LTC1435A View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1435A' PDF : 20 Pages View PDF
LTC1435A
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
LT1620
1
SENSE
2
IOUT
3
GND
4
NIN
8
AVG
7
PROG
6
VCC
5
PIN
C15
0.1µF
C10
100pF
C16
0.33µF
C4
C11
0.1µF
56pF
LTC1435A
1
16
COSC
TG
2
15
RUN/SS BOOST
3
14
ITH
SW
4
13
SFB
VIN
5
12
SGND INTVCC
6
11
VOSENSE BG
7
SENSE –
10
PGND
8 SENSE + EXTVCC 9
C17
0.01µF
R6
C18
10k
0.1µF
1%
C5
0.1µF
D1
C6
D2 0.33µF
C7
+ 4.7µF
16V
R3
105k
0.1%
JP1A
R4
76.8k
0.1%
JP1B
E5
GND
RPROG
E4
IPROG
*CONSULT CAPACITOR MANUFACTURER FOR RECOMMENDED
ESR RATING FOR CONTINUOUS 4A OPERATION
Q1
Si4412DY
L1
27µH
Q2
Si4412DY
R1
0.025Ω
+
C3
22µF
35V
C8
100pF
R2
1M
0.1%
1435A TA06
E6
BATT
E7
GND
Current Programming Equation
IBATT
=
(IPROG)(R6) –
10(R1)
0.04
Efficiency
100
VIN = 24V
VBATT = 16V
95
VBATT = 12V
90
VBATT = 6V
85
80
75
0
1
2
3
4
5
BATTERY CHARGE CURRENT (A)
1435A TA05
18
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