MB39A119 Datasheet, PDF (33/53 Pages) Fujitsu Component Limited. – DC/DC Converter IC of Synchronous Rectification for charging Li-ion battery

MB39A119
■ APPLICATION EXAMPLE
R6
Q2-1 51kΩ Q2-2RS2
R39
16kΩ
R40
75kΩ
15mΩ
R15
24kΩ
R41
16kΩ
Hi Side only
ACIN
4
ACOK
5
<AC Comp.>
+
−
2.0V
XACOK
22
R34
100kΩ
CVM
VCC
6
1
<CV Comp.>
−
+
2.6V
C8
0.1µF
System
C21
0.1µF
R45
100kΩ
Q5
R46 56kΩ
+INC1
3
−INC1
2
VIN
R21
8V
24kΩ
−INE1
8
+INE1
~
25V
R20
20kΩ
C11 6800pF ⁷
R17
10kΩ
−INE2
R32 ¹³
100kΩ
R51
10Ω
A
OUTC2
C18 1500pF
9
R33
10kΩ +INC2 ₁₀
C22 0.22µF
B
R52 ^{R25 R26}
10Ω _{9.1kΩ15kΩ}
−INC2 ₁₁
+INE2
C23
12
0.22µF
14
FB123
SW4 SW3
C13 22pF
R28 R27 R24
2kΩ 16kΩ47kΩ
C14 22pF
R8
R18
33kΩ
300kΩ
−INE3 ₁₅
C12 330pF R10
100kΩ
SW3 SW4 lchg
OFF OFF 4A
OUTD ₁₆
ON OFF 2A
ON ON 0.4A
<Current Amp1>
+
−^×25
3.1V
100kΩ
<Error Amp1>
−
+
<Current
+ ^Amp2>
−^×24.5
<Error Amp2>
−
+
<Error Amp3>
−
+
4.2V
<SOFT>
VREF
0.1V _{<UV Comp.>}
+
−
−INC2
(V_O)
<PWM Comp.>
+
−
−2.5 V
−1.5 V
Off time
Control
H: ULVO,UV
release
Slope
Control
+
−
2.6V
5.0V
VB Reg.
Drv-1
Drv-2
C7
VB 1.0µF
25
D4
CB
28
C6
0.1µF
OUT-1
27
VS
26
OUT-2
24
C1
4.7µF
A
B
Q1-1
L1 ^lchg
V_O
5.2µH RS1
R2
33mΩ
15Ω
Q1-2 D1
C2
4.7µF
C3 C4 C5
4.7µF 4.7µF 4.7µF Battery
PGND
23
<UVLO> _VCC
UVLO
VB
UVLO
VREF
UVLO
Output voltage (Battery
voltage) is adjustable.
C9
0.22µF
CS
17
10µA
<Over Current Det.>
+INC2
−INC2
0.2V
(V_O)
CT
+
OUTC2 _−
0.3V <Sync Cnt.>
VCC
<OSC>
4.2V
bias
<REF>
VREF
5.0V
<CTL> _DC/DC ^{21 CTL}
ON/OFF
18
RT _R19
39kΩ
19
20
VREF
GND
C10
0.1µF
33