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

X  

UC1845A-SP bảng dữ liệu(PDF) 9 Page - Texas Instruments

Click here to check the latest version.
tên linh kiện UC1845A-SP
Giải thích chi tiết về linh kiện  QML Class V, Radiation Hardened Current-Mode PWM Controller
Download  28 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  TI1 [Texas Instruments]
Trang chủ  http://www.ti.com
Logo TI1 - Texas Instruments

UC1845A-SP bảng dữ liệu(HTML) 9 Page - Texas Instruments

Back Button UC1845A-SP Datasheet HTML 5Page - Texas Instruments UC1845A-SP Datasheet HTML 6Page - Texas Instruments UC1845A-SP Datasheet HTML 7Page - Texas Instruments UC1845A-SP Datasheet HTML 8Page - Texas Instruments UC1845A-SP Datasheet HTML 9Page - Texas Instruments UC1845A-SP Datasheet HTML 10Page - Texas Instruments UC1845A-SP Datasheet HTML 11Page - Texas Instruments UC1845A-SP Datasheet HTML 12Page - Texas Instruments UC1845A-SP Datasheet HTML 13Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 28 page
background image
UC1845A-SP
www.ti.com
SLUSC14 – MAY 2015
Feature Description (continued)
Figure 3. Inductor Looks Like a Current Source to Small Signals
A. Direct duty cycle control
B. Current mode control
Figure 4. Required Error Amplifier Compensation for Continuous Inductor Current Designs
9.3.1 UVLO
The UVLO circuit ensures that VCC is adequate to make the UC1845A fully operational before enabling the
output stage. Figure 5 shows that the UVLO turn-on and turn-off thresholds are fixed internally at 8.5 V and 7.9
V, respectively. The 0.6-V hysteresis prevents VCC oscillations during power sequencing. Figure 6 shows supply
current requirements. Start-up current is <1 mA for efficient bootstrapping from the rectified input of an off-line
converter, as shown in Figure 7. During normal circuit operation, VCC is developed from auxiliary winding, WAux,
with D1 and CIN. However, at start-up, CIN must be charged to 16 V through RIN. With a start-up current of 1 mA,
RIN can be as large as 100 kΩ and still charge CIN when VAc = 90-V RMS (low line). Power dissipation in RIN
would then be less than 350 mW even under high line (VAc = 130-V RMS) conditions.
During UVLO, the output driver is in a low state. While it does not exhibit the same saturation characteristics as
normal operation, it can easily sink 1 mA, enough to ensure the MOSFET is held off.
Copyright © 2015, Texas Instruments Incorporated
Submit Documentation Feedback
9
Product Folder Links: UC1845A-SP


Số phần tương tự - UC1845A-SP

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Texas Instruments
UC1845A-SP TI-UC1845A-SP_15 Datasheet
874Kb / 28P
[Old version datasheet]   UC1845A-SP QML Class V, Radiation Hardened Current-Mode PWM Controller
More results

Mô tả tương tự - UC1845A-SP

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Texas Instruments
UC1843B-SP TI1-UC1843B-SP Datasheet
3Mb / 27P
[Old version datasheet]   QML Class V, Radiation Hardened Current-Mode PWM Controller
UC1843B-SP TI-UC1843B-SP_V02 Datasheet
3Mb / 31P
[Old version datasheet]   UC1843B-SP QML Class V, Radiation Hardened Current-Mode PWM Controller
UC1845A-SP TI-UC1845A-SP_15 Datasheet
874Kb / 28P
[Old version datasheet]   UC1845A-SP QML Class V, Radiation Hardened Current-Mode PWM Controller
UC1843B-SP TI-UC1843B-SP_V01 Datasheet
3Mb / 27P
[Old version datasheet]   UC1843B-SP QML Class V, Radiation Hardened Current-Mode PWM Controller
UC1842A-SP TI1-UC1842A-SP_15 Datasheet
964Kb / 30P
[Old version datasheet]   QML Class V, Current-Mode PWM Controller
UC1842A-SP TI1-UC1842A-SP_16 Datasheet
998Kb / 31P
[Old version datasheet]   QML Class V, Current-Mode PWM Controller
UC1843-SP TI-UC1843-SP_15 Datasheet
283Kb / 13P
[Old version datasheet]   QML CLASS V, CURRENT-MODE PWM CONTROLLER
UC1846-SP TI1-UC1846-SP_16 Datasheet
644Kb / 29P
[Old version datasheet]   Class-V, Radiation Hardened PWM Controller
UC1842A-SP TI1-UC1842A-SP Datasheet
650Kb / 15P
[Old version datasheet]   QML CLASS V, CURRENT-MODE PWM CONTROLLERS
UC1825A-SP TI1-UC1825A-SP_16 Datasheet
831Kb / 40P
[Old version datasheet]   Class-V, Radiation Hardened High-Speed PWM Controller
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


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
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   |   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