MB39A119 Datasheet, PDF (5/53 Pages) Fujitsu Component Limited. – DC/DC Converter IC of Synchronous Rectification for charging Li-ion battery

MB39A119
■ BLOCK DIAGRAM
Hi Side Only
ACIN
4
ACOK
5
<AC Comp.>
+
−
2.0 V
XACOK
22
+INC1 3
−INC1 ₂
−INE1 ⁸
+INE1 7
<Current Amp1>
+
×25
−
100 kΩ
3.1 V
<Error Amp1>
−
+
−INE2 13
OUTC2 9
<Current Amp2>
+INC2 10
−INC2 11
+
×24.5
−
+INE2 12
<Error Amp2>
−
+
FB123 14
CVM
6
<CV Comp.>
−
+
2.6 V
0.1 V <UV Comp.>
+
−
−INC2
(VO)
<PWM Comp.>
+
−
−2.5 V
−1.5 V
Off time
Control
H: UVLO, UV
release
VCC
1
5.0 V
VB Reg.
25 VB
258 CB
Drv-1
Drv-2
27 ^OUT-1
26 VS
24 OUT-2
23 PGND
−INE3 15
OUTD 16
<Error Amp3>
−
+
4.2 V
Slope
Control
<UVLO>
VCC-
UVLO
VB-
UVLO
VREF-
UVLO
<SOFT>
VREF
10 µA
CS 17
<Over Current Det.>
+
+INC2
−
−INC2
0.2 V ^(Vo)
CT
+
−
2.6 V
OUTC2 ⁺
0.3 V
−
VCC
<Synchronous Cnt.>
<OSC>
4.2 V
bias
<REF>
VREF
5.0 V
<CTL> _DC/DC 21 CTL
ON/OFF
18
19
20
RT
VREF GND
5