Datasheet

LT3958
24
3958f
TYPICAL APPLICATIONS
10V to 40V Input, 48V Output Boost Converter
Effi ciency vs Output Current
High Voltage Flyback Power Supply
SENSE2
SENSE1
LT3958
L1
33µH
V
IN
SW
GND
FBX
RT SS
INTV
CC
EN/UVLO
SYNC
SGND
R4
53.6k
VC
3958 TA02a
D1
R3
392k
R
T
41.2k
300kHz
C
VCC
4.7µF
10V
X5R
C
SS
0.33µF
R
C
10k
C
C
10nF
R2
464k
R1
15.8k
C
OUT
4.7µF
50V
X5R
s2
V
OUT
48V
0.5A
V
IN
12V TO 40V
C
IN
4.7µF
50V
X5R
C
IN
, C
OUT
: MURATA GRM32ER71H475KA88L
D1: VISHAY SILICONIX 10BQ060
L2: VISHAY SILICONIX IHLP-4040DZ-11
OUTPUT CURRENT (mA)
0
70
EFFICIENCY (%)
75
80
85
90
95
100
100 200 300
400
3958 TA02b
500
V
IN
= 24V
SENSE2
FBX
SENSE1
LT3958
T1
1:10
V
IN
SW
GND
RT SS
INTV
CC
EN/UVLO
SYNC
SGND
10k
VC
3958 TA03
D1
DANGER! HIGH VOLTAGE OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
31.6k
140k
100kHz
4.7µF
10V
X5R
0.1µF
10k
10nF
10nF
100pF
1.5M
1.5M
16.2k
22Ω
C
OUT
68nF
s2
V
OUT
300V
10mA
V
IN
5.5V TO 12V
47µF
16V
s2
C
IN
: MURATA GRM32ER61C476M
C
OUT
: TDK C3225X7R2J683K
D1: VISHAY SILICONIX GSD2004S DUAL DIODE CONNECTED IN SERIES
T1: TDK DCT15EFD-U44S003
•
•
22Ω
220pF