Datasheet

LT8582
31
8582f
TYPICAL APPLICATIONS
VFD (Vacuum Fluorescent Display) and Filament Power Supply Switches at 1MHz
Efficiency and Power Loss
(V
IN
= 12V with Load on 10.5V Output)
Efficiency and Power Loss
(V
IN
= 12V with Load on 100V Output)
OUTPUT POWER (W)
0
50
EFFICIENCY (%)
POWER LOSS (W)
80
70
4
6
8582 TA03b
60
2
8
10
90
0.4
1.6
1.2
0.8
2.0
LOAD CURRENT (A)
0
20
EFFICIENCY (%)
POWER LOSS (W)
80
70
60
50
0.4
0.6
8582 TA03c
40
30
0.2
0.8
1
100
90
0
0.2
1.2
1.4
0.8
1.0
0.4
0.6
1.6
SWB2
SWA2
SWB1
SWA1
LT8582
8582 TA03a
PG1
SYNC1
CLKOUT1
CLKOUT2
576k
100k
SYNC2
PG2
V
IN2
SHDN2
V
IN1
SHDN1
V
C1
SS1
RT1
GND
RT2
SS2
GATE2
V
C2
FBX2
FBX1
GATE1
V
OUT3
10.5V
0.85A
C7
2.2µF
V
IN
9V TO 16V
2.2µF
2.2µF
1.5nF
47pF
47pF
11.8k
21k
100k
576k
113k
L2
10µH
s
L1
22µH
1.5nF
8.06k**
D7**
C8
10µF
×2
C2
2.2µF
383k
80.6k
80.6k
C
IN2
4.7µF
C
IN1
, C
IN2
: 4.7µF, 25V, X7R, 1206
C1 TO C6: 2.2µF, 50V, X7R, 1206
C7: 2.2µF, 25V, X7R, 0805
C8: 10µF, 25V, X7R, 1210
D1 TO D6: CENTRAL SEMI CMMSH2-40
D7: CENTRAL SEMI CMHZ5240B
D8: CENTRAL SEMI CTLSH5-40M833
D9: CENTRAL SEMI CTLSH2-40M832
L1: WÜRTH 744771122
L2, L3: WÜRTH 744870100
M1: VISHAY SI7611DN
*CHANNEL 1 MAX OUTPUT POWER 8W
**OPTIONAL FOR OUTPUT SHORT PROTECTION
C1
2.2µF
D1
D2
D3
D5
D6
D4
D8**
M1**
C3
2.2µF
C4
2.2µF
C5
2.2µF
V
OUT2
66V
120mA*
V
OUT1
100V
80mA*
C6
2.2µF
C
IN1
4.7µF
D9
L3
10µH
s