MB3889 Fujitsu Microelectronics, Inc., MB3889 Datasheet - Page 19
MB3889
Manufacturer Part Number
MB3889
Description
2-channel Dc/dc Converter Ic With Overcurrent Protection Symmetrical-phase Type
Manufacturer
Fujitsu Microelectronics, Inc.
Datasheet
1.MB3889.pdf
(35 pages)
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TREATMENT OF UNUSED CS TERMINALS
When the soft-start function is not used, the CS1 terminal (pin 3) and CS2 terminal (pin 13) should be left open.
R1
R2
Open : CH ON
L : CH OFF
VTH
1.4 V
CTL2
CTL1
< Operation Without Soft-start Setting >
(CS2)
INE1
CS1
13
10
1
3
9
13
3
CTL1
VREF
CS1
CS2
<Soft-start circuit>
6 k
100 K
Buff
H
3 A
A
B
SW1 (SW2)
L priority
1.23 V
Discharge
Soft-start
Error Amp
MB3889
19
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