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Número de pieza
componentes Descripción
MB3882 Ver la hoja de datos (PDF) - Fujitsu
Número de pieza
componentes Descripción
Fabricante
MB3882
2-channel DC/DC Converter IC with Synchronous Rectifier
Fujitsu
MB3882 Datasheet PDF : 30 Pages
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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
V
FBH
V
FBL
Output source
current
I
SOURCE
6, 19
6, 19
6, 19 FB
=
1.6 V
2.2
2.5
V
0.8
1.0 V
−
100
−
45
µ
A
Output sink
current
I
SINK
6, 19 FB
=
1.6 V
1.5
9.0
mA
8.
PWM
Comparator
Block
[PWM Comp.]
Threshold
voltage
V
TL
6, 19 Duty cycle
=
0
%
V
TH
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 k
Ω
,
CT
=
470 pF
85
90
95
%
Output current
(main side)
I
SOURCE1
I
SINK1
8, 17
8, 17
Duty
≤
5
%
(t
=
1
/
f
OSC
×
Duty)
Duty
≤
5
%
(t
=
1
/
f
OSC
×
Duty)
−
700*
mA
900*
mA
10. Output
Block
[Drive]
Output voltage
(main side)
V
OH1
V
OL1
Output current
(synchronous
rectifier side)
I
SOURCE2
I
SINK2
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
/
f
OSC
×
Duty)
11, 14
Duty
≤
5
%
(t
=
1
/
f
OSC
×
Duty)
CB
−
CB
−
2.5
0.9
V
VS
+
0.9
VS
+
1.4
V
−
750*
mA
900*
mA
Output voltage
(synchronous
rectifier side)
V
OH2
V
OL2
11, 14 OUT2
= −
100 mA
11, 14 OUT2
=
100 mA
2.5
4.1
V
1.0
1.4 V
Diode voltage V
D
10, 15 VB
=
10 mA
0.9
1.1 V
* : Typical setting value
(Continued)
8
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