LTC3726 Datasheet, PDF (7/16 Pages) Linear Technology – Secondary-Side Synchronous Forward Controller

BLOCK DIAGRA
LTC3726
I_S+
2×
11
+
32×
I_S–
–
10
2V
+
C
–
+
C
–
I_TH
5
0.60V
FB/PHASE
4
SLP
7
FS/SYNC
9
+
EA
–
g_m = 2.8mS
RUN/SS
MODE
3
DRIVE/DMAX
CONTROL
0.25V
+
C
–
2.5V
SLOPE
COMP 1
BLANK
OSC
AND _DMAX
PLL
I_TRP
WAIT
OVP
SKIP
BLANK
RESET
DOMINANT
R
Q
S
DMAX
PWM
+
OC
C
3.2V –
OVERCURRENT
RUN/SS
6
FB
V_CCUV
4V_SB
SOFT-
START
WAIT
UVLO
V_CCUV
REG
4V_SB
V_REF
V_CC
V_CC
WAIT
OVP
ZERO
CROSSING
DETECT
V_CC
DRIVER
ENCODING
AND
V_CC
LOGIC
DRIVE
TYPE
FG
2
PGND
13
SG
1
0.2V
SW
12
PT⁺
15
PGND
PT ^–
14
••
PULSE
XFMR
1.24V
V_CC
19
3726 BD
OC
GND
8
3726fb
7