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

X  

TPS23750PWPG4 Datasheet(PDF) 10 Page - Texas Instruments

No. de pieza TPS23750PWPG4
Descripción Electrónicos  INTEGRATED 100-V IEEE 802.3af PD AND DC/DC CONTROLLER
Download  38 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

TPS23750PWPG4 Datasheet(HTML) 10 Page - Texas Instruments

Back Button TPS23750PWPG4 Datasheet HTML 6Page - Texas Instruments TPS23750PWPG4 Datasheet HTML 7Page - Texas Instruments TPS23750PWPG4 Datasheet HTML 8Page - Texas Instruments TPS23750PWPG4 Datasheet HTML 9Page - Texas Instruments TPS23750PWPG4 Datasheet HTML 10Page - Texas Instruments TPS23750PWPG4 Datasheet HTML 11Page - Texas Instruments TPS23750PWPG4 Datasheet HTML 12Page - Texas Instruments TPS23750PWPG4 Datasheet HTML 13Page - Texas Instruments TPS23750PWPG4 Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 38 page
background image
www.ti.com
R
FREQ
(kW) +
15000
Switching_Frequency (kHz)
(1)
TPS23750
TPS23770
SLVS590A – JULY 2005 – REVISED AUGUST 2005
The COMP output should not be over-driven when the internal error amplifier is active. The amplifier can source
and sink significant currents which will greatly increase power dissipation. TMR may be pulled low to turn the
converter off when the internal error amplifier is used. The error amplifier will source current when COMP is
pulled below its saturated low voltage due to the nature of the class AB amplifier stage.
DET – Connect a 24.9 k
Ω, ±1% resistor (R
DET), between DET and VDD. RDET is connected across the input line
when VDD lies between 1.4 V and 10.1 V, and is disconnected when the line voltage exceeds 12 V to conserve
power. RDET may be adjusted to compensate for input diode characteristics.
FB – This is the internal dc/dc converter error amplifier’s inverting input. FB is used for output voltage feedback
and loop compensation. FB equals 1.5 V when the feedback loop is in regulation. FB should be tied to RTN
when the error amplifier is disabled using MODE. The internal level translator drives this pin with a source
impedance of about 15 k
Ω when it is enabled using SEN.
FREQ – A resistor connected from FREQ to RTN programs the converter switching frequency. This feature
allows an existing design to be easily upgraded to use the TPS23750 without requiring redesign of the magnetics
and filtering. While the oscillator is characterized between 100 kHz and 500 kHz, it operates properly down to a
frequency of a few kilohertz.
Although this expression is reasonably accurate, the frequency will be slightly lower than predicted at higher
frequencies.
FREQ must not be shorted to ground or have voltage applied.
GATE – DC/DC converter’s switching MOSFET driver output. This pin has an internal pull-down to keep the
external switching MOSFET off when the converter is inactive.
MODE –This pin disables the converter error amplifier, allowing an optocoupler to drive the PWM comparator
directly from COMP. Connecting MODE to RTN enables the error amplifier, and to V
BIAS disables it. MODE
should not be left floating.
RSN – This pin is the current-mode controller’s quiet "ground" reference for current sensing and other low-level
signals. RTN, RSN, and COM should be tied together.
RSP – This pin is the current-mode controller’s current-sense input. Current-mode control monitors the switching
MOSFET peak current, which is sensed as voltage between RSP and RSN, to set the PWM duty cycle. The
peak current limit is established by limiting the maximum sense voltage to about 0.5 V.
MOSFET current may rise to high levels during the blanking period when there is a short in the power circuit. If
the RSP peak voltage exceeds 0.75 V on four successive switching cycles, the converter is turned off and a
hiccup cycle is started.
If the blanking is sufficient to eliminate the need for an input RC filter, this pin may be directly connected to the
sense resistor.
RTN – An internal MOSFET connects this pin to V
SS. This MOSFET is controlled by the PoE section UVLO,
inrush limit, current limit, thermal limit, and fault voltage limiting.
Most applications connect RSN, COM, and RTN together through a ground plane.
SEN – SEN is the negative input for the level translator. It can be used in buck converters as demonstrated in
Figure 40. The translator is enabled by connecting SEN above 1 V with respect to V
SS. The level translator
applies V
SENP-SEN to the FB pin through an internal 15 kΩ resistor. This feature simplifies feedback voltage
sensing above RTN. Connect SEN to RSN if the level translator is not used.
SENP – SENP is the positive input for the level translator. It is used in conjunction with SEN as demonstrated in
Figure 40. The presence of this pin allows a filter inductor to be placed in the positive power rail between V
DD
and the output. Connect SENP to V
DD when the level translator is disabled. The voltage on SENP should always
be greater than the voltage on SEN.
TMR – Connect a capacitor from TMR to RTN to program the softstart and hiccup timer functions. Pull this pin to
RTN to disable the converter.
10


Número de pieza similar - TPS23750PWPG4

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Texas Instruments
TPS23750PWPG4 TI1-TPS23750PWPG4 Datasheet
1Mb / 41P
[Old version datasheet]   INTEGRATED 100-V IEEE 802.3af PD AND DC/DC CONTROLLER
More results

Descripción similar - TPS23750PWPG4

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Texas Instruments
TPS23750EVM-108 TI1-TPS23750EVM-108 Datasheet
1Mb / 41P
[Old version datasheet]   INTEGRATED 100-V IEEE 802.3af PD AND DC/DC CONTROLLER
logo
Kinetic Technologies.
KTA1136 KINETIC-KTA1136 Datasheet
1Mb / 22P
   IEEE 802.3af PoE PD with Integrated DC-DC Controller and 13W Power FET
January 2021 - Revision 04a
logo
ON Semiconductor
NCP1090DBRG ONSEMI-NCP1090DBRG Datasheet
176Kb / 12P
   Integrated IEEE 802.3af PoE-PD Interface Controller
February, 2011 ??Rev. 2
NCP1092DG ONSEMI-NCP1092DG Datasheet
176Kb / 12P
   Integrated IEEE 802.3af PoE-PD Interface Controller
February, 2011 ??Rev. 2
NCP1091DBRG ONSEMI-NCP1091DBRG Datasheet
176Kb / 12P
   Integrated IEEE 802.3af PoE-PD Interface Controller
February, 2011 ??Rev. 2
NCP1090 ONSEMI-NCP1090 Datasheet
176Kb / 12P
   Integrated IEEE 802.3af PoE-PD Interface Controller
February, 2011 ??Rev. 2
NCP1092DBRG ONSEMI-NCP1092DBRG Datasheet
176Kb / 12P
   Integrated IEEE 802.3af PoE-PD Interface Controller
February, 2011 ??Rev. 2
logo
Silicon Laboratories
SI3460 SILABS-SI3460 Datasheet
435Kb / 22P
   IEEE 802.3af PSE INTERFACE AND DC-DC CONTROLLER
logo
Kinetic Technologies.
KTA1137A KINETIC-KTA1137A Datasheet
980Kb / 22P
   IEEE 802.3at PoE PD with Integrated DC-DC Controller
November 2019 - Revision 04a
logo
Texas Instruments
TPS2376-H TI-TPS2376-H Datasheet
590Kb / 22P
[Old version datasheet]   IEEE 802.3af PoE HIGH POWER PD CONTROLLER
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 32 33 34 35 36 37 38


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