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

X  

TPS54615 Fiches technique(PDF) 10 Page - Texas Instruments

Click here to check the latest version.
No de pièce TPS54615
Description  TPS5461x 3-V to 6-V Input, 6-A Output Synchronous Buck PWM Switcher With Integrated FETs (SWIFT??
Download  28 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS54615 Fiches technique(HTML) 10 Page - Texas Instruments

Back Button TPS54615 Datasheet HTML 6Page - Texas Instruments TPS54615 Datasheet HTML 7Page - Texas Instruments TPS54615 Datasheet HTML 8Page - Texas Instruments TPS54615 Datasheet HTML 9Page - Texas Instruments TPS54615 Datasheet HTML 10Page - Texas Instruments TPS54615 Datasheet HTML 11Page - Texas Instruments TPS54615 Datasheet HTML 12Page - Texas Instruments TPS54615 Datasheet HTML 13Page - Texas Instruments TPS54615 Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 28 page
background image
(SS)
(SS)
0.7 V
t
C
5 A
=
´
m
d
(SS)
1.2 V
t
C
5 A
=
´
m
TPS54611, TPS54612, TPS54613
TPS54614, TPS54615, TPS54616
SLVS400D – AUGUST 2001 – REVISED JANUARY 2015
www.ti.com
Feature Description (continued)
7.3.2 Slow-Start and Enable (SS/ENA)
The slow-start/enable pin provides two functions. First, the pin acts as an enable (shutdown) control by keeping
the device turned off until the voltage exceeds the start threshold voltage of approximately 1.2 V. When SS/ENA
exceeds the enable threshold, device start up begins. The reference voltage fed to the error amplifier is linearly
ramped up from 0 V to 0.891 V in 3.35 ms. Similarly, the converter output voltage reaches regulation in
approximately 3.35 ms. Voltage hysteresis and a 2.5-µs falling edge deglitch circuit reduce the likelihood of
triggering the enable due to noise. Refer to Table 1 for startup times for each device.
Table 1. Device Startup Times
DEVICE
OUTPUT VOLTAGE
SLOW-START
TPS54611
0.9 V
3.3 ms
TPS54612
1.2 V
4.5 ms
TPS54613
1.5 V
5.6 ms
TPS54614
1.8 V
3.3 ms
TPS54615
2.5 V
4.7 ms
TPS54616
3.3 V
6.1 ms
The second function of the SS/ENA pin provides an external means for extending the slow-start time with a
ceramic capacitor connected between SS/ENA and AGND. Adding a capacitor to the SS/ENA pin has two effects
on start-up. First, a delay occurs between release of the SS/ENA pin and start-up of the output. The delay is
proportional to the slow-start capacitor value and lasts until the SS/ENA pin reaches the enable threshold. The
start-up delay is approximately:
(1)
Second, as the output becomes active, a brief ramp up at the internal slow-start rate may be observed before the
externally set slow-start rate takes control and the output rises at a rate proportional to the slow-start capacitor.
The slow-start time set by the capacitor is approximately:
(2)
The actual slow-start time is likely to be less than the above approximation due to the brief ramp up at the
internal rate
7.3.3 VBIAS Regulator
The VBIAS regulator provides internal analog and digital blocks with a stable supply voltage over variations in
junction temperature and input voltage. A high quality, low-ESR, ceramic bypass capacitor is required on the
VBIAS pin. X7R or X5R grade dielectrics are recommended because their values are more stable over
temperature. The bypass capacitor should be placed close to the VBIAS pin and returned to AGND.
External loading on VBIAS is allowed, with the caution that internal circuits require a minimum VBIAS of 2.7 V,
and external loads on VBIAS with ac or digital switching noise may degrade performance. The VBIAS pin may be
useful as a reference voltage for external circuits.
7.3.4 Voltage Reference
The voltage reference system produces a precise, temperature-stable voltage from a bandgap circuit. A scaling
amplifier and DAC are then used to produce the reference voltages for each of the fixed output devices.
7.3.5 Oscillator and PWM Ramp
The oscillator frequency can be set to internally fixed values of 350 kHz or 550 kHz using the FSEL pin as a
static digital input. If a different frequency of operation is required for the application, the oscillator frequency can
be externally adjusted from 280 kHz to 700 kHz by connecting a resistor from the RT pin to AGND and floating
the FSEL pin. The switching frequency is approximated by the following equation, where R is the resistance from
RT to AGND
10
Submit Documentation Feedback
Copyright © 2001–2015, Texas Instruments Incorporated
Product Folder Links: TPS54611 TPS54612 TPS54613 TPS54614 TPS54615 TPS54616


Numéro de pièce similaire - TPS54615

FabricantNo de pièceFiches techniqueDescription
logo
Texas Instruments
TPS54615 TI-TPS54615 Datasheet
289Kb / 16P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs
TPS54615 TI-TPS54615 Datasheet
1,012Kb / 24P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT)
TPS54615 TI-TPS54615 Datasheet
1,012Kb / 24P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT)
TPS54615-EP TI1-TPS54615-EP Datasheet
967Kb / 22P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs
TPS54615-Q1 TI-TPS54615-Q1 Datasheet
256Kb / 18P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs(SWIFT)
More results

Description similaire - TPS54615

FabricantNo de pièceFiches techniqueDescription
logo
Texas Instruments
TPS54611-Q1 TI-TPS54611-Q1 Datasheet
256Kb / 18P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs(SWIFT)
TPS54611-EP TI1-TPS54611-EP Datasheet
789Kb / 21P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT??
TPS54611 TI1-TPS54611 Datasheet
1Mb / 24P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT??
TPS54616MPWPREP TI-TPS54616MPWPREP Datasheet
1,012Kb / 24P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT)
TPS54610PWPR TI-TPS54610PWPR Datasheet
1,019Kb / 24P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT??
TPS54610-EP TI1-TPS54610-EP Datasheet
829Kb / 24P
[Old version datasheet]   3 V TO 6 V INPUT, 6 A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT??
TPS54612MPWPREP TI-TPS54612MPWPREP Datasheet
1,012Kb / 24P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT)
TPS54610-Q1 TI1-TPS54610-Q1 Datasheet
546Kb / 23P
[Old version datasheet]   3-V TO 6-V INPUT, 6-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT??
TPS54310-EP TI1-TPS54310-EP_16 Datasheet
743Kb / 21P
[Old version datasheet]   3-V TO 6-V INPUT, 3-A OUTPUT, SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT)
TPS54310PWPRG4 TI-TPS54310PWPRG4 Datasheet
739Kb / 21P
[Old version datasheet]   3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT??
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


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