Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

1N4004 Datenblatt(PDF) 9 Page - STMicroelectronics

Teilenummer 1N4004
Bauteilbeschribung  APPLICATION NOTE
Download  42 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

1N4004 Datenblatt(HTML) 9 Page - STMicroelectronics

Back Button 1N4004 Datasheet HTML 5Page - STMicroelectronics 1N4004 Datasheet HTML 6Page - STMicroelectronics 1N4004 Datasheet HTML 7Page - STMicroelectronics 1N4004 Datasheet HTML 8Page - STMicroelectronics 1N4004 Datasheet HTML 9Page - STMicroelectronics 1N4004 Datasheet HTML 10Page - STMicroelectronics 1N4004 Datasheet HTML 11Page - STMicroelectronics 1N4004 Datasheet HTML 12Page - STMicroelectronics 1N4004 Datasheet HTML 13Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 42 page
background image
9/42
AN1262 APPLICATION NOTE
Once this information has been found, it is possible to evaluate the power dissipation of the IC and check for
thermal limitations. Table 8 summarizes the relationships that can be used for this evaluation. In those formulae:
- Tc is the crossover time of the voltage and current waveforms at MOSFET's turn off;
- Cdrain is the total capacitance of the drain, composed of the Coss of the MOSFET, the parasitic capacitance of
the primary winding and, in case, some external capacitance.
As previously said, the worst-case operating conditions for the IC usually occur at Vin = VDCmin, however it is
worthwhile checking the losses also at maximum input voltage, that is at Vin = VPKmax, especially if an external
capacitor is added on the drain.
With the worst-case total losses in the IC it is possible to find the maximum junction-to-ambient thermal resis-
tance allowed for safe operation at maximum ambient temperature.
The operating temperature range of the devices extends to 150 °C, however designing for such high tempera-
ture is not recommended. A reasonable target can be to design for 125 °C maximum die temperature:
(3)
Table 8. IC's power losses estimate
With the aid of the diagrams shown in fig. 20 it is possible to estimate whether the required thermal resistance
is feasible or not and, in the positive case, how large the on-board copper area is supposed to be. Consider that
copper areas larger than 4 cm
2 do not give significant reduction of thermal resistance and may cause PCB lay-
outing to become a serious issue.
If the thermal check does not give positive results, a different heatsinking strategy may be considered, otherwise
a higher maximum duty cycle DX should be used, if possible, to reduce the RMS current. Also a higher Vinmin
Symbol
Description
Definition
IsRMS
Total RMS Secondary Current
IsAC
RMS Secondary Current (AC component only)
Symbol
Description
Definition
Pcond
Conduction losses
Psw
Switching losses
PCAP
Capacitive losses
PQ
Quiescent losses
PQ = VCC · Iop
Assume:
RDS(on) max = 28 Ω (@ Tj = 125 °C)
Tc = 50ns
fsw = 65kHz
Cdrain = 100pF
Iop = 7mA
Is
RMS
Is
pk
D'
3
-----
=
Is
AC
Is
RMS
2
Is
DC
2
=
R
thm ax
125
T
am b
P
Q
P
c ond
P
sw
P
ca p
++
+
-----------------------------------------------------------------
=
P
cond
Ip
RMS
2
R
DS o n
()max
=
P
sw
1
3
---
V
in
V
R
+
() Ip
pk
T
c
⋅⋅
f
sw
P
CA P
1
2
---
C
dr ain
V
in
V
R
+
()
2
⋅⋅
f
sw
Table 7. (continued)


Ähnliche Teilenummer - 1N4004

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Pan Jit International I...
1N4004 PANJIT-1N4004 Datasheet
96Kb / 2P
   PLASTIC SILICON RECTIFIERS
logo
Guangdong Juxing Electr...
1N4004 JUXING-1N4004 Datasheet
1Mb / 2P
   SILICON RECTIFIER
logo
Central Semiconductor C...
1N4004 CENTRAL-1N4004 Datasheet
72Kb / 2P
   AMP SILICON RECTIFIER
logo
Pan Jit International I...
1N4004 PANJIT-1N4004 Datasheet
53Kb / 2P
   PLASTIC SILICON RECTIFIER(VOLTAGE - 50 to 1000 Volts CURRENT - 1.0 Ampere)
logo
EIC discrete Semiconduc...
1N4004 EIC-1N4004 Datasheet
54Kb / 2P
   SILICON RECTIFIER DIODES
More results

Ähnliche Beschreibung - 1N4004

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Analog Devices
AN-236 AD-AN-236 Datasheet
164Kb / 3P
   APPLICATION NOTE
AN-686 AD-AN-686 Datasheet
55Kb / 2P
   APPLICATION NOTE
REV. 0
logo
Vectron International, ...
TFS211C VECTRON-TFS211C_03 Datasheet
40Kb / 2P
   Application Note
TFS199D VECTRON-TFS199D_08 Datasheet
25Kb / 1P
   Application Note
TFS380K VECTRON-TFS380K Datasheet
28Kb / 1P
   Application Note
TFS433K VECTRON-TFS433K_01 Datasheet
25Kb / 1P
   Application Note
logo
International Rectifier
AN-1070 IRF-AN-1070 Datasheet
241Kb / 14P
   Application Note
AN-1086 IRF-AN-1086 Datasheet
181Kb / 9P
   Application Note
logo
Vectron International, ...
TFS248E_0208 VECTRON-TFS248E_0208 Datasheet
13Kb / 1P
   Application Note
TFS321_0106 VECTRON-TFS321_0106 Datasheet
43Kb / 3P
   Application Note
logo
International Rectifier
AN-1204 IRF-AN-1204 Datasheet
916Kb / 11P
   Application Note
More results


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


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
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
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com