--- 產(chǎn)品詳情 ---
Vin (Min) (V) | 21.5 |
Vin (Max) (V) | 57 |
ILIM | 650mA TYP |
PoE standards supported | 802.3at Type 1 (802.3af) |
FET | Internal |
MPS method | AC/DC Disconnect |
Pair control | 2-Pair Alt A or B |
Operating temperature range (C) | -40 to 125 |
Features | Integrated FET, Over Current Reporting, Over Temp Reporting |
Number of PSE ports | 4 |
- Quad-Port Power Management With Integrated Switches and Sense Resistors
- High Power PoE up to 25 W at PD Input Operating from a 53-V Minimum Input Power Rail
- Wide Range Single Supply: 21.5 V up to 57 V
- ICUT = 615 mA, ILIM = 650 mA Nominal
- IEEE 802.3af Compatible
- Individual Port 15-bit A/D Converters
- Auto, Semi-Auto and Power Management Modes
- Controlled Current Ramp Power-Up/Down for EMI Reduction
- Over-Temperature Protection
- DC Disconnect Detection, Supports AC Disconnect
- High-Speed 400-kHz I2C Interface
- Supports Legacy PD Detection
- PowerPAD? Package
- Comprehensive Power Management Software Available for MPS430 Microcontroller
- APPLICATIONS
- Medical/Industrial Applications at 24 V
- High Power Ethernet Enterprise Switches
- SOHO Hubs, Ethernet Hubs
- Ethernet High Power Mid-Spans
- High Power PSE Injectors
PowerPAD is a trademark of Texas Instruments.
The TPS23841 is a high-power, wide voltage range, quad-port sourcing equipment manager. The TPS23841 can provide up to 570 mA per port over a wide temperature range (-40°C to +125°C). Each port may operate from 21.5 V up to 57 V. The integrated output eliminates two external components per port (MOSFET and sense resistor) and survives 100-V transients. Four individual 15-bit A/D converters are used to measure signature resistance, voltage, current and die temperature, resulting in a simple and robust PSE solution. The TPS23841 comes with a comprehensive software solution to meet the most demanding applications which can serve as a core for all PoE system designs.
The TPS23841 has three internal supply buses (10 V, 6.3 V and 3.3 V) generated from the 48-V input supply. These supplies are used to bias all internal digital and analog circuitry. Each supply has been brought out separately for proper bypassing to insure high performance. The digital supply (3.3 V) is available for powering external loads up to 2 mA. For more demanding loads it is highly recommended to use external buffers to prevent system degradation. When the TPS23841 is initially powered up an internal Power-on-Reset (POR) circuit resets all registers and sets all ports to the off state to ensure that the device is powered up in a known safe operating state.
The TPS23841 has three modes of operation; auto mode (AM), semi-auto mode (SAM) and power management mode (PMM).
- In auto mode the TPS23841 performs discovery, classification and delivery of power autonomously to a compliant PD without the need of a micro-controller.
- In semi-auto mode the TPS23841 operates in auto mode but users can access the contents of all read status registers and A/D registers through the I2C serial interface. All write control registers are active except for D0 through D3 of port control register 1 (Address 0010) for limited port control. The semi-auto mode allows the TPS23841 to detect valid PD's without micro-controller intervention but adds a flexibility to perform power management activities.
- Power management mode (with a micro-controller) allows users additional capabilities of discovering non-compliant (legacy) PDs, performing AC Disconnect and advanced power management system control that are based on real time port voltages and currents. All functions in this mode are programmed and controlled through read/write registers over the I2C interface. This allows users complete freedom in detecting and powering devices. A comprehensive software package is available that mates the power of the TPS23841 with the MSP430 micro-controller.
TPS23841 integrated output stage provides port power and low-side control. The internal low-side circuitry is designed with internal current sensing so there are no external resistors required. The output design ensures the power switches operate in the fully enhanced mode for low power dissipation.
The I2C interface allows easy application of opto-coupler circuitry to maintain Ethernet port isolation when a ground based micro-controller is required. The TPS23841 five address pins (A1-A5) allow the device to be addressed at one of 31 possible I2C addresses. Per-port write registers separately control each port state (discovery, classification, legacy, power up, etc) while the read registers contain status information of the entire process along with parametric values of discovery, classification, and real-time port operating current, voltage and die temperature.
The proprietary 15-bit integrating A/D converter is designed to meet the harsh environment where the PSEPM resides. The converter is set for maximum rejection of power line noise allowing it to make accurate measurements of line currents during discovery, classification and power delivery for reliable power management decisions.
The TPS23841 is available in either 64-pin PowerPAD? down (PAP) or 64-pin PowerPAD up (PJD) packages.
為你推薦
-
TI數(shù)字多路復(fù)用器和編碼器SN54HC1512022-12-23 15:12
-
TI數(shù)字多路復(fù)用器和編碼器SN54LS1532022-12-23 15:12
-
TI數(shù)字多路復(fù)用器和編碼器CD54HC1472022-12-23 15:12
-
TI數(shù)字多路復(fù)用器和編碼器CY74FCT2257T2022-12-23 15:12
-
TI數(shù)字多路復(fù)用器和編碼器SN74LVC257A2022-12-23 15:12
-
TI數(shù)字多路復(fù)用器和編碼器SN74LVC157A2022-12-23 15:12
-
TI數(shù)字多路復(fù)用器和編碼器SN74ALS258A2022-12-23 15:12
-
TI數(shù)字多路復(fù)用器和編碼器SN74ALS257A2022-12-23 15:12
-
TI數(shù)字多路復(fù)用器和編碼器SN74ALS157A2022-12-23 15:12
-
TI數(shù)字多路復(fù)用器和編碼器SN74AHCT1582022-12-23 15:12
-
如何利用運(yùn)算放大器設(shè)計(jì)振蕩電路?2023-08-09 08:08
使用運(yùn)算放大器設(shè)計(jì)振蕩電路運(yùn)算放大器的工作原理發(fā)明運(yùn)算放大器的人絕對(duì)是天才。中間兩端接上電源,當(dāng)同相輸入大于反相輸入,右側(cè)就會(huì)輸出(接近)電源電壓(Vcc),如果反過來小于同相輸入,則輸出0V(負(fù)電源)電壓。在輸出端接上燈泡,假設(shè)我想控制燈泡循環(huán)亮滅,那就需要一會(huì)輸出高電平點(diǎn)亮,一會(huì)輸出低電平熄滅。也就是我需要讓左邊能自動(dòng)變化大小,就能實(shí)現(xiàn)控制燈泡。如何讓電1598瀏覽量 -
【PCB設(shè)計(jì)必備】31條布線技巧2023-08-03 08:09
相信大家在做PCB設(shè)計(jì)時(shí),都會(huì)發(fā)現(xiàn)布線這個(gè)環(huán)節(jié)必不可少,而且布線的合理性,也決定了PCB的美觀度和其生產(chǎn)成本的高低,同時(shí)還能體現(xiàn)出電路性能和散熱性能的好壞,以及是否可以讓器件的性能達(dá)到最優(yōu)等。在上篇內(nèi)容中,小編主要分享了PCB線寬線距的一些設(shè)計(jì)規(guī)則,那么本篇內(nèi)容,將針對(duì)PCB的布線方式,做個(gè)全面的總結(jié)給到大家,希望能夠?qū)︷B(yǎng)成良好的設(shè)計(jì)習(xí)慣有所幫助。1走線長(zhǎng)度1336瀏覽量 -
電動(dòng)汽車直流快充方案設(shè)計(jì)【含參考設(shè)計(jì)】2023-08-03 08:08
大功率直流充電系統(tǒng)架構(gòu)大功率直流充電設(shè)計(jì)標(biāo)準(zhǔn)國(guó)家大功率充電標(biāo)準(zhǔn)“Chaoji”技術(shù)標(biāo)準(zhǔn)設(shè)計(jì)目標(biāo)是未來可實(shí)現(xiàn)電動(dòng)汽車充電5分鐘行駛400公里。“Chaoji”技術(shù)標(biāo)準(zhǔn)主要設(shè)計(jì)參數(shù)如下:最大電壓:目前1000V(可擴(kuò)展到1500V);最大電流:帶冷卻系統(tǒng)500A(可擴(kuò)展到600A);不帶冷卻系統(tǒng)150-200A;最大功率:900KW。大功率直流充電系統(tǒng)架構(gòu)大功率2738瀏覽量 -
Buck電路的原理及器件選型指南2023-07-31 22:28
Buck電路工作原理電源閉合時(shí)電壓會(huì)快速增加,當(dāng)斷開時(shí)電壓會(huì)快速減小,如果開關(guān)速度足夠快的話,是不是就能把負(fù)載,控制在想要的電壓值以內(nèi)呢?假設(shè)12V降壓到5V,也就意味著,MOS管開關(guān)需要42%時(shí)間導(dǎo)通,58%時(shí)間斷開。當(dāng)42%時(shí)間MOS管導(dǎo)通時(shí),電感被充磁儲(chǔ)能,同時(shí)對(duì)電容進(jìn)行充電,給負(fù)載提供電量。當(dāng)58%時(shí)間MOS管斷開時(shí),由于電感上的電流不能突變,電路通 -
100W USB PD 3.0電源2023-07-31 22:27
-
千萬不要忽略PCB設(shè)計(jì)中線寬線距的重要性2023-07-31 22:27
想要做好PCB設(shè)計(jì),除了整體的布線布局外,線寬線距的規(guī)則也非常重要,因?yàn)榫€寬線距決定著電路板的性能和穩(wěn)定性。所以本篇以RK3588為例,詳細(xì)為大家介紹一下PCB線寬線距的通用設(shè)計(jì)規(guī)則。要注意的是,布線之前須把軟件默認(rèn)設(shè)置選項(xiàng)設(shè)置好,并打開DRC檢測(cè)開關(guān)。布線建議打開5mil格點(diǎn),等長(zhǎng)時(shí)可根據(jù)情況設(shè)置1mil格點(diǎn)。PCB布線線寬01布線首先應(yīng)滿足工廠加工能力,1309瀏覽量 -
基于STM32的300W無刷直流電機(jī)驅(qū)動(dòng)方案2023-07-06 10:02
如何驅(qū)動(dòng)無刷電機(jī)?近些年,由于無刷直流電機(jī)大規(guī)模的研發(fā)和技術(shù)的逐漸成熟,已逐步成為工業(yè)用電機(jī)的發(fā)展主流。圍繞降低生產(chǎn)成本和提高運(yùn)行效率,各大廠商也提供不同型號(hào)的電機(jī)以滿足不同驅(qū)動(dòng)系統(tǒng)的需求。現(xiàn)階段已經(jīng)在紡織、冶金、印刷、自動(dòng)化生產(chǎn)流水線、數(shù)控機(jī)床等工業(yè)生產(chǎn)方面應(yīng)用。無刷直流電機(jī)的優(yōu)點(diǎn)與局限性優(yōu)點(diǎn):高輸出功率、小尺寸和重量、散熱性好、效率高、運(yùn)行速度范圍寬、低717瀏覽量 -
上新啦!開發(fā)板僅需9.9元!2023-06-21 17:43
-
參考設(shè)計(jì) | 2KW AC/DC數(shù)字電源方案2023-06-21 17:43
什么是數(shù)字電源?數(shù)字電源,以數(shù)字信號(hào)處理器(DSP)或微控制器(MCU)為核心,將數(shù)字電源驅(qū)動(dòng)器、PWM控制器等作為控制對(duì)象,能實(shí)現(xiàn)控制、管理和監(jiān)測(cè)功能的電源產(chǎn)品。它是通過設(shè)定開關(guān)電源的內(nèi)部參數(shù)來改變其外特性,并在“電源控制”的基礎(chǔ)上增加了“電源管理”。所謂電源管理是指將電源有效地分配給系統(tǒng)的不同組件,最大限度地降低損耗。數(shù)字電源的管理(如電源排序)必須全部 -
千萬不能小瞧的PCB半孔板2023-06-21 17:34