MB3882 Datasheet, PDF (8/30 Pages) Fujitsu Component Limited. – 2-channel DC/DC Converter IC with Synchronous Rectifier

MB3882
(VCC = 12 V, VB = 0 mA, VREF = 0 mA, Ta = +25 °C)
Parameter
Symbol Pin No.
Conditions
Min.
Value
Typ.
Unit
Max.
Frequency
band width
BW 6, 19 AV = 0 dB

800*
 kHz
7.
Error Amp
Block
[Error Amp.]
Output voltage
VFBH
VFBL
Output source
current
ISOURCE
6, 19

6, 19

6, 19 FB = 1.6 V
2.2
2.5

V

0.8
1.0 V
 −100 −45 µA
Output sink
current
ISINK
6, 19 FB = 1.6 V
1.5
9.0
 mA
8.
PWM
Comparator
Block
[PWM Comp.]
Threshold
voltage
VTL
6, 19 Duty cycle = 0%
VTH
6, 19 Duty cycle = Dtr
1.2
1.3

V

1.81 2.0 V
9.
Dead time
Adjustment
Block
[DTC]
Maximum
duty cycle
Dtr
8, 17
RT = 10 kΩ,
CT = 470 pF
85
90
95 %
Output current
(main side)
ISOURCE1
ISINK1
8, 17
8, 17
Duty ≤ 5%
(t = 1 / fOSC × Duty)
Duty ≤ 5%
(t = 1 / fOSC × Duty)
 −700*  mA

900*
 mA
10. Output
Block
[Drive]
Output voltage
(main side)
VOH1
VOL1
Output current
(synchronous
rectifier side)
ISOURCE2
ISINK2
8, 17
OUT1 = −100 mA,
CB = 17 V, VS = 12 V
8, 17
OUT1 = 100 mA,
CB = 17 V, VS = 12 V
11, 14
Duty ≤ 5%
(t = 1 / fOSC × Duty)
11, 14
Duty ≤ 5%
(t = 1 / fOSC × Duty)
CB − CB −
2.5
0.9

V

VS +
0.9
VS +
1.4
V
 −750*  mA

900*
 mA
Output voltage
(synchronous
rectifier side)
VOH2
VOL2
11, 14 OUT2 = −100 mA
11, 14 OUT2 = 100 mA
2.5
4.1

V

1.0
1.4 V
Diode voltage VD 10, 15 VB = 10 mA

0.9
1.1 V
* : Typical setting value
(Continued)
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