Power integrations TOPSwitch-HX Series - Functional Block Diagram

Rev. J 08/16
4
TOP252-262
www.power.com
Figure 3a. Functional Block Diagram (P and G Packages).
Figure 3b. Functional Block Diagram (M Package).
PI-4643-040507
SHUTDOWN/
AUTO-RESTART
CLOCK
CONTROLLED
TURN-ON
GATE DRIVER
CURRENT LIMIT
COMPARATOR
INTERNAL UV
COMPARATOR
INTERNAL
SUPPLY
5.8 V
4.8 V
SOURCE (S)
SOURCE (S)
S
R
Q
D
MAX
STOP
SOFT
START
CONTROL (C)
VOLTAGE
MONITOR (V)
-
+
5.8 V
I
FB
1 V
Z
C
V
C
+
-
+
-
+
-
LEADING
EDGE
BLANKING
÷ 16
1
HYSTERETIC
THERMAL
SHUTDOWN
SHUNT REGULATOR/
ERROR AMPLIFIER
+
-
DRAIN (D)
ON/OFF
DC
MAX
DC
MAX
0
OV/
UV
OVPV
V
I (LIMIT)
CURRENT
LIMIT
ADJUST
V
BG
+ V
T
LINE
SENSE
SOFT START
OFF
F REDUCTION
F REDUCTION
STOP LOGIC
EXTERNAL
CURRENT
LIMIT (X)
OSCILLATOR
WITH JITTER
PWM
I
PS(UPPER)
I
PS(LOWER)
SOFT START
I
FB
I
PS(UPPER)
I
PS(LOWER)
I
PS(UPPER)
I
PS(LOWER)
PI-4508-120307
SHUTDOWN/
AUTO-RESTART
CLOCK
CONTROLLED
TURN-ON
GATE DRIVER
CURRENT LIMIT
COMPARATOR
INTERNAL UV
COMPARATOR
INTERNAL
SUPPLY
5.8 V
4.8 V
K
PS(UPPER)
K
PS(LOWER)
SOURCE (S)
SOURCE (S)
S
R
Q
D
MAX
STOP
SOFT
START
CONTROL (C)
MULTI-
FUNCTION (M)
-
+
5.8 V
I
FB
Z
C
V
C
+
-
+
-
+
-
LEADING
EDGE
BLANKING
÷ 16
1
HYSTERETIC
THERMAL
SHUTDOWN
SHUNT REGULATOR/
ERROR AMPLIFIER
+
-
DRAIN (D)
ON/OFF
DC
MAX
DC
MAX
0
OV/
UV
OVPV
V
I (LIMIT)
CURRENT
LIMIT
ADJUST
V
BG
+ V
T
LINE
SENSE
SOFT START
SOFT START
I
FB
I
PS(UPPER)
I
PS(LOWER)
K
PS(UPPER)
K
PS(LOWER)
OFF
F REDUCTION
F REDUCTION
STOP LOGIC
OSCILLATOR
WITH JITTER
PWM