Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

UC3844T Datasheet(PDF) 4 Page - STMicroelectronics

Part No. UC3844T
Description  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
Download  15 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UC3844T Datasheet(HTML) 4 Page - STMicroelectronics

  UC3844T Datasheet HTML 1Page - STMicroelectronics UC3844T Datasheet HTML 2Page - STMicroelectronics UC3844T Datasheet HTML 3Page - STMicroelectronics UC3844T Datasheet HTML 4Page - STMicroelectronics UC3844T Datasheet HTML 5Page - STMicroelectronics UC3844T Datasheet HTML 6Page - STMicroelectronics UC3844T Datasheet HTML 7Page - STMicroelectronics UC3844T Datasheet HTML 8Page - STMicroelectronics UC3844T Datasheet HTML 9Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 15 page
background image
Notes :
1. Max package power dissipation limits must be respected; low duty cycle pulse techniques are used during test maintain Tj as
close to Tamb as possible.
2. These parameters, although guaranteed, are not 100% tested in production.
3. Parameter measured at trip point of latch with VPIN2 = 0.
4. Gain defined as :
∆ VPIN1
A =
; 0
≤ VPIN3 ≤ 0.8 V
∆ VPIN3
5. Adjust Vi above the start threshold before setting at 15 V.
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Conditions
Value
Unit
Min.
Typ.
Max.
OUTPUT SECTION
VOL
Output Low Level
ISINK = 20mA
0.1
0.4
V
ISINK = 200mA
1.6
2.2
V
VOH
Output High Level
ISOURCE = 20mA
13
13.5
V
ISOURCE = 200mA
12
13.5
V
VOLS
UVLO Saturation
VCC = 6V; ISINK = 1mA
0.1
1.1
V
tr
Rise Time
Tj = 25
°C CL = 1nF (2)
50
150
ns
tf
Fall Time
Tj = 25
°C CL = 1nF (2)
50
150
ns
UNDER-VOLTAGE LOCKOUT SECTION
Start Threshold
UC3842T/4T
15
16
17
V
UC3843T/5T
7.8
8.4
9.0
V
Min Operating Voltage
After Turn-on
UC3842T/4T
9
10
11
V
UC3843T/5T
7.0
7.6
8.2
V
PWM SECTION
Maximum Duty Cycle
UC3842T/3T
94
96
100
%
UC3844T/5T
47
48
50
%
Minimum Duty Cycle
0%
TOTAL STANDBY CURRENT
Ist
Start-up Current
Vi = 6.5V for UC3843T/45T
0.3
0.5
mA
Vi = 14V for UC3842T/44T
0.3
0.5
mA
Ii
Operating Supply Current
VPIN2 = VPIN3 = 0V
12
17
mA
Viz
Zener Voltage
Ii = 25mA
30
36
V
UC3842T - UC3843T - UC3844T - UC3845T
4/15


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15 


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