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Datasheet HV100K5-G PDF ( 特性, スペック, ピン接続図 )

部品番号 HV100K5-G
部品説明 Inrush Current Limiter Controllers
メーカ Supertex
ロゴ Supertex ロゴ 
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HV100K5-G Datasheet, HV100K5-G PDF,ピン配置, 機能
Supertex inc.
HV100
3-Pin Hotswap, Inrush Current Limiter Controllers
(Negative Supply Rail)
Features
►Pass element is only external part
►No sense resistor required
►Auto-adapt to pass element
►Short circuit protection
►UV & POR supervisory circuits
►2.5s auto retry
►±10V to ±72V input voltage range
►0.6mA typical operating supply current
►Built in clamp for AC path turn-on glitch
Applications
►-48V central office switching (line cards)
+48V server networks
+48V storage area networks
+48V peripherals, routers, switches
+24V cellular and fixed wireless (bay stations,
line cards)
►+24V industrial systems
►+24V UPS systems
-48V PBX & ADSL systems (line cards)
Distributed power systems
Powered ethernet for VoIP
General Description
The HV100 is a 3-pin hotswap controller available in the
SOT-223 package, which requires no external components
other than a pass element.
The HV100 contains many of the features found in hotswap
controllers with 8 pins or more, and which generally require
many external components. These features include undervolt-
age (UV) detection circuits, power on reset (POR) supervisory
circuits, inrush current limiting, short circuit protection, and
auto-retry. In addition, the HV100 uses a patent pending
mechanism to sample and adapt to any pass element, result-
ing in consistent hotswap profiles without any programming.
Typical Application Circuit
GND
VPP
GATE
VNN
400µF
DC/DC
Converter
+5.0V
COM
HV100
-48V
IRF530
Doc.# DSFP-HV100
B060513
Supertex inc.
www.supertex.com

1 Page



HV100K5-G pdf, ピン配列
HV100
DC Electrical Characteristics (cont.)
Sym Parameter
Min
Example Electrical Results (Using IRF530)
ILIM Max inrush current during hotswap
-
ILIM Max inrush current during hotswap
-
ILIM Max inrush current during hotswap
-
ISHORT Max current Into a short
-
tSHORT
ΔGATE
tHS
Shorted load detect time
Initial rate of rise of GATE
Hotswap period to full GATE value
-
-
-
Typ
1.4
2.5
3.1
4.0
1.0
2.5
12.5
Max
-
-
-
-
-
-
Units Conditions
A
A
A
A
ms
V/ms
ms
IRF530 external MOSFET,
CLOAD = 100μF
IRF530 external MOSFET,
CLOAD = 200μF
IRF530 external MOSFET,
CLOAD = 300μF
IRF530 external MOSFET,
RLOAD = <<1.0
IRF530 external MOSFET,
RLOAD = <<1.0
IRF530 external MOSFET, any CLOAD
IRF530 external MOSFET, any CLOAD
Typical Waveforms
Doc.# DSFP-HV100
B060513
Supertex inc.
3 www.supertex.com


3Pages


HV100K5-G 電子部品, 半導体
HV100
For most applications and pass elements, the HV100 provides
adequate limiting of the maximum current to prevent damage
without the need for any external components. The 2.5s delay
of the auto-retry circuit provides time for the pass element to
cool between attempts.
Auto-Retry
Not only does the HV100 provide short circuit protection in a
3-pin package, they also includes a 2.5s built in auto-restart
timer. The HV100 will continuously try to turn on the system
every 2.5s, providing sufficient time for the pass element to
cool down after each attempt.
This is a surprisingly consistent result because for most
MOSFETs of a particular type the ratio of CISS / CRSS is rela-
tively constant (though notice from the plot that there is some
variation) even while the absolute value of these and other
quantities vary. Based on this, the inrush current will vary
primarily with CLOAD. This makes designing with the HV100
particularly easy because once the pass element is chosen,
the period is fixed and the inrush varies with CLOAD only.
Programming the HV100
The HV100 requires no external components other than a
pass element to provide the functionality described thus far.
In some applications it may be useful to use external compo-
nents to adjust the maximum allowable inrush current, adjust
UVLO, or to provide additional GATE clamping if the supply
rails have rise times below 1.0ms.
All of the above are possible with a minimum number of ex-
ternal components.
i) To adjust inrush current with an external component
simply connect a capacitor (CFB) from drain to GATE of
the MOSFET. The inrush calculation then becomes:
IINRUSH(PEAK) = (CFB + CISS)/(CRSS + CFB) * 2.5e3 * CLOAD
Calculating Inrush Current
As can be seen in the diagram below, for a standard pass
element, the HV100 will normalize the hotswap time period
against load capacitance. For this reason the current limit will
increase with increasing value of the load capacitance.
Note that a resistor (approximately 10KΩ) needs to be
added in series with CFB to create a zero in the feedback
loop and limit the spurious turn on which is now enhanced
by the larger divider element.
ii) To increase undervoltage lockout simply connect a Zener
diode in series with the VPP pin.
iii) If the VPP rises particularly fast (>48e6V/s) then it may be
desirable to connect a capacitor from GATE to source
of the MOSFET to provide a path for the power applica-
tion transient spike, which is now too fast for the internal
clamping mechanism.
iv) To limit the peak current during a short circuit, a resistor
in series with the source of the MOSFET may help.
Inrush can be calculated from the following formula:
IINRUSH(PEAK) = (CISS / CRSS) * 2.5e3 * CLOAD
Doc.# DSFP-HV100
B060513
Supertex inc.
6 www.supertex.com

6 Page





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