- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄44 > MCZ34652EFR2 (Freescale Semiconductor)IC HOTSWAP CTRLR 2A NEG 16SOIC Datasheet資料下載
參數(shù)資料
| 型號(hào)： | MCZ34652EFR2 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 20/26頁 |
| 文件大?。?/td> | 1802K |
| 描述： | IC HOTSWAP CTRLR 2A NEG 16SOIC |
| 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： | 2A |
| 電源電壓： | 15 V ~ 80 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC N |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁當(dāng)前第20頁第21頁第22頁第23頁第24頁第25頁第26頁
Analog Integrated Circuit Device Data
20
Freescale Semiconductor
34652
TYPICAL APPLICATIONS
rchived by Freescale Semiconductor, Inc., 2008
Figure 20. External Resistor (R
TIMER
) Value Versus
Start-Up and Retry Delay Timer Value (t
TIMER
)
POWER GOOD OUTPUT SIGNALS
The power good pins PG and PG
are output pins that are
used to directly enable a power module load. The device has
active high and active low power good output signals.
Choosing which power good active signal depends on the
Enable signal requirement of the load. This feature allows the
34652 to adapt to different applications and a wide variety of
loads.
The power good output signal is active if the Power
MOSFET is fully enhanced and the device is in normal
operation. The signal goes active after a typical 20 ms delay.
The signal deactivates if one of the following occurs:
" 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.
When the power good output signal becomes inactive, it
disables the load, protecting it from any faults or damage.
These loads are usually DC/ DC converters, depicted in
Figure 19
, page 18
. An LED can also be connected to PG
to
indicate that the power is good.
The PG and PG
pins are referenced to VIN and require a
pull-up resistor connected to VPWR
(Figures 18
and 19
,
page 18
).
DISABLING AND ENABLING THE 34652
The Disable control input (DISABLE) provides two
functions:
" External enable/disable control.
" Manual resetting of the device and the retry counter after
a fault has occurred.
Using the DISABLE pin, a user can enable /disable the 34652
device, which facilitates easy access to connect the load to or
disconnect it from the main power rail.
When power is first applied, the DISABLE pin must be
inactive in order for the 34652 to initiate a start-up sequence.
If the DISABLE pin is active, the device makes no further
steps until the pin is inactive. If the DISABLE pin is activated
at any point during the start-up and thereafter during normal
operation, then the retry counter resets, the Power MOSFET
turns off, and the power good output signals deactivate. The
DISABLE circuit is equipped with a 1.0 ms filter to filter out
any glitches or transients on the DISABLE input and prevent
the Power MOSFET from turning off prematurely.
The DISABLE pin is referenced to VPWR . If left open or
connected to VPWR, meaning the voltage at the DISABLE
pin is between V
PWR
+ 1.2 V and V
PWR
- 1.2 V, it is inactive
and the device is enabled. If a positive voltage (1.8 V above
V
PWR
) or a negative voltage (1.8 V below V
PWR
) is applied to
DISABLE, it is active and the device is disabled.
CHARGING CURRENT LIMIT
When the device passes the UVLO threshold, it checks if
there is any external resistor or external capacitor connected
to the ICHG
pin. If there is, then it determines the value of the
charging current limit value and the charging current limit rise
time accordingly. If there is not, it uses the default charging
current limit value of 100 mA and rise time of 1.0 ms.
Note Users are allowed to connect an external capacitor
to the ICHG pin only if an external resistor is also connected.
During the external components check, a capacitor produces
an impulse of current and an external resistor will be
detected, even it the external resistor is absent.
When the Power MOSFET is turned on, the current limit is
set gradually from 0 A to I
CHG
. This current charges up the
load capacitor relatively slowly. When the load capacitor is
fully charged, the Power MOSFET reaches its full
enhancement, which triggers the current limit to change from
I
CHG
to I
LIM
and the load current to decrease. The power good
output signals activate after a 20
ms delay, which in turn
enables the load. The 34652 is now in normal operation
mode and the retry counter resets.
0
50
100
150
200
250
300
350
400
450
500
550
0 200 400 600 800 1000 1200
ttimer ms
t
TIMER
(ms)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MCZ34653EFR2 | IC HOTSWAP CTRLR 1A NEG 8-SOIC |
| MCZ34670EG | IC POE CURR MODE SW REG 20-SOIC |
| MIC184BM TR | IC SUPERVISOR LOCAL/REMOTE 8SOIC |
| MIC2086-MBQS TR | IC CTRLR HOW SWAP SGL 20-QSOP |
| MIC2225-4OYMT TR | IC REG DL BUCK/LINEAR 10TMLF |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCZ34652EFR2SCALE | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:2.0 A Negative Voltage Hot Swap Controller with Enhanced Programmability |
| MCZ34653EF | 功能描述:熱插拔功率分布 Hot Swap Controller 1.0 Neg Vltg 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 |
| MCZ34653EF/R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:1.0 A Negative Voltage Hot Swap Controller |
| MCZ34653EFR2 | 功能描述:熱插拔功率分布 Hot Swap Controller 1.0 Neg Vltg 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 | 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。