Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

TPS92002 Folha de dados(PDF) 6 Page - Texas Instruments

Click here to check the latest version.
Nome de Peças TPS92002
Descrição Electrónicos  GENERAL PURPOSE LED LIGHTING PWM CONTROLLER
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
Logo TI - Texas Instruments

TPS92002 Folha de dados(HTML) 6 Page - Texas Instruments

Back Button TPS92002 Datasheet HTML 2Page - Texas Instruments TPS92002 Datasheet HTML 3Page - Texas Instruments TPS92002 Datasheet HTML 4Page - Texas Instruments TPS92002 Datasheet HTML 5Page - Texas Instruments TPS92002 Datasheet HTML 6Page - Texas Instruments TPS92002 Datasheet HTML 7Page - Texas Instruments TPS92002 Datasheet HTML 8Page - Texas Instruments TPS92002 Datasheet HTML 9Page - Texas Instruments TPS92002 Datasheet HTML 10Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 14 page
background image
(
) (
)
(
)
-
=
´
+
´
+
1
OSC
CT
RTC
RTD
f
0.74
C
27pF
R
R
(
)
=
´
´
+
´
MAX
TC
T
OSC
D
0.74 R
C
27pF
f
+
+
S
Q
R
Q2
Q1
3
4
R
RTD
C
CT
R
RTC
V
REF
3.33 V
1.67 V
CLK
Oscillator
Oscillator
Latch
UDG-10005
RTC
RTD
TPS92001, TPS92002
SLUSA24 – FEBRUARY 2010
www.ti.com
APPLICATION INFORMATION
Introduction
The typical application diagrams in Figure 3 and Figure 4 show isolated and non-isolated flyback converters
utilizing the TPS92001. Note that the capacitors CREF and CVDD are local decoupling capacitors for the reference
and device input voltage, respectively. Both capacitors should be low ESR and ESL ceramic, placed as close as
possible to the device pins, and returned directly to the ground pin of the device for best stability. The REF pin
provides the internal bias to many of the device functions and CREF should be at least 0.47-µF to prevent the
REF voltage from drooping.
Current Sense (CS) Pin
In the TPS92001/2, the current regulation is obtained through the summation of the primary current sense and
any slope compensation at the CS pin compared to a 1-V threshold, as shown in the FUNCTIONAL BLOCK
DIAGRAM. Crossing this 1-V threshold resets the PWM latch and modulates the output driver on-time. In the
absence of a CS signal, the output obeys the programmed maximum on-time of the oscillator. When adding
slope compensation, it is important to use a small capacitor to AC couple the oscillator waveform before
summing this signal into the CS pin. By forcing the CS node to exceed the 1-V threshold the TPS92001/2 is
forced to zero percent duty cycle.
Oscillator
Equation 3 calculates the oscillator frequency setting.
(3)
(4)
Referring to Figure 1 and the waveforms in Figure 2, when Q1 is on, CCT charges via the on-resistance of the Q1
MOSFET and the RTC pin. During this charging process, the voltage of CCT is sensed through the RTD pin. The
S input of the oscillator latch, SOSC, is level sensitive, so crossing the upper threshold (set at 2/3 VREF or 3.33 V
for a typical 5.0 V reference) sets the Q output (CLK signal) of the oscillator latch high. A high CLK signal results
in turning off Q1 and turning on Q2. The timing capacitor then discharges through RTD and the RDS(on) of Q2.
CCT discharges from 3.33 V to the lower threshold (set at 1/3 REF or 1.67 V for a typical 5.0-V reference) sensed
through RTC. The R input to the oscillator latch, ROSC, is also level sensitive and resets the CLK signal low when
CCT crosses the 1.67-V threshold, turning off Q2 and turning on Q1, initiating another charging cycle.
Figure 1. Oscillator Function
6
Submit Documentation Feedback
Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS92001 TPS92002


Nº de peça semelhante - TPS92002

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Texas Instruments
TPS92010 TI-TPS92010 Datasheet
370Kb / 19P
[Old version datasheet]   8-PIN HIGH-EFFICIENCY, OFFLINE LED LIGHTING CONTROLLER
TPS92010D TI-TPS92010D Datasheet
370Kb / 19P
[Old version datasheet]   8-PIN HIGH-EFFICIENCY, OFFLINE LED LIGHTING CONTROLLER
TPS92010DR TI-TPS92010DR Datasheet
370Kb / 19P
[Old version datasheet]   8-PIN HIGH-EFFICIENCY, OFFLINE LED LIGHTING CONTROLLER
TPS92020 TI-TPS92020 Datasheet
553Kb / 22P
[Old version datasheet]   Resonant-Switching Driver Controller for LED Lighting
TPS92020D TI-TPS92020D Datasheet
553Kb / 22P
[Old version datasheet]   Resonant-Switching Driver Controller for LED Lighting
More results

Descrição semelhante - TPS92002

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Richtek Technology Corp...
RT8805C RICHTEK-RT8805C Datasheet
380Kb / 18P
   Two Phase General Purpose PWM Controller
RT8805 RICHTEK-RT8805 Datasheet
377Kb / 15P
   Two Phase General Purpose PWM Controller
logo
Renesas Technology Corp
R2A20134SP RENESAS-R2A20134SP Datasheet
112Kb / 11P
   LED Lighting Power Controller
R2A20134SP RENESAS-R2A20134SP_15 Datasheet
112Kb / 11P
   LED Lighting Power Controller
logo
ON Semiconductor
NCL30086 ONSEMI-NCL30086 Datasheet
378Kb / 28P
   Controller for LED Lighting
February, 2015 ??Rev. 2
logo
Renesas Technology Corp
R2A20134ASP RENESAS-R2A20134ASP_16 Datasheet
735Kb / 14P
   LED Lighting Power Controller
logo
Texas Instruments
UCC28810 TI1-UCC28810_15 Datasheet
1Mb / 34P
[Old version datasheet]   LED LIGHTING POWER CONTROLLER
logo
Renesas Technology Corp
R2A20135SP RENESAS-R2A20135SP_16 Datasheet
290Kb / 12P
   LED Lighting Power Controller
R2A20134ASP RENESAS-R2A20134ASP Datasheet
734Kb / 14P
   LED Lighting Power Controller
Jan 08, 2016
R2A20134SP RENESAS-R2A20134SP_16 Datasheet
276Kb / 11P
   LED Lighting Power Controller
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14


Folha de dados Download

Go To PDF Page


Ligação URL




Privacy Policy
ALLDATASHEETPT.COM
ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   roca de Link   |   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