T0P243G
| Model | T0P243G |
| Description | Family Extended Power, Design Flexible,Integrated Off-line Switcher |
| PDF file | Total 48 pages (File size: 769K) |
| Chip Manufacturer | POWERINT |
TOP242-249
Function
Remote ON/OFF
TOPSwitch-II
N/A*
TOPSwitch-GX
Figures
TOPSwitch-GX
Advantages
Single transistor
or optocoupler
interface or manual
switch
11, 22,
23, 24,
25, 26,
27, 29,
36, 37,
38, 39,
40
•
•
•
•
•
•
•
Fast on/off (cycle by cycle)
Active-on or active-off control
Low consumption in remote off state
Active-on control for fail-safe
Eliminates expensive in-line on/off
switch
Allows processor controlled turn
on/off
Permits shutdown/wake-up of
peripherals via LAN or parallel port
Synchronization to external lower
frequency signal
Starts new switching cycle on
demand
Synchronization
N/A*
Single transistor
or optocoupler
interface
Hysteretic 130
°C
min. Shutdown (with
75
°C
hysteresis)
•
•
Thermal Shutdown
125
°C
min.
Latched
Current Limit Tolerance
±10%
(@25
°C)
±7%
(@25
°C)
-8% (0
°C
to100
°C)
-4% (0
°C
to 100
°C)
DRAIN
DIP
Creepage
SMD
at Package
TO-220
DRAIN Creepage at
PCB for Y and R
Packages
0.037" / 0.94 mm
0.037" / 0.94 mm
0.046" / 1.17 mm
0.045" / 1.14 mm
(R Package N/A*)
0.137" / 3.48 mm
0.137" / 3.48 mm
0.068" / 1.73 mm
0.113" / 2.87 mm
(preformed leads)
• Automatic recovery from thermal
fault
• Large hysteresis prevents circuit
board overheating
• 10% higher power capability due to
tighter tolerance
• Greater immunity to arcing as a
result of build-up of dust, debris and
other contaminants
• Preformed leads accommodate
large creepage for PCB layout
• Easier to meet Safety (UL/VDE)
Table 4 (cont). Comparison Between TOPSwitch-II and TOPSwitch-GX.
*Not available
TOPSwitch-FX
vs.
TOPSwitch-GX
Table 5 compares the features and performance differences
between
TOPSwitch-GX
and
TOPSwitch-FX.
Many of the new
features eliminate the need for additional discrete components.
Function
Light Load Operation
Other features increase the robustness of design allowing cost
savings in the transformer and other power components.
TOPSwitch-FX
Cycle skipping
TOPSwitch-GX
Frequency and Duty Cycle
reduction
Line sensing and externally
set current limit possible
simultaneously
(functions split onto
L and X pins)
100-30%
TOPSwitch-GX
Advantages
• Improves light load efficiency
• Reduces no-load consumption
• Additional design flexibility allows all
features to be used simultaneously
Line Sensing/Externally Line sensing and
Set Current Limit
externally set
(Y and R Packages)
current limit
mutually
exclusive (M pin)
Current Limit
100-40%
Programming
Range
• Minimizes transformer core size
in highly continuous designs
Table 5. Comparison Between TOPSwitch-FX and TOPSwitch-GX.
(continued on next page)
28
E
7/01
August 8, 2000
