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TPS23754PWP PDF预览

TPS23754PWP

更新时间： 2024-11-15 07:04:47
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德州仪器 - TI 控制器
页数 文件大小 规格书
41页 1675K
描述
High Power/High Efficiency PoE Interface and DC/DC Controller

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TPS23754PWP 数据手册

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TPS23754  
TPS23754-1  
TPS23756  
www.ti.com ....................................................................................................................................................... SLVS885B–OCTOBER 2008–REVISED MAY 2009  
High Power/High Efficiency PoE Interface and DC/DC Controller  
1
FEATURES  
The TPS23754/6 supports a number of input voltage  
2
•
Powers up to 30 W (input) PDs  
ORing options including highest voltage, external  
adapter preference, and PoE preference. These  
features allow the designer to determine which power  
source will carry the load under all conditions.  
•
DC/DC Control Optimized for Isolated  
Converters  
•
•
•
Supports High-efficiency Topologies  
Complete PoE Interface  
The PoE interface features the new extended  
hardware classification necessary for compatibility  
with high-power midspan power sourcing equipment  
(PSE) per IEEE 802.3at (draft). The detection  
signature pin can also be used to force power from  
the PoE source off. Classification can be  
programmed to any of the defined types with a single  
resistor.  
Enhanced Classification per IEEE 802.3at  
(Draft) with Status Flag  
•
•
Adapter ORing Support  
Programmable Frequency with  
Synchronization  
•
•
•
Robust 100 V, 0.5 Ω Hotswap MOSFET  
–40°C to 125°C Junction Temperature Range  
Industry Standard PowerPAD™ TSSOP-20  
The dc/dc controller features two complementary gate  
drivers with programmable dead time. This simplifies  
design of active-clamp forward converters or  
optimized gate drive for highly-efficient flyback  
topologies. The second gate driver may be disabled if  
desired for single MOSFET topologies. The controller  
also features internal softstart, bootstrap startup  
source, current-mode compensation, 78% maximum  
duty cycle. A programmable and synchronizable  
oscillator allows design optimization for efficiency and  
eases use of the controller to upgrade existing power  
supply designs. Accurate programmable blanking,  
APPLICATIONS  
•
•
•
•
•
IEEE 802.3at (Draft) Compliant Devices  
Video and VoIP Telephones  
RFID Readers  
Multiband Access Points  
Security Cameras  
DESCRIPTION  
with  
a
default period, simplifies the usual  
current-sense filter design trade-offs.  
The TPS23754/6 is a combined Power over Ethernet  
(PoE) powered device (PD) interface and  
current-mode dc/dc controller optimized specifically  
for isolated converters. The PoE interface supports  
the IEEE 802.3at (draft) standard.  
The TPS23754 has a 15 V converter startup while the  
TPS23756 has  
a 9 V converter startup. The  
TPS23754-1 replaces the PPD pin with a no-connect  
for increased pin spacing.  
CIO  
T1  
VOUT  
CIN  
LOUT  
M4  
RT2P-OUT  
T2P  
DVC1  
DEN  
CLS  
RT2P  
VC  
COUT  
VT2P-OUT  
LVC  
M3  
N/C OR PPD  
PAD  
DVC2  
Type 2 PSE  
Indicator  
M1  
VB  
GATE  
CS  
VSS  
CC  
VB  
RCTL  
APD  
CTL  
FRS  
ROB  
CIZ  
M2  
CCTL  
DA  
GAT2  
CCL  
RAPD1  
DCL  
TLV431  
RDT  
Optional  
Interface  
Figure 1. High Efficiency Converter Using TPS23754  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
PowerPAD is a trademark of Texas Instruments.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008–2009, Texas Instruments Incorporated  
 
 
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TPS23754PWP 替代型号

型号 品牌 替代类型 描述 数据表
TPS23754PWPR TI

完全替代

 High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23756PWPR TI

完全替代

 High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23754PWP-1 TI

完全替代

 High Power/High Efficiency PoE Interface and DC/DC Controller

与TPS23754PWP相关器件

型号 品牌 获取价格 描述 数据表
TPS23754PWP-1 TI

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 		High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23754PWPR TI

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 		High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23754PWPR-1 TI

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 		High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23755 TI

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 		具有非光电反激式直流/直流控制器的 IEEE 802.3at PoE PD
TPS23755RJJR TI

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 		具有非光电反激式直流/直流控制器的 IEEE 802.3at PoE PD | RJJ |
TPS23755RJJT TI

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 		具有非光电反激式直流/直流控制器的 IEEE 802.3at PoE PD | RJJ |
TPS23756 TI

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 		High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23756PWP TI

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 		High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23756PWPR TI

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 		High Power/High Efficiency PoE Interface and DC/DC Controller
TPS23757 TI

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 		High Efficiency PoE Interface and DC/DC Controller

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