Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

UC3842BDG Datasheet(PDF) 13 Page - ON Semiconductor

Part No. UC3842BDG
Description  High Performance Current Mode Controllers
Download  22 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

UC3842BDG Datasheet(HTML) 13 Page - ON Semiconductor

Back Button UC3842BDG Datasheet HTML 9Page - ON Semiconductor UC3842BDG Datasheet HTML 10Page - ON Semiconductor UC3842BDG Datasheet HTML 11Page - ON Semiconductor UC3842BDG Datasheet HTML 12Page - ON Semiconductor UC3842BDG Datasheet HTML 13Page - ON Semiconductor UC3842BDG Datasheet HTML 14Page - ON Semiconductor UC3842BDG Datasheet HTML 15Page - ON Semiconductor UC3842BDG Datasheet HTML 16Page - ON Semiconductor UC3842BDG Datasheet HTML 17Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 13 / 22 page
background image
UC3842B, UC3843B, UC2842B, UC2843B
http://onsemi.com
13
+
-
+
-
S
R
+
R
R
R
2R
VClamp [
1.67
R2
R1
) 1
Ipk(max) [
VClamp
RS
5.0V Ref
Q
Bias
Osc
EA
1.0V
5(9)
7(11)
6(10)
5(8)
3(5)
RS
Q1
VCC
Vin
1(1)
2(3)
4(7)
8(14)
R1
VClamp
R2
Where: 0
≤ VClamp ≤ 1.0 V
C
MPSA63
tSoftStart +* In 1 *
VC
3 VClamp
C
R1 R2
R1 ) R2
7(12)
1.0 mA
Comp/Latch
5.0V Ref
+
-
S
R
Q
Bias
+
1.0mA
Osc
R
R
R
2R
EA
1.0V
5(9)
1(1)
2(3)
4(7)
8(14)
C
1.0M
tSoft-Start ≈ 3600C in mF
Figure 25. Soft−Start Circuit
Figure 26. Adjustable Buffered Reduction of
Clamp Level with Soft−Start
+
-
5.0V Ref
+
-
S
R
Q
(11)
(10)
(8)
Comp/Latch
(5)
RS
1/4 W
VCC
Vin
K
M
D
SENSEFET
G
S
Power Ground:
To Input Source
Return
Control Circuitry Ground:
To Pin (9)
Virtually lossless current sensing can be achieved with the implementation of a
SENSEFET power switch. For proper operation during over-current conditions, a
reduction of the Ipk(max) clamp level must be implemented. Refer to Figures 24 and 26.
VPin 5 [
RS Ipk rDS(on)
rDM(on) ) RS
If: SENSEFET = MTP10N10M
RS = 200
Then : VPin5 [ 0.075 Ipk
(12)
Figure 27. Current Sensing Power MOSFET
+
-
5.0V Ref
+
-
S
R
Q
7(11)
6(10)
5(8)
3(5)
RS
Q1
VCC
Vin
C
R
The addition of the RC filter will eliminate instability caused by the leading
edge spike on the current waveform.
7(12)
Comp/Latch
Figure 28. Current Waveform Spike Suppression


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22 


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