

 

 

 

 

 

 

Power supply voltage

VCC

VCC, VCCO terminal

7

12

19

V

 

 

 

 

 

 

 

Reference voltage output current

IREF

VREF terminal

1

0

mA

 

 

 

 

 

 

 

VH output current

IVH

VH terminal

0

30

mA

 

 

 

 

 

 

 

Input voltage

VINE

INE1, INE2 terminal

0

VCC 0.9

V

 

 

 

 

 

 

VDTC

DTC1, DTC2 terminal

0

VCC 0.9

V

 

 

 

 

 

 

 

 

Control input voltage

VCTL

CTL terminal

0

19

V

 

 

 

 

 

 

 

Output current

IO

OUT1, OUT2 terminal

45

+45

mA

 

 

 

 

 

 

 

Output Peak current

IOP

Duty 5% (t = 1/fOSCDuty)

450

+450

mA

 

 

 

 

 

 

 

 

 

Overcurrent detection

100

500

1000

kHz

Oscillation frequency

fOSC

by ON resistance of FET

 

 

 

 

 

 

 

 

 

 

 

 

 

*

100

500

1500

kHz

 

 

 

 

 

 

 

Timing capacitor

CT

39

100

560

pF

 

 

 

 

 

 

 

Timing resistor

RT

11

24

130

kΩ

 

 

 

 

 

 

 

VH terminal capacitor

CVH

VH terminal

0.1

1.0

F

 

 

 

 

 

 

 

Soft-start capacitor

CS

CS1, CS2 terminal

0.1

1.0

F

 

 

 

 

 

 

 

Short-circuit detection capacitor

CSCP

CSCP terminal

0.1

1.0

F

 

 

 

 

 

 

 

Reference voltage output

CREF

VREF terminal

0.1

1.0

F

capacitor

 

 

 

 

 

 

 

 

 

 

 

 

 

Operating ambient temperature

Ta

30

+25

+85

°C

 

 

 

 

 

 

 

* : See“ SETTING THE TRIANGULAR OSCILLATION FREQUENCY”.

WARNING: The recommended operating conditions are required in order to ensure the normal operation of the semiconductor device. All of the device’s electrical characteristics are warranted when the device is operated within these ranges.

Always use semiconductor devices within their recommended operating condition ranges. Operation outside these ranges may adversely affect reliability and could result in device failure.

No warranty is made with respect to uses, operating conditions, or combinations not represented on the data sheet. Users considering application outside the listed conditions are advised to contact their FUJITSU representatives beforehand.

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Contents Package FeaturesDescription PIN Assignments MB39A104PIN Description Pin No Symbol DescriptionsBlock Diagram Parameter Symbol Condition Value Unit Min Typ Parameter Symbol Condition Rating Unit Min MaxAbsolute Maximum Ratings Recommended Operating ConditionsParameter Electrical CharacteristicsPin No Conditions Min Typ MaxPin No Conditions Value Unit Min Parameter SymbolReference Voltage vs. Ambient Temperature Typical CharacteristicsTriangular Wave Oscillation Frequency Power Dissipation vs. Ambient Temperature Functions Under voltage lockout protection circuit Uvlo Timer-latch overcurrent protection circuit block OCPProtection circuit operating function table Operating circuitSetting the Triangular Oscillation Frequency Setting the Output VoltageSetting the SOFT-START and Discharge Times MB39A104 Without Setting Soft-Start Time Treatment Without Using CS TerminalOvercurrent detection circuit About TIMER-LATCH Protection CircuitMethod to detect by mean current Overcurrent Protection Circuit Range of OperationTimer-latch short-circuit protection circuit Resetting the Latch of Each Protection Circuit Treatment Without Using Cscp TerminalEquivalent Circuit On Power on OFF Standby mode Component Specification Vendor Parts ListCH1 Selection of ComponentsCH2 = 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 Total Efficiency vs. Input Voltage Reference DataSwitching Wave Form CH1 Ordering Information Usage PrecautionDo not apply negative voltages Part number Package RemarksIndex Package DimensionsFujitsu Limited