전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

Preview PDF HTML

LM5032MTC/NOPB 데이터시트(PDF) 19 Page - Texas Instruments

Click here to check the latest version.
부품명 LM5032MTC/NOPB
상세설명  High-Voltage Dual Interleaved Current Mode Controller
PDF  34 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI - Texas Instruments

LM5032MTC/NOPB 데이터시트(HTML) 19 Page - Texas Instruments

Back Button LM5032MTC/NOPB Datasheet HTML 15Page - Texas Instruments LM5032MTC/NOPB Datasheet HTML 16Page - Texas Instruments LM5032MTC/NOPB Datasheet HTML 17Page - Texas Instruments LM5032MTC/NOPB Datasheet HTML 18Page - Texas Instruments LM5032MTC/NOPB Datasheet HTML 19Page - Texas Instruments LM5032MTC/NOPB Datasheet HTML 20Page - Texas Instruments LM5032MTC/NOPB Datasheet HTML 21Page - Texas Instruments LM5032MTC/NOPB Datasheet HTML 22Page - Texas Instruments LM5032MTC/NOPB Datasheet HTML 23Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 19 / 34 page
background image
UVLO
LM5032
1.25V
20 2A
Max. Duty
Cycle Limiter
R1
R2
VPWR
Shutdown
Control
UVLO
LM5032
1.25V
20 2A
Max. Duty
Cycle Limiter
R1
R2
VPWR
Enable VCC Regulator
and Output Drivers
R2 =
1.25 x R1
VPWR - 1.25
VCC
8V - 15V
LM5032
C1
VIN
8V-15V
Start-up
Voltage
LM5032
www.ti.com
SNVS344B – MARCH 2005 – REVISED DECEMBER 2014
Application Information (continued)
Figure 21. Bypassing the Internal Start-up Regulator
8.1.3 UVLO
The under-voltage lockout threshold (UVLO) is internally set at 1.25V at the UVLO pin. With two external
resistors as shown in Figure 22, the LM5032 is enabled when VPWR exceeds the programmed threshold voltage.
When VPWR is above the threshold, the internal 20 µA current source is enabled to raise the voltage at the UVLO
pin, providing hysteresis. R1 and R2 are determined from the following equations:
R1 = VHYS/20 µA
(3)
(4)
where VHYS is the desired UVLO hysteresis at VPWR, and VPWR in the second equation is the turn-on voltage. For
example, if the LM5032 is to be enabled when VPWR reaches 20V, and disabled when VPWR is decreased to 17V,
R1 calculates to 150 k
Ω, and R2 calculates to 10 kΩ. The voltage at UVLO should not exceed 6V at any time.
Figure 22. UVLO Circuit
The LM5032 can be remotely shutdown by taking the UVLO pin below 1.25V with an external open collector or
open drain device, as shown in Figure 23. The outputs, and the VCC regulator, are disabled, and the LM5032
enters a low power mode. To shut down one regulator without affecting the other, see the Soft-start section.
Figure 23. Shutdown Control
Copyright © 2005–2014, Texas Instruments Incorporated
Submit Documentation Feedback
19
Product Folder Links: LM5032



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


데이터시트 다운로드

Go To PDF Page


링크 URL



ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크 투 데이터시트    |   링크교환   |   제조사별 검색
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