Datasheet

LTC3786
30
3786fa
applicaTions inForMaTion
Figure 15. Low I
Q
High Voltage Flyback Power Supply
SENSE
+
SENSE
–
TG
C
ITHA
100pF
LTC3786
C
SS
0.1µF
C
ITH
22nF
C
IN
22µF
×2
MBOT
C
INT
4.7µF
3786 F15
V
OUT
350V
10mA
V
IN
5V TO 12V
10nF
R
SENSE
15mΩ
BOOST
SW
VBIAS
BG
GND
PGOOD
INTV
CC
VFB
ITH
SS
16.2k
1%
1M
1%
1M
1%
1.5M
1%
100k
22Ω
220pF
R
ITH
8.66k
25k
f
SW
= 105kHz
FREQ
RUN
PLLIN/MODE
C
OUT
68nF
×2
D
T
1:10
C
IN
: TDK C3225X7R1C226M
C
OUT
: TDK C3225X7R2J683K
D: VISHAY SILICONIX GSD2004S DUAL DIODE CONNECTED IN SERIES
MBOT: VISHAY SILICONIX Si7850DP
T: TDK DCT15EFD-U44S003
DANGER HIGH VOLTAGE! OPERATION BY HIGH VOLTAGE TRAINED PERSONNEL ONLY
•
•
Figure 16. Low I
Q
Nonsynchronous 24V/2A Boost Converter
SENSE
+
SENSE
–
TG
C
ITHA
100pF
LTC3786
C
SS
0.1µF
C
ITH
22nF
C
IN
10µF
×2
MBOT
D
C
INT
4.7µF
3786 F15
V
OUT
24V
2A
V
IN
5V TO 24V
R
SENSE
6mΩ
L
10µH
BOOST
SW
VBIAS
BG
GND
PGOOD
INTV
CC
VFB
ITH
SS
12.1k
1%
100k
R
ITH
8.66k
232k
1%
FREQ
RUN
PLLIN/MODE
C
OUTA
10µF
C
OUTB
47µF
×4
+
C
IN
, C
OUTA
: MURATA GRM31CR61E106KA12
C
OUTB
: KEMET T495X476K035AS
D: ON SEMI MBRS340T3G
L: VISAY SILICONIX IHLP-5050FD-01 10µH
MBOT: VISHAY SILICONIX Si4840BDP