參數(shù)資料
型號： X80001Q32I
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)： 16/37頁
文件大小： 695K
代理商： X80001Q32I
16
FN8148.0
March 18, 2005
Functional Description
Hot Circuit Insertion
When circuit boards are inserted into a live backplane, the
bypass capacitors at the input of the board’s power module
or DC/DC converter can draw huge transient currents as
they charge up (See Figure 22). This transient current can
cause permanent damage to the board’s components and
cause transients on the system power supply.
The X80000 is designed to turn on a board’s supply voltage
in a controlled manner (see Figure 23), allowing the board to
be safely inserted or removed from a live backplane. The
device also provides undervoltage, overvoltage and
overcurrent protection while keeping the power module (DC-
DC converter) off until the backplane input voltage is stable
and within tolerance.
20
V1GOOD
V1 Voltage Good Output (Active Low).
This open drain output goes LOW when EN1 is less than V
TRIP1
and goes
HIGH when EN1 is greater than V
TRIP1
. There is a user selectable delay circuitry on this pin.
21
RESET
RESET Output.
This open drain pin is an active LOW output. This pin will be active until PWRGD goes active and
the power sequencing is complete. This pin will be released after a programmable delay.
22
WP
Write Protect. Input Pin.
WP HIGH (in conjunction with WPEN bit=1) prevents writes to any memory
location in the device. It has an internal pulldown resistor. (>10M
typical)
23
MRC
Manual Reset Input Cold-side.
Pulling the MRC pin HIGH initiates a system side RESET. The MRC signal must
be held HIGH for 5
μ
secs. It has an internal pulldown resistor. (>10M
typical)
24
NC
No Connect.
No internal connections.
25
V
EE
NC
Negative Supply Voltage Input.
26
No Connect.
No internal connections.
27
FAR
Failure After Re-try (FAR)
output signal. Failure After Re-try (FAR) is asserted after a number of retries. Used for
Overcurrent and hardshort detection.
28
BATT-ON
Battery On Input
. This input signals that the battery backup (or secondary supply) is supplying power to the
backplane. It has an internal pulldown resistor. (>10M
typical)
29
PWRGD
Power Good Output.
This output pin enables a power module.
30
IGQ1
Gate Current Quick Select Bit 1 Input.
This pin is used to change the gate current drive and is intended to allow
for current ramp rate control of the gate pin of an external FET. It has an internal pulldown resistor. (>10M
typical)
31
IGQ0
Gate Current Quick Select Bit 0 Input.
This pin is used to change the gate current drive and is intended to allow
for current ramp rate control of the gate pin of an external FET. It has an internal pulldown resistor. (>10M
typical)
32
MRH
Manual Reset Input Hot-side.
Pulling the MRH pin LOW initiates a GATE pin reset (GATE pin pulled LOW). The
MRH signal must be held LOW for 5
μ
secs (minimum).
Pin Descriptions
(Continued)
PIN
NAME
DESCRIPTION
V
DD
X80000
X80001
V
UV/OV
OV=71V
V
EE
SENSE
DRAIN
-48V
Return
UV=37V
-48V
GATE
Rs
0.02
5%
R4
182K
1%
R5
30k
1%
R6
10K
1%
Q1IRFR120
100K
-48V
DC/DC
Converter
DC/DC
Converter
I
inrush
0.1μF
100
4.7K
3.3n
FIGURE 22. TYPICAL -48V HOTSWAP APPLICATION CIRCUIT
V
GATE
V
FET_DRAIN
PWRGD
I
INRUSH
FIGURE 23. TYPICAL INRUSH WITH GATE SLEW RATE
CONTROL
X80000, X80001
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