- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376444 > X80000Q32I (INTERSIL CORP) Smart Power Plug Penta-Power Sequence Controller with Hot Swap PDF資料下載
參數(shù)資料
| 型號： | X80000Q32I |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Smart Power Plug Penta-Power Sequence Controller with Hot Swap |
| 中文描述： | 5-CHANNEL POWER SUPPLY SUPPORT CKT, QCC32 |
| 封裝： | 7 X 7 MM, 0.65 MM PITCH, QFN-32 |
| 文件頁數(shù)： | 21/37頁 |
| 文件大?。?/td> | 695K |
| 代理商： | X80000Q32I |
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頁第20頁當(dāng)前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁
21
FN8148.0
March 18, 2005
operation to control Inrush currents during hot insertion
modes.
Software Slew Rate Control
Users can adjust the slew rate control by using an SMBus
write command to change the slew rate control bits. This
allows adaptation in the case of changing load conditions,
creates a modular design for downstream DC-DC supplies,
and provides control of the load on the hot voltage when
slew rates vs. loads vary.
Gate Capacitor, Filtering and Feedback
In Figure 29, the FET control circuit includes an FET
feedback capacitor C
2
, which provides compensation for the
FET during turn on. The capacitor value depends on the
load, the FET gate current, and the maximum desired inrush
current.
The value of C2 can be selected with the following formula:
Where:
I
GATE
= FET Gate current
I
INRUSH
= Maximum desired inrush current
C
LOAD
= DC/DC bulk capacitance
With the X80000, there is some control of the gate current
with the IGQ pins and IGx bits, so one selection of C2 can
cover a wide range of possible loading conditions. Typical
values for C2 range from 2.2 to 4.7nF.
When power is applied to the system, the FET tries to turn
on due to its internal gate to drain capacitance (Cgd) and the
feedback capacitor C2 (see Figure 29). The X80000 device,
when powered, pulls the gate output low to prevent the gate
voltage from rising and keep the FET from turning on.
However, unless V
DD
powers up very quickly, there will be a
brief period of time during initial application of power when
the X80000 circuits cannot hold the gate low. The use of an
external capacitor (C1) prevents this. Capacitors C1 and C2
form a voltage divider to prevent the gate voltage from rising
above the FET turn on threshold before the X80000 can hold
the gate low. Use the following formula for choosing C1.
Where:
V1 = Maximum input voltage,
V2 = FET threshold Voltage,
C1 = Gate capacitor,
C2 = Feedback capacitor.
In a system where V
DD
rises very fast, a smaller value of C1
may suffice as the X80000 will control voltage at the gate
before the voltage can rise to the FET turn on threshold. The
circuit of Figure 29 assumes that the input voltage can rise to
80V before the X80000 sees operational voltage on V
DD
. If
C1 is used then the series resistor R1 will be required to
prevent high frequency oscillations.
GATE Current Quick Selection
For applications that require different ramp rates during
insertion and start-up and operations modes or those where
the serial interface is not available, the X80000 provides two
SENSE
V
EE
R
SENSE
LOAD
V
DD
=12V
Slew
Rate
Selection
Logic
GATE
10μA
to
160μA
I
INRUSH
DRAIN
100K
Gate Current
Quick Select
Logic
IGQ1
IGQ0
-48V
Control
Registers
SDA
SCL
SMBus
100*
100nF*
* Optional Components
See Section “Gate Capacitor, Filtering and Feedback”
22K
3.3nF
C2
R2
FIGURE 29. PROGRAMMBLE SLEW RATE (INRUSH
CURRENT) CONTROL
C2
I
----------I
C
×
INRUSH
=
TABLE 10. I
GATE
OUTPUT CURRENT OPTIONS
IG3
IG2
IG1
IG0
I
GATE
(
μ
A)
0
0
0
0
10
0
0
0
1
20
0
0
1
0
30
0
0
1
1
40
0
1
0
0
50
Default
0
1
0
1
60
0
1
1
0
70
0
1
1
1
80
1
0
0
0
90
1
0
0
1
100
1
0
1
0
110
1
0
1
1
120
1
1
0
0
130
1
1
0
1
140
1
1
1
0
150
1
1
1
1
160
C1
V1
V2
–
V2
=
X80000, X80001
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X80000 | Smart Power Plug Penta-Power Sequence Controller with Hot Swap |
| X80001 | Smart Power Plug Penta-Power Sequence Controller with Hot Swap |
| X80012Q32I | 14 STR PE BLK RoHS Compliant: Yes |
| X80010Q32I | Penta-Power Sequence Controller with Hot swap and System Management |
| X80013Q32I | Connector Wall Plate; Color:Almond; Leaded Process Compatible:Yes; Contact Termination:IDC; No. of Ports:3 RoHS Compliant: Yes |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X80001 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Smart Power Plug Penta-Power Sequence Controller with Hot Swap |
| X80001Q32I | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Smart Power Plug Penta-Power Sequence Controller with Hot Swap |
| X80010 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Penta-Power Sequence Controller with Hot swap and System Management |
| X80-01-01 | 制造商:MOFLASH SIGNALLING 功能描述:XENON BEACON,AMB,SMALL |
| X80010Q32I | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Penta-Power Sequence Controller with Hot swap and System Management |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。