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參數(shù)資料
| 型號： | MCZ34653EFR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 8/24頁 |
| 文件大小： | 1649K |
| 描述： | IC HOTSWAP CTRLR 1A NEG 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 熱交換開關(guān) |
| 應(yīng)用： | 通用 |
| 內(nèi)部開關(guān)： | 是 |
| 電流限制： | 1A |
| 電源電壓： | 36 V ~ 80 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOICN |
| 包裝： | 帶卷 (TR) |
Analog Integrated Circuit Device Data
8
Freescale Semiconductor
34653
FUNCTIONAL DESCRIPTION
INTRODUCTION
rchived by Freescale Semiconductor, Inc., 2008
FUNCTIONAL DESCRIPTION
INTRODUCTION
Most telecom and data transfer networks require that
circuit boards be inserted and removed from the system
without powering down the entire system. When a circuit
board is inserted into or removed from a live backplane, the
filter or bypass capacitors at the input of the boards power
module or switching power supply can cause large transient
currents when being charged or discharged. These currents
can cause severe and permanent damage to the boards, thus
making the system unstable. Figure 4
displays the inrush
current to the filter capacitor if a hot swap device is absent.
The inrush current reached an unsafe value of more than
55 A.
Figure 4. Circuit Board Insertion Without a
Hot Swap Device, Inrush Current Not Limited
The 34653 is an integrated negative voltage hot swap
controller with an internal Power MOSFET. The 34653
resides on the plug-in boards and allows the boards to be
safely inserted or removed by powering up the supply
voltages in a controlled manner and regulating the inrush
current to a user-programmable limit, thus allowing the
system to safely stabilize (see Figure 5
). The 34653 provides
protection against overcurrent, undervoltage, overvoltage,
and overtemperature. Furthermore, it protects the system
from short circuits.
Figure 5. Circuit Board Insertion With the Hot Swap
Device, Inrush Current Limited
By integrating the control circuitry and the Power MOSFET
switch into a space-efficient package, the 34653 offers a
complete, cost-effective, and simple solution that takes much
less board space than a similar part with an external Power
MOSFET requires.
The 34653 can be used in - 48 V telecom and networking
systems, servers, electronic circuit breakers, - 48 V
distributed power systems, negative power supply control,
and central office switching.
FUNCTIONAL PIN DESCRIPTION
NEGATIVE SUPPLY INPUT VOLTAGE (VIN)
This is the most negative power supply input. All pins
except DISABLE, PG, and PG
are referenced to this input.
POWER GOOD OUTPUT (ACTIVE HIGH) (PG)
The PG pin is the active high power good output signal that
is used to enable or disable a load. This signal goes active
after a successful power-up sequence and stays active as
long as the device is in normal operation and is not
experiencing any faults.
The signal is deactivated under the following conditions:
" Power is turned off.
" The device is disabled for more than 1.0 ms.
" The device exceeded its thermal shutdown threshold for
more than 12 約.
" The device is in overvoltage or undervoltage mode for
more than 1.0 ms.
" Load current exceeded the overcurrent limit for more than
3.0 ms.
This pin is referenced to VIN.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCZ34670EG | 功能描述:熱插拔功率分布 POWER OVER ETHERNET 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 |
| MCZ34670EG/R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:IEEE 802.3af PD With Current Mode Switching Regulator |
| MCZ34670EGR2 | 功能描述:熱插拔功率分布 POWER OVER ETHERNET 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 |
| MCZ34701EW | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.5A Sw-Mode Power Supply w/Linear Reg RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MCZ34701EWR2 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.5A Sw-Mode Power Supply w/Linear Reg RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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