Pin Functional Description - Power integrations TOP100-4 Manual

TOP100-4
V C
CONTROL
Z C
SHUNT REGULATOR/
ERROR AMPLIFIER
I FB
OSCILLATOR
D MAX
CLOCK
SAW
R E
Figure 2. Functional Block Diagram.

Pin Functional Description

DRAIN Pin:
Output MOSFET drain connection. Provides internal bias
current during start-up operation via an internal switched high-
voltage current source. Internal current sense point.
CONTROL Pin:
Error amplifier and feedback current input pin for duty cycle
control. Internal shunt regulator connection to provide internal
bias current during normal operation. Trigger input for latching
shutdown. It is also used as the supply bypass and auto-restart/
compensation capacitor connection point.
SOURCE Pin:
Output MOSFET source connection. Primary-side circuit
common, power return, and reference point.
2
F
7 /09
SHUTDOWN/
AUTO-RESTART
+
-
5.7 V
-
4.7 V
+
5.7 V
POWER-UP
RESET
EXTERNALLY
TRIGGERED
SHUTDOWN
THERMAL
SHUTDOWN
-
+
PWM
COMPARATOR
0
INTERNAL
SUPPLY
1
÷ 8
R Q
S Q
S Q
R Q
Figure 3. Pin Configuration.
+
- V I
LIMIT
CONTROLLED
TURN-ON
GATE
DRIVER
LEADING
EDGE
BLANKING
MINIMUM
ON-TIME
DELAY
DRAIN
SOURCE (TAB)
CONTROL
TO-220/3 (YO3A)
PI-1065A-110194
DRAIN
SOURCE
PI-1746-011796