參數資料
型號： MCZ34652EF
廠商： 飛思卡爾半導體(中國)有限公司
元件分類： 基準電壓源/電流源
英文描述： 2.0 A Negative Voltage Hot Swap Controller with Enhanced Programmability
中文描述： 2.0負電壓熱插拔控制器與可編程性增強
文件頁數： 15/26頁
文件大?。?/td> 647K
代理商： MCZ34652EF
Analog Integrated Circuit Device Data
Freescale Semiconductor
15
34652
FUNCTIONAL DEVICE OPERATION
PROTECTION FEATURES
BOARD REMOVAL
When the board is removed, its power ramps down. As
soon as the 34652’s input voltage reaches the undervoltage
turn-off threshold, the undervoltage detection circuit activates
and the Power MOSFET turns off for having violated one of
the start-up conditions (list on
page 12
).
34652 STATE MACHINE DIAGRAM
Figure 13
is a representation of the 34652 behavior in
different modes of operation.
Figure 13. State Diagram
PROTECTION FEATURES
UNDERVOLTAGE
When the voltage on the UV pin 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 12
)
is violated. The 34652 turns off
the Power MOSFET and deactivates the power good output
signals, disabling the load (Point A in
Figure 14
). The 34652
stays in this state until the voltage on the UV pin 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 12
. The undervoltage
detection circuit is also equipped with a 1.0 V hysteresis
when in default mode. The hysteresis value depends on the
undervoltage detection threshold and can be calculated as
follows:
V
UVHY
= V
UV (
RISING
)
*
[1 - (1.3 V -
V
UVCHY
) / 1.3 V ]
Figure 14. Undervoltage Fault Followed by a
New Start-Up Sequence
MOSFET
→
OFF
PG = 0
Undervoltage
MOSFET
→
OFF
PG = 0
N = 0
Power Off
Temp < 135°C
Filter = 12
μ
s
V
PWR
< V
UVLOF
Filter = 1.0 ms
A signal “set” is generated to check
resistors on UV, ILIM, ICHG, and
TIMER pins and 128
μ
s later
the OV pin
Retry Fault
STOP
Toggle DISABLE
or cycle Power Off
then On to clear fault
Power
Good Check
If I
LOAD
< I
LIM
and V
DS
< 500 mV
for 20 ms
Charging Mode
N
≤
10
Turn Off
MOSFET
→
OFF
PG = 0
PG = 1
N = 0
V
> V
Filter = 1.0 ms
Filter = 3.0 ms
I
LOAD
> I
LIM
for 100
μ
s
I
LOAD
< I
LIM
- I
LIMHY
Short Circuit
Detection
Fast Gate Discharge
< 10
μ
s
I
LOAD
> I
SHORT
Overcurrent
for > 3.0 ms
Pass PG
Check
Fail PG
Check
N
>
10
V
PWR
<
V
UV(OFF)
Filter = 1.0 ms
MOSFET
→
OFF
PG = 0
Overvoltage
V
< V
Filter = 1.0 ms
V
PWR
>
V
OV(OFF)
Filter = 1.0 ms
PG = 0
MOSFET
→
OFF
Temp
>
160°C
Filter = 12
μ
s
Thermal
Shutdown
Ext. Resistor Check
POR is generated
MOSFET
→
OFF
PG = 0
N = 0
DISABLE
POR is generated
DISABLE = 1
Filter = 1.0 ms
DISABLE = 0
Filter = 1.0 ms
V
> V
Filter = 1.0 ms
Overcurrent Mode
Normal Operation
V
DS
< 500 mV
Start-Up
Conditions
Thermal Shutdown < 160°C
DISABLE = 0
Filter = t
TIMER
V
PWR
> V
UV(OFF)
V
PWR
< V
OV(OFF)
N = N + 1
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相關代理商/技術參數
參數描述
MCZ34652EFR2 功能描述:熱插拔功率分布 Hot Swap Controllor 2.0 Neg Vltg RoHS:否 制造商:Texas Instruments 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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