Datasheet

26
LTC1624
TYPICAL APPLICATIONS
U
SENSE
–

I
TH
/RUN
V
FB

GND

V
IN

BOOST
TG
SW
LTC1624
C4
100pF
C
IN1
, C
IN2

22µF
35V
× 2
V
IN

13V TO
28V
+V
IN
D1
MBRS340
C
B

0.1µF
C10
0.1µF
C11
0.1µF
C12
1µF
C9
100pF
C13
0.1µF
+V
IN
C5, 0.1µF
8
7
6
5
1
2
3
4
R
SENSE

0.033Ω
R1
3.92k
R6
10k
R7
56k
R8
1M
CURRENT
ADJ
R2
35.7k
R
C

10k
C
C

330pF
M1
C
OUT

100µF
16V
× 2
L1
27µH
R4
0.025Ω
V
OUT

12V
3A
1624 F21

C
IN1
, C
IN2
= KEMET T495X226M035AS
L1 = SUMIDA CDRH127-270
R
SENSE
= IRC LR2010-01-R033-F
R4 = IRC LR2010-01-R025-F
M1 = SILICONIX Si4412DY
Q2 = MOTOROLA MMBT A14

C14, 0.01µF
+
SENSE
I
OUT

GND
–IN

AVE
PROG
V
CC

+IN
1
2
3
4
8
7
6
5
LTC1620
OUT
NC/ADJ
GND
NC

IN
NC
NC
SHDN
1
2
3
4
8
7
6
5
LT1121-5
+
Q2
Figure 21. 12V/3A Adjustable Current Power Supply for Battery Charger or Current Source Applications