Datasheet

LT3757/LT3757A
30
3757afd
2ms/DIV
V
OUT
100V/DIV
3757 TA05b
5µs/DIV
V
OUT
5V/DIV
(AC)
V
SW
20V/DIV
3757 TA05c
Typical applicaTions
High Voltage Flyback Power Supply
Start-Up Waveforms Switching Waveforms
SENSE
LT3757
V
IN
V
SW
V
IN
5V TO 12V
C
IN
47µF
16V
×4
INTV
CC
C
OUT
68nF
×2
V
OUT
350V
10mA
0.02Ω
22Ω
M1
140k
100kHz
GATE
FBX
GND
SHDN/UVLO
DANGER! HIGH VOLTAGE OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
SYNC
RT
SS
V
C
•
•
105k
46.4k
0.1µF
220pF
100pF
6.8k
22nF
T1
1:10
D1
C
IN
: MURATA GRM32ER61C476K
C
OUT
: TDK C3225X7R2J683K
D1: VISHAY SILICONIX GSD2004S DUAL DIODE CONNECTED IN SERIES
M1: VISHAY SILICONIX Si7850DP
T1: TDK DCT15EFD-U44S003
3757 TA05a
1M
1%
1M
1%
1.50M
1%
16.2k
1%
10nF
C
VCC
47µF
25V
X5R
22Ω