Electronic Components Datasheet Search
  English  ▼

X  

Preview PDF HTML

TPS23754PWPR Datasheet(PDF) 7 Page - Texas Instruments

Click here to check the latest version.
Part # TPS23754PWPR
Description  High Power/High Efficiency PoE Interface and DC/DC Controller
PDF  41 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS23754PWPR Datasheet(HTML) 7 Page - Texas Instruments

Back Button TPS23754PWPR Datasheet HTML 3Page - Texas Instruments TPS23754PWPR Datasheet HTML 4Page - Texas Instruments TPS23754PWPR Datasheet HTML 5Page - Texas Instruments TPS23754PWPR Datasheet HTML 6Page - Texas Instruments TPS23754PWPR Datasheet HTML 7Page - Texas Instruments TPS23754PWPR Datasheet HTML 8Page - Texas Instruments TPS23754PWPR Datasheet HTML 9Page - Texas Instruments TPS23754PWPR Datasheet HTML 10Page - Texas Instruments TPS23754PWPR Datasheet HTML 11Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 41 page
background image
PAD=V
SS
N/C=LeavePinUnused
TPS23754-1
1
2
3
4
5
6
7
15
14
13
11
12
8
16
V
DD
DEN
DT
FRS
CLS
GATE
RTN
V
C
CS
V
SS
V
B
CTL
T2P
BLNK
GAT2
10
9
19
18
17
20
PAD=V
SS
APD
ARTN
COM
TPS23754/6
PPD
V
DD1
1
2
3
4
5
6
7
15
14
13
11
12
8
16
V
DD
DEN
DT
FRS
CLS
GATE
RTN
V
C
CS
V
SS
V
B
CTL
T2P
BLNK
GAT2
10
9
19
18
17
20
APD
ARTN
COM
N/C
V
DD1
TPS23754
TPS23754-1
TPS23756
www.ti.com ....................................................................................................................................................... SLVS885B – OCTOBER 2008 – REVISED MAY 2009
(TOP VIEW)
PIN FUNCTIONS
NO.
NAME
TYPE
DESCRIPTION
'754/6
‘754-1
CTL
1
1
I
The control loop input to the PWM (pulse width modulator), typically driven by output regulation
feedback (e.g. optocoupler). Use VB as a pullup for CTL.
VB
2
2
O
5.1 V bias rail for dc/dc control circuits and the feedback optocoupler. Typically bypass with a 0.1
µF
to ARTN.
CS
3
3
I/O
DC/DC converter switching MOSFET current sense input. See RCS in Figure 1.
COM
4
4
Gate driver return, connect to ARTN and RTN.
GATE
5
5
O
Gate drive output for the main dc/dc converter switching MOSFET.
VC
6
6
I/O
DC/DC converter bias voltage. Connect a 0.47
µF (minimum) ceramic capacitor to ARTN at the pin,
and a larger capacitor to power startup.
GAT2
7
7
O
Gate drive output for a second dc/dc converter switching MOSFET (see Figure 1).
ARTN
8
8
ARTN is the dc/dc converter analog return. Tie to RTN and COM on the circuit board.
RTN
9
9
RTN is the output of the PoE hotswap MOSFET.
VSS
10
10
Connect to the negative power rail derived from the PoE source.
VDD1
11
11
I
Source of dc/dc converter startup current. Connect to VDD for many applications.
VDD
12
12
I
Connect to the positive PoE input power rail. VDD powers the PoE interface circuits. Bypass with a
0.1
µF capacitor and protect with a TVS.
DEN
13
13
I/O
Connect a 24.9 k
Ω resistor from DEN to VDD to provide the PoE detection signature. Pulling this pin
to VSS during powered operation causes the internal hotswap MOSFET to turn off.
NC
–
14
Float this no-connect pin.
PPD
14
–
I
Raising VPPD-VSS above 1.55 V enables the hotswap MOSFET and activates T2P. Connecting PPD
to VDD enables classification when APD is active. Tie PPD to VSS or float when not used.
CLS
15
15
I
Connect a resistor from CLS to VSS to program classification current. 2.5 V is applied to the program
resistor during classification to set class current.
DT
16
16
I
Connect a resistor from DT to ARTN to set the GATE to GAT2 dead time. Tie DT to VB to disable
GAT2 operation.
APD
17
17
I
Raising VAPD-VARTN above 1.5 V disables the internal hotswap switch, turns class off, and forces T2P
active. This forces power to come from a external VDD1-RTN adapter. Tie APD to ARTN when not
used.
BLNK
18
18
I
Connect to ARTN to utilize the internally set current-sense blanking period, or connect a resistor from
BLNK to ARTN to program a more accurate period.
FRS
19
19
I
Connect a resistor from FRS to ARTN to program the converter switching frequency. FRS may be
used to synchronize the converter to an external timing source.
T2P
20
20
O
Active low output that indicates a PSE has performed the IEEE 802.3at type 2 hardware
classification, PPD is active, or APD is active.
Pad
–
–
Connect to VSS.
Copyright © 2008–2009, Texas Instruments Incorporated
Submit Documentation Feedback
7
Product Folder Link(s): TPS23754 TPS23754-1 TPS23756



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 39 40 41


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
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