MB3882 datasheet(8/30 Pages) FUJITSU

8 / 30 page

MB3882

(VCC

= 12 V, VB = 0 mA, VREF = 0 mA, Ta = +25 °C)

* : Typical setting value

(Continued)

Parameter

Symbol Pin No.

Conditions

Value

Unit

Min.

Typ.

Max.

Error Amp

Block

[Error Amp.]

Frequency

band width

6, 19

= 0 dB



800*



kHz

Output voltage

VFBH

6, 19



2.2

2.5



VFBL

6, 19



0.8

1.0

Output source

current

ISOURCE

6, 19

= 1.6 V

−100

−45

µA

Output sink

current

ISINK

6, 19

= 1.6 V

1.5

9.0



PWM

Comparator

Block

[PWM Comp.]

Threshold

voltage

VTL

6, 19

Duty cycle

= 0%

1.2

1.3



VTH

6, 19

Duty cycle

= Dtr



1.81

2.0

Dead time

Adjustment

Block

[DTC]

Maximum

duty cycle

Dtr

8, 17

= 10 kΩ,

= 470 pF

10. Output

Block

[Drive]

Output current

(main side)

ISOURCE1

8, 17

Duty

≤ 5%

= 1 / fOSC × Duty)

−700*



ISINK1

8, 17

Duty

≤ 5%

= 1 / fOSC × Duty)



900*



Output voltage

(main side)

VOH1

8, 17

OUT1

= −100 mA,

= 17 V, VS = 12 V

−

2.5

−

0.9



VOL1

8, 17

OUT1

= 100 mA,

= 17 V, VS = 12 V



0.9

1.4

Output current

(synchronous

rectifier side)

ISOURCE2

11, 14

Duty

≤ 5%

= 1 / fOSC × Duty)

−750*



ISINK2

11, 14

Duty

≤ 5%

= 1 / fOSC × Duty)



900*



Output voltage

(synchronous

rectifier side)

VOH2

11, 14

OUT2

= −100 mA

2.5

4.1



VOL2

11, 14

OUT2

= 100 mA



1.0

1.4

Diode voltage

10, 15

= 10 mA



0.9

1.1

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