LTC1435I View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1435I' PDF : 20 Pages View PDF
LTC1435
TYPICAL APPLICATIONS
Constant-Current/Constant-Voltage High Efficiency Battery Charger
E1
VIN
E3
GND
E3
SHDN
R5
1k
+ C1* + C2*
22µF
22µF
35V
35V
R7
1.5M
C13
0.033µF
C14
1000pF
C12
0.1µF
C9
100pF
U2
LT1620
1
SENSE
2
IOUT
3
GND
4
NIN
8
AVG
7
PROG
6
VCC
5
PIN
C15
0.1µF
C10
100pF
C4
C11
0.1µF
56pF
1
16
COSC
TG
2
15
RUN/SS BOOST
3
ITH
U1
14
SW
4
LTC1435 13
SFB
VIN
5
12
SGND INTVCC
6
11
VOSENSE BG
7
SENSE –
10
PGND
8 SENSE + EXTVCC 9
C5
0.1µF
D1
C6
D2 0.33µF
C7
+ 4.7µF
16V
Q1
Si4412DY
L1
27µH
Q2
Si4412DY
C8
100pF
R2
1M
0.1%
C17
0.01µF
C16
0.33µF
R6
10k
1%
C18
0.1µF
R3
105k
0.1%
JP1A
R4
76.8k
0.1%
JP1B
E5
E4
GND
RPROG
IPROG
*CONSULT CAPACITOR MANUFACTURER FOR RECOMMENDED
ESR RATING FOR CONTINUOUS 4A OPERATION
R1
0.025Ω
+
C3
22µF
35V
DC133 F01
E6
BATT
E7
GND
Current Programming Equation
IBATT
=
(IPROG)(R6) –
10(R1)
0.04
18
100
VIN = 24V
95
90
85
Efficiency
VBATT = 16V
VBATT = 12V
VBATT = 6V
80
75
0
1
2
3
4
5
BATTERY CHARGE CURRENT (A)
1435 TA05
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