MB3886 Fujitsu Microelectronics, Inc., MB3886 Datasheet - Page 8

• Manufacturer Part Number: MB3886
• Description: 2-channel Dc/dc Converter Ic With Overcurrent Protection Symmetrical-phase Type
• Manufacturer: Fujitsu Microelectronics, Inc.

8
MB3886
* : Typical design value
10. Soft-start
Circuit Block
[CS]
11. Error
Amp. Block
[Error Amp.]
12. PWM
Comparator
Block
[PWM Comp.]
13. Dead Time
Control Block
[DTC]
14. Output
Block [Drive]
Parameter
Charge current
Threshold
voltage
Input bias
current
Voltage gain
Frequency
bandwidth
Output voltage
Output source
current
Output sink
current
Threshold
voltage
Maximum duty
cycle
Output current
(main side)
Output voltage
(main side)
Output current
(synchronous
rectification
side)
Output voltage
(synchronous
rectification
side)
I
I
I
SOURCE1
SOURCE2
Sym-
SOURCE
I
I
V
V
V
V
V
V
V
BW
I
bol
V
V
V
SINK1
SINK2
Dtr
I
SINK
A
I
CS
TH1
TH2
OH1
OL1
OH2
OL2
FBL
FBH
B
TH
TL
V
11, 20 RT 9.1 k , CT 330 pF
11, 20
11, 20
11, 20
11, 20
14, 17
14, 17
14, 17 OUT2
14, 17 OUT2
7, 24
8, 23
8, 23
8, 23
9, 22 DC
9, 22 A
9, 22
9, 22
9, 22 FB
9, 22 FB
9, 22 Duty cycle
9, 22 Duty cycle
No.
Pin
FB
Ta
FB
Ta
Duty
Duty
OUT1
CB
OUT1
CB
Duty
Duty
(t
(t
(t
(t
INE
V
1 f
1 f
1 f
1 f
0 dB
0 C to 85 C
1.7 V,
1.7 V,
1.7 V
1.7 V
13.5 V, VS
13.5 V, VS
25 C
Conditions
5
5
5
5
(VCC
0 V
OSC
OSC
OSC
OSC
100 mA,
100 mA
100 mA,
100 mA
0
Dtr
Duty)
Duty)
Duty)
Duty)
12 V, VB
12 V
12 V
V
0 mA, VREF
1.2375
CB
1.241
Min
2.4
1.5
1.2
2.5
200
60
73
14
2.5 V
V
Values
1.2500
1.2500
CB
1500
S
2.02
900
900
Typ
100
2.7
0.8
9.0
1.3
4.1
1.0
700
750
100
78
10
20
0 mA, Ta
0.9 V
0.9
*
*
*
*
*
1.2625
1.259
S
Max
1.0
2.2
1.4
(Continued)
83
45
6
1.4
25 C)
Unit
kHz
mA
mA
mA
mA
mA
nA
dB
V
V
V
V
V
V
V
V
V
V
A
A