lt3573 Linear Technology Corporation, lt3573 Datasheet - Page 20

• Manufacturer Part Number: lt3573
• Description: Isolated Flyback Converter Without An Opto-coupler
• Manufacturer: Linear Technology Corporation

LT3573
TYPICAL APPLICATIONS
20
12V TO 24V
(*40V)
V
IN
V
5V
IN
3573 TA06
3573 TA05
C1
10
C1
10
R6
59k
R6
19.1k
μ
μ
F
F
R5
10k
R1
499k
R2
71.5k
R1
499k
R2
71.5k
R5
10k
C2
10nF
C2
10nF
SHDN/UVLO
TC
R
SS
SHDN/UVLO
TC
R
SS
ILIM
ILIM
VC
VC
3.3V Isolated Flyback Converter
R7
40.2k
12V Isolated Flyback Converter
R7
25.5k
C3
4700pF
C3
1500pF
LT3573
LT3573
GND
GND
V
V
IN
IN
T1: COILTRONICS VP1-0102-R
D1: B340A
D2: 1N4148
TEST
TEST
R
R
BIAS
BIAS
R
R
REF
V
SW
REF
SW
FB
IN
FB
C4
4.7μF
C6
0.22
C6
0.22
178k
76.8k
R4
6.04k
R4
6.04k
R3
R3
μ
μ
F
F
T1: PULSE PA2362NL
D1: B340A
D3: 1N4148
D2
OR COILCRAFT GA3429-BL
R8
2k
R8
2k
L1C
1.5
D2
D3
μ
24
58.5
H
μ
T1
H
μ
T1
H
4:1:1
3:1
*OPTIONAL THIRD
WINDING FOR
40V OPERATION
1.5
6.5
D1
μ
H
μ
D1
H
C5
47
C5
47
μ
V
3.3V, 1A
V
F
μ
OUT
OUT
V
12V, 400mA
V
F
OUT
OUT
+
–
–
3573f