Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

TPS62110QRSARQ1 Fiches technique(PDF) 10 Page - Texas Instruments

Click here to check the latest version.
No de pièce TPS62110QRSARQ1
Description  17-V 1.5-A SYNCHRONOUS STEP-DOWN CONVERTER
Download  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS62110QRSARQ1 Fiches technique(HTML) 10 Page - Texas Instruments

Back Button TPS62110QRSARQ1 Datasheet HTML 6Page - Texas Instruments TPS62110QRSARQ1 Datasheet HTML 7Page - Texas Instruments TPS62110QRSARQ1 Datasheet HTML 8Page - Texas Instruments TPS62110QRSARQ1 Datasheet HTML 9Page - Texas Instruments TPS62110QRSARQ1 Datasheet HTML 10Page - Texas Instruments TPS62110QRSARQ1 Datasheet HTML 11Page - Texas Instruments TPS62110QRSARQ1 Datasheet HTML 12Page - Texas Instruments TPS62110QRSARQ1 Datasheet HTML 13Page - Texas Instruments TPS62110QRSARQ1 Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 24 page
background image
TPS62110-Q1
SLVSA54 – FEBRUARY 2010
www.ti.com
DETAILED DESCRIPTION
OPERATION
The TPS62110 is a synchronous step-down converter that operates with a 1-MHz fixed frequency pulse width
modulation (PWM) at moderate-to-heavy load currents and enters the power save mode at light load current.
During PWM operation, the converter uses a unique fast response voltage mode control scheme with input
voltage feed-forward. Good line and load regulation is achieved with the use of small input and output ceramic
capacitors. At the beginning of each clock cycle initiated by the clock signal (S), the P-channel MOSFET switch
is turned on, and the inductor current ramps up until the comparator trips and the control logic turns the switch
off. The switch is turned off by the current limit comparator if the current limit of the P-channel switch is
exceeded. After the dead time prevents current shoot through, the N-channel MOSFET rectifier is turned on, and
the inductor current ramps down. The next cycle is initiated by the clock signal turning off the N-channel rectifier,
and turning on the P-channel switch.
The error amplifier as well as the input voltage determines the rise time of the sawtooth generator. Therefore,
any change in input voltage or output voltage directly controls the duty cycle of the converter giving a very good
line and load transient regulation.
CONSTANT FREQUENCY MODE OPERATION (SYNC = HIGH)
In constant frequency mode, the output voltage is regulated by varying the duty cycle of the PWM signal in the
range of 100% to 10%. Connecting the SYNC pin to a voltage greater than 1.5 V forces the converter to operate
permanently in the PWM mode even at light or no-load currents. The advantage is that the converter operates
with a fixed switching frequency that allows simple filtering of the switching frequency for noise-sensitive
applications. In this mode, the efficiency is lower compared to the power save mode during light loads. The
N-MOSFET of the devices stay on even when the current into the output drops to zero. This prevents the device
from going into discontinuous mode, and the device transfers unused energy back to the input. Therefore, there
is no ringing at the output, which usually occurs in discontinuous mode. The duty cycle range in constant
frequency mode is 100% to 10%.
It is possible to switch from forced PWM mode to the power save mode during operation by pulling the SYNC pin
LOW. The flexible configuration of the SYNC pin during operation of the device allows efficient power
management by adjusting the operation of the TPS62110 to the specific system requirements.
POWER SAVE MODE OPERATION (SYNC = LOW)
As the load current decreases, the converter enters the power save mode operation. During power save mode,
the converter operates with reduced switching frequency in pulse frequency modulation (PFM), and with a
minimum quiescent current to maintain high efficiency. Whenever the average output current goes below the skip
threshold, the converter enters the power save mode. The average current depends on the input voltage. It is
about 200 mA at low input voltages and up to 400 mA with maximum input voltage. The average output current
must be below the threshold for at least 32 clock cycles to enter the power save mode. During the power save
mode, the output voltage is monitored with a comparator and the output voltage is regulated in to a typical value
between the nominal output voltage and 0.8% above the nominal output voltage. When the output voltage falls
below the nominal output voltage, the P-channel switch turns on. The P-channel switch is turned off as the peak
switch current is reached. The N-channel rectifier is turned on, and the inductor current ramps down. As the
inductor current approaches zero, the N-channel rectifier is turned off and the switch is turned on starting the
next pulse. When the output voltage can not be reached with a single pulse, the device continues to switch with
its normal operating frequency until the comparator detects the output voltage to be 0.8% above the nominal
output voltage. This control method reduces the quiescent current to 20 µA (typical), and reduces the switching
frequency to a minimum that achieves the highest converter efficiency.
10
Submit Documentation Feedback
Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS62110-Q1


Numéro de pièce similaire - TPS62110QRSARQ1

FabricantNo de pièceFiches techniqueDescription
logo
Texas Instruments
TPS62110 TI-TPS62110 Datasheet
960Kb / 28P
[Old version datasheet]   17-V, 1.5-A, SYNCHRONOUS STEP-DOWN CONVERTER
TPS62110 TI-TPS62110 Datasheet
1Mb / 158P
[Old version datasheet]   Digital Signal Controller (DSC)
TPS62110-EP TI1-TPS62110-EP Datasheet
797Kb / 25P
[Old version datasheet]   17 V, 1.5 A, SYNCHRONOUS STEP-DOWN CONVERTER
TPS62110-EP TI1-TPS62110-EP Datasheet
1,018Kb / 25P
[Old version datasheet]   17 V, 1.5 A, SYNCHRONOUS STEP-DOWN CONVERTER
TPS62110-EP TI1-TPS62110-EP_16 Datasheet
1,018Kb / 25P
[Old version datasheet]   17 V, 1.5 A, SYNCHRONOUS STEP-DOWN CONVERTER
More results

Description similaire - TPS62110QRSARQ1

FabricantNo de pièceFiches techniqueDescription
logo
Texas Instruments
TPS62110 TI-TPS62110 Datasheet
960Kb / 28P
[Old version datasheet]   17-V, 1.5-A, SYNCHRONOUS STEP-DOWN CONVERTER
TPS62110-EP TI1-TPS62110-EP_16 Datasheet
1,018Kb / 25P
[Old version datasheet]   17 V, 1.5 A, SYNCHRONOUS STEP-DOWN CONVERTER
TPS62110-EP TI1-TPS62110-EP Datasheet
797Kb / 25P
[Old version datasheet]   17 V, 1.5 A, SYNCHRONOUS STEP-DOWN CONVERTER
TPS62110-HT TI1-TPS62110-HT Datasheet
700Kb / 25P
[Old version datasheet]   17-V, 1.5-A, SYNCHRONOUS STEP-DOWN CONVERTER
TPS62110 TI-TPS62110_15 Datasheet
1Mb / 34P
[Old version datasheet]   TPS6211x 17-V, 1.5-A, Synchronous Step-Down Converter
LMR36015-Q1 TI1-LMR36015-Q1 Datasheet
2Mb / 34P
[Old version datasheet]   4.2-V to 60-V, 1.5-A Synchronous Step-Down Converter
LMR23615 TI1-LMR23615 Datasheet
1Mb / 32P
[Old version datasheet]   SIMPLE SWITCHER 36-V, 1.5-A Synchronous Step-Down Converter
LMR23615 TI1-LMR23615_18 Datasheet
2Mb / 37P
[Old version datasheet]   SIMPLE SWITCHER 36-V, 1.5-A Synchronous Step-Down Converter
LMR23615-Q1 TI1-LMR23615-Q1 Datasheet
2Mb / 36P
[Old version datasheet]   SIMPLE SWITCHER 36-V, 1.5-A Synchronous Step-Down Converter
TPS54821 TI1-TPS54821_16 Datasheet
1Mb / 42P
[Old version datasheet]   4.5 V to 17 V Input, 8 A Synchronous Step Down Converter
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


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
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