MB3889 Fujitsu Microelectronics, Inc., MB3889 Datasheet - Page 9

• Manufacturer Part Number: MB3889
• Description: 2-channel Dc/dc Converter Ic With Overcurrent Protection Symmetrical-phase Type
• Manufacturer: Fujitsu Microelectronics, Inc.

*: Standard design value
10. Error Amp
Block
[Error Amp]
11. PWM
Comparator
Block
[PWM Comp.]
12. Dead Time
Control Block
[DTC]
13. Output
Block
[Drive]
Parameter
Threshold
voltage
Input bias
current
Voltage gain
Frequency
bandwidth
Output voltage
Output source
current
Output sink
current
Threshold
voltage
Maximum duty
cycle
Output
current
Output voltage
(main side)
Output current
(synchronous
rectification
side)
(main side)
Symbol
I
I
I
SOURCE1
SOURCE2
SOURCE
I
I
V
V
V
V
V
V
I
BW
V
SINK1
SINK2
V
Dtr
A
SINK
I
FBH
OH1
TH1
TH2
FBL
OL1
B
TH
TL
V
17, 29 RT
17, 29
17, 29
17, 29
17, 29
19, 27
19, 27
1, 15
1, 15
1, 15
2, 14 DC
2, 14 A
2, 14
2, 14
2, 14 FB
2, 14 FB
2, 14 Duty cycle
2, 14 Duty cycle
Pin
No.
FB
Ta
FB
Ta
OUT1 12 V, CB 17 V,
VS
Duty
OUT1 17 V, CB 17 V,
VS
Duty
OUT1
CB
OUT1
CB
OUT2
Duty
OUT2
Duty
(t
(t
(t
(t
INE
V
1/ f
1/ f
1/ f
1/ f
0 dB
0 C to
2.4 V,
2.4 V,
2.4 V
2.4 V
47 k
12 V,
12 V,
17 V, VS
17 V, VS
Conditions
25 C
5
5
5
5
0 V
OSC
OSC
OSC
OSC
100 mA,
0 V,
5.1 V,
(VCC
100 mA,
0
Dtr
Duty)
Duty)
Duty)
Duty)
85 C
12 V
12 V
12 V, VB
1.221
1.218
0 mA, VREF
Min
150
V
3.2
1.7
60
75
730
2.5
CB
Value
1.230
1.230
900*
2.86
Typ
1.5*
100
250
900
V
3.4
1.8
700*
750*
40
81
V
110
0.9
0.9
CB
2
S
0 mA, Ta
MB3889
1.239
1.242
Max
3.00
200
87
V
(Continued)
1.4
1
S
25 C)
MHz
Unit
mV
mA
mA
mA
mA
mA
nA
dB
V
V
V
V
V
V
V
A
9