Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

Preview PDF HTML

PM8803 Scheda tecnica(PDF) 25 Page - STMicroelectronics

Il numero della parte PM8803
Spiegazioni elettronici  High-efficiency, IEEE 802.3at compliant integrated PoE-PD interface and PWM controller
PDF  34 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM8803 Scheda tecnica(HTML) 25 Page - STMicroelectronics

Back Button PM8803 Datasheet HTML 21Page - STMicroelectronics PM8803 Datasheet HTML 22Page - STMicroelectronics PM8803 Datasheet HTML 23Page - STMicroelectronics PM8803 Datasheet HTML 24Page - STMicroelectronics PM8803 Datasheet HTML 25Page - STMicroelectronics PM8803 Datasheet HTML 26Page - STMicroelectronics PM8803 Datasheet HTML 27Page - STMicroelectronics PM8803 Datasheet HTML 28Page - STMicroelectronics PM8803 Datasheet HTML 29Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 25 / 34 page
background image
PM8803
PWM controller
Doc ID 018559 Rev 2
25/34
5
PWM controller
5.1
Oscillator
The internal oscillator frequency can be programmed by connecting an external resistor RT
between the FRS and ARTN pins. The relationship between the oscillator frequency FOSC
and the RT resistor is:
The PWM switching frequency is equal to the programmed oscillator frequency.
The useful range for RT is between 20 k to 200 kOhm
Figure 11.
PWM frequency vs. RT
5.2
Delay time control
The delay between the rising edge of GAT2 and GAT1 waveforms can be set by putting a
programming resistor RDT between DT and AGND or VB. The relationship between the
delay time and the RDT resistor is:
F
osc kHz
()
25000
3k
Ω R
+
T kΩ
()
-------------------------------------
=
0
100
200
300
400
500
600
700
800
900
1000
1100
0
20
40
60
80
100
120
140
160
180
200
220
240
FOSC [kHz]
RT [kOhm]
AM045101v1
t
del ns
()
1.6R
DT kOhm
()
=



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


Scheda tecnica Scarica

Go To PDF Page


Link URL



Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   Collegamento alla scheda tecnica    |   scambio Link   |   Ricerca produttore
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