Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

TOP242R Datasheet(PDF) 8 Page - Power Integrations, Inc.

Part # TOP242R
Description  TOPSwitch -GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
Download  52 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  POWERINT [Power Integrations, Inc.]
Direct Link  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

TOP242R Datasheet(HTML) 8 Page - Power Integrations, Inc.

Back Button TOP242R Datasheet HTML 4Page - Power Integrations, Inc. TOP242R Datasheet HTML 5Page - Power Integrations, Inc. TOP242R Datasheet HTML 6Page - Power Integrations, Inc. TOP242R Datasheet HTML 7Page - Power Integrations, Inc. TOP242R Datasheet HTML 8Page - Power Integrations, Inc. TOP242R Datasheet HTML 9Page - Power Integrations, Inc. TOP242R Datasheet HTML 10Page - Power Integrations, Inc. TOP242R Datasheet HTML 11Page - Power Integrations, Inc. TOP242R Datasheet HTML 12Page - Power Integrations, Inc. Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 52 page
background image
TOP242-250
8
G
1/02
Figure 10. Synchronization Timing Diagram.
PI-2637-060600
Oscillator
(SAW)
DMAX
Enable from
X, L or M Pin (STOP)
Time
CURRENT LIMIT (X) pin (Y, R or F package) or MULTI-
FUNCTION (M) pin (P or G package) and the rectified DC
high voltage bus, the current limit is reduced with increasing
line voltage, allowing a true power limiting operation against
line variation to be implemented. When using an RCD clamp,
this power limiting technique reduces maximum clamp
voltage at high line. This allows for higher reflected voltage
designs as well as reducing clamp dissipation.
The leading edge blanking circuit inhibits the current limit
comparator for a short time after the output MOSFET is turned
on. The leading edge blanking time has been set so that, if a
power supply is designed properly, current spikes caused by
primary-side capacitances and secondary-side rectifier reverse
recovery time should not cause premature termination of the
switching pulse.
The current limit is lower for a short period after the leading
edge blanking time as shown in Figure 52. This is due to
dynamic characteristics of the MOSFET. To avoid triggering
the current limit in normal operation, the drain current wave-
form should stay within the envelope shown.
Line Under-Voltage Detection (UV)
At power up, UV keeps TOPSwitch-GX off until the input line
voltage reaches the under voltage threshold. At power down,
UV prevents auto-restart attempts after the output goes out of
regulation. This eliminates power down glitches caused by
the slow discharge of large input storage capacitor present in
applications such as standby supplies. A single resistor
connected from the LINE-SENSE pin (Y, R or F package) or
MULTI-FUNCTION pin (P or G package) to the rectified DC
high voltage bus sets UV threshold during power up. Once the
power supply is successfully turned on, the UV threshold is
lowered to 40% of the initial UV threshold to allow extended
input voltage operating range (UV low threshold). If the UV
low threshold is reached during operation without the power
supply losing regulation the device will turn off and stay off
until UV (high threshold) has been reached again. If the power
supply loses regulation before reaching the UV low threshold,
the device will enter auto-restart. At the end of each auto-
restart cycle (S7), the UV comparator is enabled. If the UV high
threshold is not exceeded the MOSFET will be disabled during
the next cycle (see Figure 8). The UV feature can be disabled
independent of OV feature as shown in Figures 19 and 23.
Line Overvoltage Shutdown (OV)
The same resistor used for UV also sets an overvoltage thresh-
old which, once exceeded, will force TOPSwitch-GX output
into off-state. The ratio of OV and UV thresholds is preset at
4.5 as can be seen in Figure 11. When the MOSFET is off, the
rectified DC high voltage surge capability is increased to the
voltage rating of the MOSFET (700 V), due to the absence of
the reflected voltage and leakage spikes on the drain. A small
amount of hysteresis is provided on the OV threshold to
prevent noise triggering. The OV feature can be disabled
independent of the UV feature as shown in Figures 18 and 32.
Line Feed Forward with DC
MAX Reduction
The same resistor used for UV and OV also implements line
voltage feed forward which minimizes output line ripple and
reduces power supply output sensitivity to line transients. This
feed forward operation is illustrated in Figure 7 by the
different values of I
L (Y, R or F package) or IM (P or G Pack-
age). Note that for the same CONTROL pin current, higher
line voltage results in smaller operating duty cycle. As an added
feature, the maximum duty cycle DC
MAX is also reduced from
78% (typical) at a voltage slightly higher than the UV thresh-
old to 38% (typical) at the OV threshold (see Figures 7 and
11). Limiting DC
MAX at higher line voltages helps prevent trans-


Similar Part No. - TOP242R

ManufacturerPart #DatasheetDescription
logo
Power Integrations, Inc...
TOP242R POWERINT-TOP242R Datasheet
771Kb / 48P
   Family Extended Power, Design Flexible,Integrated Off-line Switcher
TOP242R POWERINT-TOP242R Datasheet
2Mb / 52P
   TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
TOP242R POWERINT-TOP242R Datasheet
2Mb / 52P
   Extended Power, Design Flexible EcoSmart, Integrated Off-line Switcher
TOP242R POWERINT-TOP242R Datasheet
3Mb / 54P
   Extended Power, Design Flexible, EcoSmart, Integrated Off-Line Switcher
October 2020
TOP242R- POWERINT-TOP242R- Datasheet
2Mb / 52P
   TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
More results

Similar Description - TOP242R

ManufacturerPart #DatasheetDescription
logo
Guangdong Kexin Industr...
TOP250 KEXIN-TOP250 Datasheet
298Kb / 6P
   TOPSwitch -GX Family Extended Power, Design Flexible, EcoSmart,Integrated Off-line Switcher
logo
Power Integrations, Inc...
TOP242-250 POWERINT-TOP242-250 Datasheet
2Mb / 52P
   TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher
TOP242 POWERINT-TOP242_V01 Datasheet
3Mb / 54P
   Extended Power, Design Flexible, EcoSmart, Integrated Off-Line Switcher
October 2020
TOP242 POWERINT-TOP242 Datasheet
2Mb / 52P
   Extended Power, Design Flexible EcoSmart, Integrated Off-line Switcher
TOP242-249 POWERINT-TOP242-249 Datasheet
771Kb / 48P
   Family Extended Power, Design Flexible,Integrated Off-line Switcher
TOP232 POWERINT-TOP232 Datasheet
3Mb / 38P
   Design Flexible, EcoSmart, Integrated Off-Line Switcher
October 2020
TOP232PN POWERINT-TOP232PN Datasheet
644Kb / 36P
   Design Flexible, EcoSmart, Integrated Off-line Switcher
TOP234PN POWERINT-TOP234PN Datasheet
644Kb / 36P
   Design Flexible, EcoSmart, Integrated Off-line Switcher
logo
Power Analog Micoelectr...
TOP232PN PAM-TOP232PN Datasheet
644Kb / 36P
   TOPSwitch-FX Family Design Flexible, EcoSmart짰, Integrated Off-line Switcher
logo
Power Integrations, Inc...
TOP234G-TL POWERINT-TOP234G-TL Datasheet
644Kb / 36P
   Design Flexible, EcoSmart® , Integrated Off-line Switcher
July 2001
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com