công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

Preview PDF HTML

PM8803TR bảng dữ liệu(PDF) 25 Page - STMicroelectronics

tên linh kiện PM8803TR
Giải thích chi tiết về linh kiện  High-efficiency, IEEE 802.3at compliant integrated PoE-PD interface and PWM controller
PDF  34 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM8803TR bảng dữ liệu(HTML) 25 Page - STMicroelectronics

Back Button PM8803TR Datasheet HTML 21Page - STMicroelectronics PM8803TR Datasheet HTML 22Page - STMicroelectronics PM8803TR Datasheet HTML 23Page - STMicroelectronics PM8803TR Datasheet HTML 24Page - STMicroelectronics PM8803TR Datasheet HTML 25Page - STMicroelectronics PM8803TR Datasheet HTML 26Page - STMicroelectronics PM8803TR Datasheet HTML 27Page - STMicroelectronics PM8803TR Datasheet HTML 28Page - STMicroelectronics PM8803TR 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


bảng dữ liệu tải về

Go To PDF Page


Link URL



Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Liên kết đến bảng dữ liệu    |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
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