Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF HTML

TOP254PN Datasheet(PDF) 25 Page - Power Integrations, Inc.

Part No. TOP254PN
Description  Enhanced EcoSmart®, Integrated Off-Line Switcher with Advanced Feature Set and Extended Power Range
Download  48 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  POWERINT [Power Integrations, Inc.]
Homepage  http://www.powerint.com
Logo 

TOP254PN Datasheet(HTML) 25 Page - Power Integrations, Inc.

Zoom Inzoom in Zoom Outzoom out
 25 / 48 page
background image
Rev. F 01/09
25
TOP252-262
www.powerint.com
Key Application Considerations
TOPSwitch-HX vs. TOPSwitch-GX
Table 4 compares the features and performance differences
between TOPSwitch-HX and TOPSwitch-GX. Many of the new
features eliminate the need for additional discrete components.
Other features increase the robustness of design, allowing cost
savings in the transformer and other power components.
TOPSwitch-HX vs. TOPSwitch-GX
Function
TOPSwitch-GX
TOPSwitch-HX
TOPSwitch-HX Advantages
EcoSmart
Linear frequency reduction to
30 kHz (@ 132 kHz) for
duty cycles < 10%
Multi-mode operation with
linear frequency reduction to
30 kHz (@ 132 kHz) and
multi-cycle modulation
(virtually no audible noise)
Improved efficiency over load (e.g. at 25% load
point)
Improved standby efficiency
Improved no-load consumption
Output Overvoltage
Protection (OVP)
Not available
User programmable primary
or secondary hysteretic or
latching OVP
Protects power supply output during open loop fault
Maximum design flexibility
Line Feed-Forward with Duty
Cycle Reduction
Linear reduction
Dual slope reduction with
lower, more accurate onset
point
Improved line ripple rejection
Smaller DC bus capacitor
Switching Frequency DIP-8
Package
132 kHz
66 kHz
Increased output power for given MOSFET size due
to higher efficiency
Lowest MOSFET On
Resistance in DIP-8 Package
3.0
Ω (TOP246P)
1.8
Ω (TOP258P)
Increased output power in designs without external
heatsink
I2f Trimming
Not available
-10% / +20%
Increased output power for given core size
Reduced over-load power
Auto-restart Duty Cycle
5.6%
2%
Reduced delivered average output power during
open loop faults
Frequency Jitter
±4 kHz @ 132 kHz
±2 kHz @ 66 kHz
±5 kHz @ 132 kHz
±2.5 kHz @ 66 kHz
Reduced EMI filter cost
Thermal Shutdown
130 °C to 150 °C
135 °C to 150 °C
Increased design margin
External Current Limit
30%-100% of I
LIMIT
30%-100% of I
LIMIT, additional
trim at 0.7 × I
LIMIT
Reduced tolerances when current limit is set
externally
Line UV Detection Threshold
50
μA (2 MΩ sense
impedance)
25
μA (4 MΩ sense
impedance)
Reduced dissipation for lower no-load consumption
Soft-Start
10 ms duty cycle and current
limit ramp
17 ms sweep through multi-
mode characteristic
Reduced peak current and voltage component
stress at startup
Smooth output voltage rise
Table 4.
Comparison Between TOPSwitch-GX and TOPSwitch-HX.


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 


Datasheet Download




Link URL




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

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   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