PI3101 Datasheet, PDF (3/18 Pages) Vicor Corporation – 36-75V Input, 3.3V / 18A / 60W Output Very High Density Isolated DC-DC Converter (400W/in3)

Functional Block Diagram
START
BIAS
RUN
BIAS
Vcc
+IN
ZVS POWER
TRAIN
Driver
Synchronous
Rectifier
Driver
+OUT
-OUT
ZVS
ZVS POWER
TRAIN
Fast Current Limit
+
-
-IN
DC
FB _{Output OVP}
+
-
FB
DC
ENABLE
+
DC
-
-
DC
+
Period Ramp
-
+
On-Duty Ramp
LFF
DC ^{Slow Current Limit}
+
-
Timing
Logic
FB
+
-
TM
TRIM/SS
SGND
CFB2
CFB1
RFB1
+
-
Error Amp
EA Fault
+
-
DC
RSS
CSS INT
VREF
1.22V
Fault
Reset
Enable
+
-
DC
ENB
+5V
Input UVP
+
-
DC
Input OVP
+
-
120us
delay
DC
120us
delay
Over Temp
+
-
DC
ENB
Temp
Sensor
Figure 3 PI3101 Functional Block Diagram
Fault
Latch
And
Reset
Logic
Picor Corporation • picorpower.com
PI3101-00-HVIZ Rev 1.1, April 29^th, 2010 Page 3 of 18