Datasheet

LTC1922-1
7
BLOCK DIAGRA
W
UVLO
SHUNT REG
10.25V “ON”
6V “0FF”
REF AND LDO
SLOPE
COMPENSATION
C
T
/R
13
6
4
15 11 20 1 9
2
7
3
5
12
19
+
–
18
17
8
10
16
14
PASSIVE
DELAY
SYNC
RECTIFIER
DRIVE
LOGIC
ACTIVE
DELAY
BLANK
FAULT
LOGIC
+
–
+
–
+
–
+
–
12µA
V
REF
BLANK
400mV
600mV
PULSE BY PULSE
CURRENT LIMIT
R
S
R
S
T
Q
QB
QB
Q
QB
SHUTDOWN
CURRENT LIMIT
0.4V
ERROR
AMPLIFIER
PHASE
MODULATOR
OSC
1.2V
1.2V
5V
V
CC
V
REF
C
T
SYNC SBUS
50k
14.9k
FB
COMP
RAMP
SS
R
LEB
CS
GND
PDLY
OUTA
OUTB
OUTE
OUTF
OUTC
OUTD
ADLY
1922 • BD
OUTA
OUTB
OUTC
OUTD
RAMP
COMP
OUTE
OUTF
CURRENT DOUBLER
ACTIVE DELAY
PASSIVE DELAY
1922 TD
NOTE: SHADED AREAS CORRESPOND TO POWER DELIVERY PULSES
TI I G DIAGRA
UWW