參數(shù)資料
型號: MB3885
廠商: Fujitsu Limited
英文描述: 1-channel DC/DC Converter IC with Synchronous Rectifier
中文描述: 1通道DC / DC變換器的同步整流集成電路
文件頁數(shù): 8/29頁
文件大小: 239K
代理商: MB3885
MB3885
8
(VCC
=
12 V, VB
=
0 mA, VREF
=
0 mA, Ta
=
+
25
°
C)
* : Standard design value
(Continued)
Parameter
Symbol Pin No.
Conditions
Value
Unit
Min.
Typ.
Max.
7.
Error Amp
Block
[Error Amp.]
Frequency
band width
BW
7
AV
=
0 dB
800*
kHz
Output voltage
V
FBH
7
2.2
2.5
1.0
V
V
FBL
7
0.8
V
Output source
current
I
SOURCE
7
FB
=
1.6 V
100
45
μ
A
Output sink
current
I
SINK
7
FB
=
1.6 V
1.5
9.0
mA
8.
PWM
Comparator
Block
[PWM Comp.1,
PWM Comp.2]
Threshold
voltage
V
TL
7
Duty cycle
=
0
%
1.2
1.3
V
V
TH
7
Duty cycle
=
Dtr
1.81
2.0
V
9.
Dead time
Adjustment
Block
[DTC]
Maximum
duty cycle
Dtr
13
RT
=
10 k
,
CT
=
470 pF
85
90
95
%
10. Output
Block
[Drive]
Output current
(main side)
I
SOURCE1
13
Duty
5
%
(t
=
1
/
f
OSC
×
Duty)
Duty
5
%
(t
=
1
/
f
OSC
×
Duty)
OUT1
=
100 mA,
CB
=
17 V, VS
=
12 V
OUT1
=
100 mA,
CB
=
17 V, VS
=
12 V
Duty
5
%
(t
=
1
/
f
OSC
×
Duty)
Duty
5
%
(t
=
1
/
f
OSC
×
Duty)
OUT2
=
100 mA
700*
mA
I
SINK1
13
900*
mA
Output voltage
(main side)
V
OH1
13
CB
2.5
CB
0.9
VS
+
0.9
V
V
OL1
13
VS
+
1.4
V
Output current
(synchronous
rectifier side)
I
SOURCE2
15
750*
mA
I
SINK2
15
900*
mA
Output voltage
(synchronous
rectifier side)
V
OH2
15
2.5
4.1
V
V
OL2
15
OUT2
=
100 mA
1.0
1.4
V
Diode voltage
V
D
12
VB
=
10 mA
0.9
1.1
V
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