Fujitsu MB3788 manual Standard Characteristic Curves, TA = +25C Supply voltage VCC 8 12 16

Page 10

MB3788

STANDARD CHARACTERISTIC CURVES

1. Power current - supply voltage characteristic

2. Reference voltage - supply voltage characteristic

2.5

TA = +25°C

CTL1 = 6 V

2.0

 

Power 1.5

CTL1, 2 = 6 V

 

current

 

lCC (mA)1.0

 

0.5

 

0

 

5

4

Reference 3

voltage

VREF (V)

2

1

0

TA = +25°C

0

4

8

12

16

20

Supply voltage VCC (V)

0 4 8 12 16 20

Supply voltage VCC (V)

3.Reference voltage, output current setting pin voltage

4. Reference voltage - ambient temperature characteristic

- supply voltage characteristic

 

 

 

 

 

TA = +25°C

 

2.56

 

 

 

 

 

VCC = 6 V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

5

Reference 2.54

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCTL1, 2 = 6 V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

voltage

 

 

 

 

 

IOR = -1 mA

 

4

 

 

 

 

4

VREF (V)

2.52

 

 

 

 

 

 

 

 

Reference

 

 

 

 

VREF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.50

 

 

 

 

 

 

 

 

voltage

 

 

 

 

3

 

 

 

 

 

 

 

 

 

VREF (V)3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output

2.48

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

2

current

2.46

 

 

 

 

 

 

 

 

 

 

 

 

 

 

setting

 

 

 

 

 

 

 

 

1

 

 

 

 

1

pin voltage

2.44

 

 

 

 

 

 

 

 

 

 

 

 

VE (V)

 

 

 

 

 

 

 

 

 

 

 

 

 

VE

 

 

 

 

 

 

 

 

 

0

 

 

 

 

0

 

-60

-40

-20

0

20

40

60

80

100

 

 

 

 

 

 

 

Ambient temperature TA (°C)

 

0

1

2

3

4

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply voltage VCC (V)

5. Reference voltage - control voltage characteristic

6. Control current - control voltage characteristic

 

 

 

 

 

VCC = 6 V

 

 

 

 

 

 

VCC = 6 V

3.0

 

 

 

 

TA = +25°C

 

500

 

 

 

 

TA = +25°C

2.8

 

 

 

 

 

 

400

 

 

 

 

 

Reference

 

 

 

 

 

Control

 

 

 

 

 

 

voltage 2.6

 

 

 

 

 

current

300

 

 

 

 

 

VREF (V)

 

 

 

 

 

lCTL1 (A)

 

 

 

 

 

 

2.4

 

 

 

 

 

 

200

 

 

 

 

 

2.2

 

 

 

 

 

 

100

 

 

 

 

 

2.0

1

2

3

4

5

 

0

4

8

12

16

20

0

 

0

 

 

 

Control voltage VCTL1 (V)

 

 

 

 

Control voltage VCTL1 (V)

 

 

 

 

 

 

 

 

 

 

 

 

(Continued)

10

Image 10
Contents Description FeaturesPackage MB3788 PIN AssignmentPIN Description Pin No Pin name DescriptionsBlock Diagram MB3788Functional Description Timer and latch-type short-circuit protection circuit Low input voltage malfunction fail-safe circuitAbsolute Maximum Ratings Parameter Symbol Conditions Ratings Unit Min MaxParameter Symbol Conditions Values Unit Min Typ Max Recommended Operating ConditionsElectical Characteristics Parameter Symbol Conditions Value Unit Min Typ MaxPWM Standard Characteristic Curves TA = +25C Supply voltage VCC 8 12 16180 HOW to SET Output Voltage HOW to SET Output Current OFFLatch-Type Short-Circuit Protection Circuit Processing Without Using SCP PIN Processing without using SCP PinBasic Voltage-Drop Type DC/DC Converter Circuit DC/DC Converter a V φ Characteristic Measurement Diagram Application Circuit SCP Inpwm GNDOrdering Information Part number Package RemarksPackage Dimension IndexFujitsu Limited