Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

UPS602 Datasheet(PDF) 6 Page - Unisonic Technologies

Part No. UPS602
Description  HIGH PERFORMANCE CURRENT MODE POWER SWITCH
Download  12 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UPS602 Datasheet(HTML) 6 Page - Unisonic Technologies

Back Button UPS602 Datasheet HTML 2Page - Unisonic Technologies UPS602 Datasheet HTML 3Page - Unisonic Technologies UPS602 Datasheet HTML 4Page - Unisonic Technologies UPS602 Datasheet HTML 5Page - Unisonic Technologies UPS602 Datasheet HTML 6Page - Unisonic Technologies UPS602 Datasheet HTML 7Page - Unisonic Technologies UPS602 Datasheet HTML 8Page - Unisonic Technologies UPS602 Datasheet HTML 9Page - Unisonic Technologies UPS602 Datasheet HTML 10Page - Unisonic Technologies Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 12 page
background image
UPS602
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
6 of 12
www.unisonic.com.tw
QW-R119-005,A
FUNCTIONAL DESCRIPTION
The internal reference voltages and bias circuit work at VCC>12.6V, and shutdown at VCC< 8.1V.
(1) Soft-Start
When every IC power on, driver output duty cycle will be decided by voltage VSS on soft-start capacitor and VCS on
current sense resistor at beginning. After VSS reach 5.1V, the whole soft-start phase end, and driver duty cycle
depend on VFB and VCS. The relation among VSS, VFB and VOUT as followed FIG.3, here soft-start phase Tsoft-start
should more than VOUT start-up phase Tstart-up, otherwise, IC will enter false OLP protection state. Because after the
soft-start phase end, if VOUT remain in lower voltage, VFB more than 4.6V, then IC enter false OLP state.
Furthermore, soft-start phase should end before VCC reach VCC(MIN) during VCC power on. Otherwise, if soft-start
phase remain not end before VCC reach VCC(MIN) during VCC power on, IC will enter auto-restart phase and not set up
VOUT.
Finally soft-start also set OVP active phase. OVP active phase between VSS=0 and VSS=3.8V, OVP will not be
sensed after VSS reach 3.8V.The Soft-start phase TSS
6 ms
(CSS=0.05uF)
TSS =
12 ms
(CSS=0.1uF)
120 ms
(CSS=1uF)
t
VOUT
VFB
t
t
Driver
4.6V
TSTRAT-UP
VSS
t
5.1V
TSOFT-START
FIG.3 Soft-start phase


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12 


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