參數(shù)資料
型號(hào)： MAX5953DUTM+
廠商： Maxim Integrated
文件頁(yè)數(shù)： 10/27頁(yè)
文件大小： 371K
描述： IC INTERFACE 802.3AF 48TQFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 43
類型： 以太網(wǎng)供電開(kāi)關(guān)（PoE）
應(yīng)用： 遠(yuǎn)程外設(shè)（工業(yè)控制，相機(jī)，數(shù)據(jù)訪問(wèn)）
內(nèi)部開(kāi)關(guān)： 是
電源電壓： 11 V ~ 76 V
工作溫度： 0°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 48-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 48-TQFN-EP（7x7）
包裝： 管件
IEEE 802.3af PD Interface and PWM Controllers
with Integrated Power MOSFETs
10   ______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1, 2, 3, 5, 7, 12, 13, 14, 17,
19, 35, 38, 46, 47, 48
N.C.
No Connection. Not internally connected. Make no electrical connection to these pins.
4
V+
Positive Input Power. Referenced to V
EE
.
6
MAX
A MAX
UVLO
Undervoltage Lockout Programming Input for PD Interface. UVLO is referenced to V
EE
.
When UVLO is above its threshold, the device enters the power mode. Connect UVLO to
V
EE
 to use the default undervoltage lockout threshold. Connect UVLO to the center of an
external resistor-divider between V+ and V
EE
 to define a threshold externally. The series
resistance value of the external resistors must add to 25.5k& (?%) and replaces the
detection resistor. To keep the device in undervoltage lockout, drive UVLO between
V
TH,G,UVLO
 and V
REF,UVLO
.
6
MAX
B MAX
D
N.C.
No Connection. Not internally connected. Make no electrical connection to this pin.
8
RCLASS
Classification Setting for PD Interface. RCLASS is referenced to V
EE
. Add a resistor from
RCLASS to V
EE
 to set a PD class (see Tables 1 and 2).
9
GATE
Gate of Internal Isolation n-Channel Power MOSFET. GATE is referenced to V
EE
. GATE
sources 10礎(chǔ) when the device enters power mode. Connect an external 100V ceramic
capacitor from GATE to OUT to program the inrush current. Drive GATE to V
EE
 to turn off
the internal MOSFET. The detection and classification functions operate normally when
GATE is driven to V
EE
.
10, 11
V
EE
Negative Input Power. Source of the integrated isolation n-channel power MOSFET.
15, 16
OUT
Output Voltage. OUT is referenced to V
EE
. OUT is connected to the drain of the integrated
isolation n-channel power MOSFET. Connect OUT to GND.
18
MAX
A MAX
B
PGOOD
Active-High, Open-Drain Power-Good Indicator Output for PD Interface. PGOOD is
referenced to OUT. PGOOD goes high impedance when V
OUT
 is within 1.2V of V
EE
 and
when V
GATE
 is 5V above V
EE
. Otherwise, PGOOD is internally pulled to OUT (given that
V
OUT
 is at least 5V below V+). PGOOD can be connected directly to CSS or DCUVLO to
enable/disable the DC-DC converter.
18
MAX
MAX
D
PGOOD
Active-Low, Open-Drain Power-Good Indicator Output for PD Interface. PGOOD is
referenced to V
EE
. PGOOD is pulled to V
EE
 when V
OUT
 is within 1.2V of V
EE
 and when
V
GATE
 is 5V above V
EE
. Otherwise, PGOOD goes high impedance.
20
CS
Current-Sense Input for PWM Controller. CS is referenced to PGND. The current-limit
threshold is internally set to 156mV relative to PGND. The device has an internal noise filter.
If necessary, connect an external RC filter from CS to PGND for additional filtering.
21
PPWM
PWM Pulse Output. Referenced to GND. PPWM leads the internal power MOSFET pulse by
approximately 100ns.
22
GND
Signal Ground of PWM Controller. Connect GND to PGND.
23
PGND
Power Ground of the DC-DC Converter Power Stage. Connect PGND to GND.
24
CSS
Soft-Start Timing Capacitor Connection for PWM Controller. CSS is referenced to GND.
Connect a 0.01礔 or greater ceramic capacitor from CSS to GND. Connect to PGOOD to
automatically enable the PWM controller from the PD interface.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX5953DUTM+ 功能描述:電壓模式 PWM 控制器 IEEE 802.3af PD Int & PWM Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
MAX5953DUTM+T 功能描述:電壓模式 PWM 控制器 IEEE 802.3af PD Int & PWM Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開(kāi)關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
MAX5954AETX+ 功能描述:熱插拔功率分布 Single PCIe Hot Plug Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5954AETX+T 功能描述:熱插拔功率分布 Single PCIe Hot Plug Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5954LETX+ 功能描述:熱插拔功率分布 Single PCIe Hot Plug Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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