参数资料
型号: ISL6144IVZA-T
厂商: Intersil
文件页数: 10/30页
文件大小: 0K
描述: IC CTRLR MOSFET HV ORING 16TSSOP
标准包装: 2,500
应用: 电信/数据通信系统
FET 型: N 沟道
输出数: 1
内部开关:
延迟时间 - 开启: 1ms
延迟时间 - 关闭: 250ns
电源电压: 9 V ~ 75 V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 带卷 (TR)
ISL6144
Q 1
The duration of the reverse current pulse is a few hundred
nanoseconds and is normally kept well below current rating
of the ORing MOSFET.
Reducing the value of V TH(HS) results in lower reverse
current amplitude and reduces transients on the common
bus output voltage.
HVREF and COMP Capacitor Values
HVREF CAPACITOR (C1)
this capacitor is necessary to stabilize the HV REF(VZ) supply
and a value of 150nF is sufficient. Increasing this value will
result in gate turn-on time increase.
COMP CAPACITOR (C2)
Placed between V OUT and COMP pins to provide filtering
and decoupling. A 10nF capacitor is adequate for most
Protecting VIN and VOUT from High dv/dt Events
In hot swap applications lacking adequate VIN and VOUT
bulk capacitance and where the ISL6144 is directly
connected to a prebiased bus exposing either the VIN or
VOUT pins directly to high dv/dt transients, these pins must
be filtered to prevent catastrophic damage caused by the
high dv/dt transients. A simple RC filter using a pin 2 series
resistor, of 10 -100 Ω and the 100nF or greater best design
practices decoupling capacitor to ground. This will provide a
>1μs rise time on the VIN pin to protect it. A resistor of ~3.3
times the value should be added in series with the VOUT pin
to reduce the introduced HS Vth error.
Alternately, the programmed HS Vth can be adjusted upward
by the voltage across R VIN as described on page 9.
Hot Swapped
Input
cases.
R in
10-100
R out
~3.3X R in
2
VIN
VOUT
16
C 1 >
100nF
3
8
HVREF
GND
COMP
ISL6144
VSET
15
14
10
FN9131.7
October 6, 2011
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