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參數(shù)資料
| 型號： | MCZ34653EFR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 14/24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
14
Freescale Semiconductor
34653
FUNCTIONAL DEVICE OPERATION
PROTECTION AND DIAGNOSIS FEATURES
rchived by Freescale Semiconductor, Inc., 2008
PROTECTION AND DIAGNOSIS FEATURES
UNDERVOLTAGE
When the input voltage drops below the undervoltage
falling threshold for more than 1.0 ms, an undervoltage fault
is detected and one of the start-up conditions (list on
page
10
) is violated. The 34653 turns off the Power MOSFET
and deactivates the power good output signals, disabling the
load (Point A in Figure 14
). The 34653 stays in this state until
the input voltage rises above the undervoltage rising
threshold for more than 1.0 ms, signaling that the supply
voltage is in the normal operation range (Point B in
Figure 14
). Then a new start-up sequence initiates as
described on page
10
. The undervoltage detection circuit is
also equipped with a 1.0 V hysteresis.
Figure 14. Undervoltage Fault Followed by a
New Start-Up Sequence
Figure 15
shows how the 34653 uses the start-up timer to
make sure that the input voltage is above the undervoltage
falling threshold. The 34653 was in normal operation before
Point A. At Point A an undervoltage fault occurs. Then the
fault is cleared at Point B, and the 34653 initiates a start-up
sequence. Before the end of the start-up timer another
undervoltage fault occurs at Point C, so the 34653 does not
turn on the Power MOSFET. At Point D the fault is cleared
again for the length of the start-up timer and the 34653 turns
on the Power MOSFET and starts the charging process (refer
to Charging Process
, pages 1011).
Figure 15. Start-Up Timer Protection Against
Undervoltage Faults
OVERVOLTAGE
When the input voltage exceeds the overvoltage rising
threshold for more than 1.0 ms, an overvoltage fault is
detected and one of the start-up conditions (list on page
10
)
is violated. The 34653 turns off the Power MOSFET and
deactivates the power good output signals, disabling the
load. The 34653 stays in this state until the input voltage falls
below the overvoltage falling threshold for more than 1.0
ms,
signaling that the supply voltage is in the normal operation
range. Then a new start-up sequence initiates as described
on page
10
. The overvoltage detection circuit is also
equipped with a 2.0 V hysteresis.
The waveforms for an overvoltage fault are shown in
Figure 16
.
Figure 16. Overvoltage Fault
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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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