Datasheet

LT8582
33
8582f
TYPICAL APPLICATIONS
SuperCap Backup Power
Input Removed, Holdup for ~110s with 500mA LoadCharging SuperCaps
System Level Diagram
GATE
SEPIC
8582 TA05b
V
OUT1
SUPERCAPS
V
IN1
V
IN
BOOST
V
OUT2
V
OUT
V
IN2
SWB2
SWA2
SWB1
SWA1
LT8582
8582 TA05a
PG1
SYNC1
CLKOUT1
CLKOUT2
73.2k
SYNC2
PG2
V
IN2
SHDN2
V
IN1
SHDN1
V
C1
SS1
RT1
GND
RT2
SS2
GATE2
V
C2
FBX2
FBX1
GATE1
V
OUT1
10V
V
OUT
V
IN
(V
IN
> 11.4V)
11V (V
IN
< 11.4V)
V
IN
12V ±5%
V
OUT1
0.47µF
0.47µF
1nF
100pF
100pF
12.7k
15.4k
100k
100k
105k
L3
2.2µH
L1
5µH
L2
5µH
3.3nF
C
S4
60F
1.2k
1/4W
130k
M1
C
OUT3
22µF
×2
C
OUT2
10µF
11k
80.6k
80.6k
C
IN2
4.7µF
C
IN1
, C
IN2
: 4.7µF, 16V, X7R, 1206
C
OUT1
: 4.7µF, 25V, X7R, 1206
C
OUT2
: 10µF, 25V, X7R, 1210
C
OUT3
: 22µF, 16V, X7R, 1210
C1: 2.2µF, 25V, X7R, 0805
C
S1
TO C
S4
: 60F, 2.5V, COOPER HB1840-2R5606-R
D1, D2: CENTRAL SEMI CTLSH5-40M833
L1, L2: COOPER CTX5-1A
L3: COOPER HCM0703-2R2
M1: VISHAY SI7123DN
C1
2.2µF
D1
C
IN1
4.7µF
C
OUT1
4.7µF
D2
s
s
C
S3
60F
1.2k
1/4W
C
S2
60F
1.2k
1/4W
C
S1
60F
1.2k
1/4W
6.04k
V
OUT
≈ V
IN
5V/DIV
V
OUT1
5V/DIV
I
L3
2A/DIV
I
L1
+ I
L2
2A/DIV
25s/DIV
8582 TA05c
V
OUT
≈ 11V
5V/DIV
V
OUT1
5V/DIV
I
L3
2A/DIV
I
L1
+ I
L2
2A/DIV
25s/DIV
8582 TA05d