TOP266EG/VG POWERINT [Power Integrations, Inc.], TOP266EG/VG Datasheet - Page 3

• Manufacturer Part Number: TOP266EG/VG
• Description: Integrated Off-Line Switcher with EcoSmart Technology for Highly Efficient Power Supplies
• Manufacturer: POWERINT [Power Integrations, Inc.]

Figure 2.
Pin Functional Description
DRAIN (D) Pin:
High-voltage power MOSFET DRAIN pin. The internal start-up
bias current is drawn from this pin through a switched high-
voltage current source. Internal current limit sense point for
drain current.
CONTROL (C) Pin:
Error amplifier and feedback current input pin for duty cycle
control. Internal shunt regulator connection to provide internal
bias current during normal operation. It is also used as the
connection point for the supply bypass and auto-restart/
compensation capacitor.
EXTERNAL CURRENT LIMIT (X) Pin:
Input pin for external current limit adjustment remote
ON/OFF and device reset. A connection to SOURCE pin
disables all functions on this pin.
VOLTAGE MONITOR (V) Pin:
Input for OV, UV, line feed forward with DC
overvoltage protection (OVP), remote ON/OFF. A connection to
the SOURCE pin disables all functions on this pin.
FREQUENCY (F) Pin:
Input pin for selecting switching frequency 132 kHz if connected
to SOURCE pin and 66 kHz if connected to CONTROL pin.
www.powerint.com
FREQUENCY (F)
EXTERNAL CURRENT
CONTROL (C)
MONITOR (V)
VOLTAGE
LIMIT (X)
Functional Block Diagram (E and V Package).
Z
C
SHUNT REGULATOR/
I
ERROR AMPLIFIER
FB
CURRENT
ADJUST
V
LIMIT
SENSE
LINE
+
-
V
1 V
BG
V
OVP
C
+ V
V I (LIMIT)
ON/OFF
DC
5.8 V
T
K
K
OV/
MAX
UV
PS(UPPER)
PS(LOWER)
STOP LOGIC
MAX
5.8 V
4.8 V
DC
66k/132k
COMPARATOR
SOFT START
I
I
I
INTERNAL UV
FB
PS(UPPER)
PS(LOWER)
reduction, output
MAX
+
-
F REDUCTION
F REDUCTION
STOP SOFT
OSCILLATOR
WITH JITTER
PWM
START
CLOCK
SOFT START
D
OFF
MAX
Figure 3.
SOURCE (S) Pin:
Output MOSFET source connection for high voltage power return.
Primary side control circuit common and reference point.
NO CONNECTION (NC) Pin:
Internally not connected, floating potential pin.
E Package (eSIP-7C)
AUTO-RESTART
SHUTDOWN/
HYSTERETIC
SHUTDOWN
THERMAL
V
1
÷ 16
2
X
Pin Configuration (Top View).
C
3
0
1
4
F
S
5
S
R
INTERNAL
SUPPLY
D
7
Q
Exposed Pad
(Hidden)
Internally
Connected to
SOURCE Pin
CURRENT LIMIT
K
K
COMPARATOR
CONTROLLED
GATE DRIVER
PS(LOWER)
PS(UPPER)
TURN-ON
TOP264-271
S 12
S 10
S 11
S 9
S 8
S 7
V Package (eDIP-12)
PI-4511-012810
BLANKING
+
+
+
SOURCE (S)
-
-
-
LEADING
EDGE
PI-5568-083109
SOURCE (S)
DRAIN (D)
Rev. B 03/10
1 V
2 X
3 C
4 F
5 NC
6 D
3