Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

UC3848G-S08-R Datasheet(PDF) 6 Page - Unisonic Technologies

Part No. UC3848G-S08-R
Description  HIGH PERFORMANCE CURRENT MODE CONTROLLERS
Download  11 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UC3848G-S08-R Datasheet(HTML) 6 Page - Unisonic Technologies

Back Button UC3848G-S08-R Datasheet HTML 2Page - Unisonic Technologies UC3848G-S08-R Datasheet HTML 3Page - Unisonic Technologies UC3848G-S08-R Datasheet HTML 4Page - Unisonic Technologies UC3848G-S08-R Datasheet HTML 5Page - Unisonic Technologies UC3848G-S08-R Datasheet HTML 6Page - Unisonic Technologies UC3848G-S08-R Datasheet HTML 7Page - Unisonic Technologies UC3848G-S08-R Datasheet HTML 8Page - Unisonic Technologies UC3848G-S08-R Datasheet HTML 9Page - Unisonic Technologies UC3848G-S08-R Datasheet HTML 10Page - Unisonic Technologies Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 11 page
background image
UC3848
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
6 of 11
www.unisonic.com.tw
QW-R103-033.F
FUNCTIONAL DESCRIPTION(Cont.)
(2) Switch Frequency Set
The maximum switch frequency is set to 68kHz. Switch frequency is modulated by output power POUT during IC
operating. At no load or light load condition, most of the power dissipation in a switching mode power supply is from
switching loss on the MOSFET transistor, the core loss of the transformer and the loss on the subber circuit. The
magnitude of power loss is in proportion to the number of switching events within a fixed period of time. So lower
switch frequency at lower load, which more and more improve IC’s efficiency at light load. At from no load to light
load condition, The IC will operate at from Burst mode to Reducing Frequency Mode. The relation curve between fSW
and POUT/POUT (MAX) as followed FIG.4.
FIG.4 The relation curve between fSW and relative output power POUT/ POUT (MAX)
(3) Internal Synchronized Slope Compensation
Built-in slope compensation circuit adds voltage ramp onto the current sense input voltage for PWM
generation, this greatly improves the close loop stability at CCM and prevents the sub-harmonic oscillation and thus
reduces the output ripple voltage.


Html Pages

1  2  3  4  5  6  7  8  9  10  11 


Datasheet Download

Go To PDF Page


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