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TPS23757
www.ti.com
SLVS948D – JULY 2009 – REVISED NOVEMBER 2013
High Efficiency PoE Interface and DC/DC Controller
1
FEATURES
The TPS23757 supports a number of input voltage
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Powers up to 13 W (Input) PDs
Legacy and IEEE 802.3at Type 1 PDs
Optimized for Isolated DC/DC Converters
Supports High-Efficiency Topologies
Complete PoE Interface
Adapter ORing Support
Programmable Frequency with Synch.
Robust 100 V, 0.5 ? Hotswap MOSFET
Pin Compatible with TPS23754/6
–40°C to 125°C Junction Temperature Range
Industry Standard TSSOP-20
ORing options including highest voltage, external
adapter preference, and PoE preference.
The TPS23757 has an output flag indicating if an
external wall adapter is active when used in
conjunction with ORing controls. 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.
The dc/dc controller features two complementary gate
drivers with programmable dead time. This simplifies
design of highly-efficient flyback topologies or active-
clamp forward or flyback converters. The second gate
driver may be disabled if desired for single MOSFET
APPLICATIONS
topologies. The controller also features internal
softstart, bootstrap startup source, current-mode
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IEEE 802.3at Type 1 Compliant Devices
Video and VoIP Telephones
Access Points
Security Cameras
compensation, and a 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, with a
default period, simplifies the usual current- sense
DESCRIPTION
The TPS23757 is a combined Power over Ethernet
(PoE) powered device (PD) interface and current-
filter design trade-offs.
The TPS23757 has a 9 V converter startup,
permitting operation with 12 V wall adapters.
mode dc/dc controller optimized specifically for
isolated converters. The PoE interface supports the
IEEE 802.3at standard for a type 1 PD, which is
equivalent to the 13W standard of IEEE 802.3-2008.
T1
C IN
L OUT
V OUT
DEN
PPD
CLS
APb
V C
R APb
M1
V B
D VC1
R APb_OUT
V APb_OUT
Adapter
D A
V SS
APD
CTL
FRS
V B
GATE
CS
GAT2
M2
R OB
C IZ
Present and
Converter
Running
T2
R APD1
TLV431
Optional
Interface
C IO
Figure 1. High Efficiency Converter Using TPS23757
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.
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 ? 2009–2013, Texas Instruments Incorporated
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相关代理商/技术参数
TPS23757PW 功能描述:热插拔功率分布 Hi Eff PoE Inter & DC/DC Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
TPS23757PWR 功能描述:热插拔功率分布 Hi Eff PoE Interface & DC/DC Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
TPS2375D 功能描述:热插拔功率分布 IEEE 802.3af PoE Pwr Device Cntrler RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
TPS2375D 制造商:Texas Instruments 功能描述:POWER OVER ETHERNET ((NW))
TPS2375DG4 功能描述:热插拔功率分布 IEEE 802.3af PoE Pwr Device Cntrler RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
TPS2375DR 功能描述:热插拔功率分布 IEEE 802.3af PoE Pwr Device Cntrler RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
TPS2375DRG4 功能描述:热插拔功率分布 IEEE 802.3af PoE Pwr Device Cntrler RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
TPS2375EVM 功能描述:电源管理IC开发工具 TPS2375 POE Powed Device Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V