Datasheet

LT3580
21
3580fg
TYPICAL APPLICATIONS
High Voltage Positive Power Supply Uses Tiny 5.8mm × 5.8mm × 3mm Transformer and Switches at 200kHz
Danger High Voltage! Operation by High Voltage Trained Personnel Only
Start-Up Waveforms
Switching Waveforms
C2
68nF
FOR ANY V
OUT
BETWEEN 50V TO
350V, CHOOSE R
FB
ACCORDING TO
FOR 5V INPUT, KEEP MAXIMUM
OUTPUT POWER AT 1.58W
FOR 3.3V INPUT, KEEP MAXIMUM
OUTPUT POWER AT 0.88W
*MAY REQUIRE MULTIPLE SERIES
RESISTORS TO COMPLY WITH
MAXIMUM VOLTAGE RATINGS
V
OUT
350V
4.5mA (V
IN
= 5V)
2.5mA (V
IN
= 3.3V)
T1
1:10.4
D1
R
FB
4.22M*
V
IN
3.3V TO 5V
V
IN
SW
3580 TA05a
LT3580
D2
464k
10k
SHDN
GND
7, 8
5, 6
1
4
FB
VC
SYNC SS
RT
10nF
100pF
0.47μF
C1
2.2μF
C1: 2.2μF, 25V, X5R, 1206
C2: TDK C3225X7R2J683M
D1: VISHAY GSD2004S DUAL DIODE CONNECTED IN SERIES
D2: ON SEMICONDUCTOR MBR0540
T1: TDK LDT565630T-041
•
•
V
OUT
– 1.215
83.3μA
R
FB
=
4.7μH
I
PRIMARY
1A/DIV
V
OUT
50V/DIV
2ms/DIV5V INPUT
NO LOAD
3580 TA05b
I
PRIMARY
1A/DIV
V
OUT
2V/DIV
AC COUPLED
2μs/DIV5V INPUT
4.5mA LOAD
3580 TA05c
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