Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

UC1842A-SP Datasheet(PDF) 9 Page - Texas Instruments

No. de pieza UC1842A-SP
Descripción Electrónicos  QML Class V, Current-Mode PWM Controller
Download  31 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

UC1842A-SP Datasheet(HTML) 9 Page - Texas Instruments

Back Button UC1842A-SP_16 Datasheet HTML 5Page - Texas Instruments UC1842A-SP_16 Datasheet HTML 6Page - Texas Instruments UC1842A-SP_16 Datasheet HTML 7Page - Texas Instruments UC1842A-SP_16 Datasheet HTML 8Page - Texas Instruments UC1842A-SP_16 Datasheet HTML 9Page - Texas Instruments UC1842A-SP_16 Datasheet HTML 10Page - Texas Instruments UC1842A-SP_16 Datasheet HTML 11Page - Texas Instruments UC1842A-SP_16 Datasheet HTML 12Page - Texas Instruments UC1842A-SP_16 Datasheet HTML 13Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 31 page
background image
7
5
4
2
1
3
8
7
6
5
V
CC
Gnd
R
T/CT
V
FB
Comp
C/S
V
REF
5.0 V
50 mA
V
C
Output
Pwr
Ground
PWM
Latch
5-V
REF
S/R
UVLO
34 V
2.5 V
Osc
Error
Amplifier
2R
R
1 V
Current
Sense
Comparator
Internal
Bias
V
Good
Logic
REF
S
R
UC1842A-SP, UC1843A-SP, UC1844A-SP
www.ti.com
SLUS872D – JANUARY 2009 – REVISED MAY 2015
9 Detailed Description
9.1 Overview
The UC184xA-SP control IC is a pin-for-pin compatible improved version of the UC184x family. Providing the
necessary features to control current-mode switched-mode power supplies, this device has the following
improved features. Startup current is specified to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA.
During UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
9.2 Functional Block Diagram
9.3 Feature Description
UC184xA is a current mode controller, used to support various topologies such as forward, flyback, Buck, Boost
and using an external interface circuit will also support half-bridge, full bridge, and push-pull configurations.
Figure 2 shows the two-loop current-mode control system in a typical buck regulator application. A clock signal
initiates power pulses at a fixed frequency. The termination of each pulse occurs when an analog of the inductor
current reaches a threshold established by the error signal. In this way, the error signal actually controls peak
inductor current. This contrasts with conventional schemes in which the error signal directly controls pulse width
without regard to inductor current.
Several performance advantages result from the use of current-mode control. First, an input voltage feed-forward
characteristic is achieved; that is, the control circuit instantaneously corrects for input voltage variations without
using up any of the error amplifier’s dynamic range. Therefore, line regulation is excellent and the error amplifier
can be dedicated to correcting for load variations exclusively.
Copyright © 2009–2015, Texas Instruments Incorporated
Submit Documentation Feedback
9
Product Folder Links: UC1842A-SP UC1843A-SP UC1844A-SP


Número de pieza similar - UC1842A-SP_16

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Texas Instruments
UC1842A-SP TI1-UC1842A-SP_15 Datasheet
964Kb / 30P
[Old version datasheet]   QML Class V, Current-Mode PWM Controller
More results

Descripción similar - UC1842A-SP_16

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Texas Instruments
UC1842A-SP TI1-UC1842A-SP_15 Datasheet
964Kb / 30P
[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
UC1843B-SP TI1-UC1843B-SP Datasheet
3Mb / 27P
[Old version datasheet]   QML Class V, Radiation Hardened Current-Mode PWM Controller
UC1845A-SP TI1-UC1845A-SP Datasheet
938Kb / 28P
[Old version datasheet]   QML Class V, Radiation Hardened Current-Mode PWM Controller
UC1842A-SP TI1-UC1842A-SP Datasheet
650Kb / 15P
[Old version datasheet]   QML CLASS V, CURRENT-MODE PWM CONTROLLERS
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
UC1846-SP TI1-UC1846-SP Datasheet
631Kb / 15P
[Old version datasheet]   RAD-TOLERANT CLASS-V, CURRENT-MODE PWM CONTROLLER
SE555-SP TI1-SE555-SP Datasheet
355Kb / 18P
[Old version datasheet]   QML CLASS V PRECISION TIMER
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


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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