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參數(shù)資料
| 型號： | ISL6144IV |
| 廠商： | INTERSIL CORP |
| 元件分類： | MOSFETs |
| 英文描述： | High Voltage ORing MOSFET Controller |
| 中文描述： | 2 A BUF OR INV BASED MOSFET DRIVER, PDSO16 |
| 封裝： | PLASTIC, MO-153AB, TSSOP-16 |
| 文件頁數(shù)： | 13/14頁 |
| 文件大?。?/td> | 404K |
| 代理商： | ISL6144IV |
8
High Voltage Pass and Clamp
A high voltage pass and clamping circuit prevents the high
output voltage from damaging the comparators in case of
quick drop in VIN. The comparators are running from the 5V
supply between HVREF and VIN. These devices are rated
for 5V and will be damaged if VOUT is allowed to be present
(as the output is powered from other parallel supplies), and
does not fall when VIN is falling. For example, if VIN falls to
30V, VOUT remains at 48V and the differential Voltage
between the “-” and “+” terminals of the comparator would be
18V, exceeding the rating of the devices and causing
permanent damage to the IC.
Fault Detection Block
The fault detection block has two monitoring circuits (refer to
Figure 4):
1. Gate monitoring detects when the GATE < VIN+0.37V
2. VOUT monitoring detects when VIN-0.41V > VOUT
These two outputs are ORed, inverted, level shifted, and
delayed using an internal filter (TFLT )
The following failures can be detected by the fault detection
circuitry:
1. ORing FET off due to dead short in the sourcing supply,
leading to VIN < VOUT
2. Shorted Terminals of the ORing FET
3. Blown fuse in the power path of the sourcing supply
4. Open Gate terminal
5. HVREF UV
The FAULT pin is not latched off and the pull down will shut
off as soon as the fault is removed and the pin becomes high
impedance. Typically, an external pull-up resistor is
connected to an external voltage source (for example 5V,
3.3V) to pull the pin high, an LED can be used to indicate the
presence of a fault.
Application Considerations
ORing MOSFET Selection
Using an ORing MOSFET instead of an ORing diode results
in increased overall power system efficiency as losses
across the ORing elements are reduced. The use of ORing
MOSFETs becomes more important at higher current levels,
as power loss across the traditionally used ORing diode is
very high. The high power dissipation across these diodes
requires special thermal design precautions such as heat
sinks and forced airflow.
For example, in a 48V, 40A (1+1) redundant system with
current sharing, using a Schottky diode as the ORing
(auctioneering) device (refer to Figure 5), the forward
voltage drop is in the 0.4-0.7V range, let us assume it is
0.5V. Power loss across each diode:
Total power loss across the two ORing diodes is 20W.
If a 5m
single MOSFET per feed is used, the Power loss
across each MOSFET is:
Total power loss across the two ORing MOSFETs is 4W.
In case of failure of current sharing scheme, or failure of
DC/DC #1, the full load will be supplied by DC/DC #2. ORing
FIGURE 4. FAULT DETECTION BLOCK
+
-
+
-
0.41V
0.37V
LEVEL SHIFT
DELAY
120s
FAULT
GATE
VIN
VOUT
+
-
+
-
P
loss D1
()
P
loss D2
()
I
OUT
2
--------------- V
F
20A 0.5V
10W
==
=
FIGURE 5. 1+1 REDUNDANT SYSTEM WITH DIODE ORing
+IN
-IN
PR
PC
+OUT
+S
SC
-S
-OUT
DC/DC
#1
Note 8
Figure 16
Rpb1
CIN1
100F
Cd1
220nF
Ccs1
1nF
DC/DC
#2
Rpb2
Ccs2
1nF
36 TO 75 VDC
INPUT BUS 2
INPUT BUS 1
PRIMARY GROUND
+OUT1 = 48V
10
36 TO 75 VDC
VOUT
(40A)
0.5V@ 20A
D1
D2
SECONDARY
+OUT2 = 48V
Note 8
CIN2
100F
Cd2
220nF
GROUND
+IN
-IN
PR
PC
+OUT
+S
SC
-S
-OUT
Figure 16
P
loss M1
()
P
loss M2
()
I
OUT
2
---------------
2
r
DS ON
()
==
P
loss M1
()
20A
()
2
5m
2W
==
(EQ. 4)
ISL6144
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PDF描述 |
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| ISL6144IVZA | High Voltage ORing MOSFET Controller |
| ISL6410AIU-T | Circular Connector; No. of Contacts:6; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:8; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:8-6 RoHS Compliant: No |
| ISL6410AIU-T5K | Circular Connector; No. of Contacts:13; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:10; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:10-13 RoHS Compliant: No |
| ISL6410AIU-TK | Circular Connector; No. of Contacts:13; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:10; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:10-13 RoHS Compliant: No |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6144IV-T | 功能描述:IC CTRLR MOSFET HV ORING 16TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - O 圈控制器 系列:- 標準包裝:1,000 系列:- 應用:電池備份，工業(yè)/汽車，大電流開關 FET 型:- 輸出數(shù):5 內(nèi)部開關:是 延遲時間 - 開啟:100ns 延遲時間 - 關閉:- 電源電壓:3 V ~ 5.5 V 電流 - 電源:250µA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC N 包裝:帶卷 (TR) |
| ISL6144IVZA | 功能描述:IC CTRLR MOSFET ORING HV 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - O 圈控制器 系列:- 標準包裝:1,000 系列:- 應用:電池備份，工業(yè)/汽車，大電流開關 FET 型:- 輸出數(shù):5 內(nèi)部開關:是 延遲時間 - 開啟:100ns 延遲時間 - 關閉:- 電源電壓:3 V ~ 5.5 V 電流 - 電源:250µA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC N 包裝:帶卷 (TR) |
| ISL6144IVZA-T | 功能描述:IC CTRLR MOSFET HV ORING 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - O 圈控制器 系列:- 標準包裝:1,000 系列:- 應用:電池備份，工業(yè)/汽車，大電流開關 FET 型:- 輸出數(shù):5 內(nèi)部開關:是 延遲時間 - 開啟:100ns 延遲時間 - 關閉:- 電源電壓:3 V ~ 5.5 V 電流 - 電源:250µA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC N 包裝:帶卷 (TR) |
| ISL6144IVZA-T7A | 功能描述:熱插拔功率分布 W/ANNEAL 16LD TSSOP ORING FET CONTRLR 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: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| ISL6146 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Low Voltage ORing FET Controller |
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