Datasheet

LT4180
15
4180fb
For more information www.linear.com/4180
Typical applicaTions
3.3V Isolated Flyback Regulator
R17
10.7k
1%
R13 5.36k 1%
OV
FB
DIV0DIV1
V
IN
V
OUT
SS
V
IN
V
IN
V
IN
INTV
CC
INTV
CC2
V
PP
COMP GND DRAIN
DIV2
T1
4 3 2 1
PULSE ENGINEERING PA1277NL
PA1277NL
CHOLD1 CHOLD2GUARD2 GUARD3 GUARD4CHOLD3 CHOLD4
C15
0.1µF
4180 TA04
RUN
R
OSC
C
OSC
R10 2.74k 1%
SENSE
SPREAD
U1
LT4180EGN
C16
470pF
C14 470pF
C13 470pF
C12 47nF
C11
47pF
D1
BAV21W
D3
BAS516
Q1
Si4848DY
U3
PS2801-1
OUTPUT TO WIRING AND LOAD 3.3V, 3A 0.4Ω MAX R
WIRE
4 × 470µF, AUX TPSE 477M010R0050 LOAD CAPACITANCE
C5 1µF
R15 41.2k 1%
C17 15nF
R8 523Ω 1% R4 13.3k 1%
C6
1µF
R5
0.033
1%
RT
FB
SHDN/ UVLO
SYNC
GND
GATEVC
VC
VC
SENSE
C7 0.1µF
R16 36.5k 1%
R9 105k 1%
INTV
CC2
INTV
CC
R14 8.66k 1%
OSC
OSC
V
IN
18V TO 72V GND
1 2 3 5 6 7 8
5 6 7 8 3 2
D2
UPS840
C3 100µF 10V
100µF 10V
R2 10k
C2 4700pF
C
IN2
1µF 100V
C
IN1
1µF 100V
R6
9.1k
U2
LT3758
EMSE
R12
100Ω
C4
4.7µF
50V
C18
2200pF
250V
V
IN
R3
51.1 1%
R7, 1Ω
C8 0.01µF
R11 1.3k
C10 (OPT.)
R
CS1
0.033Ω