参数资料
| 型号： | HIP1011EVAL1 |
| 厂商： | Intersil |
| 文件页数： | 2/5页 |
| 文件大小： | 0K |
| 描述： | PCI HOT PLUG EVALUATION BOARD |
| 标准包装： | 1 |
| 主要目的： | 电源管理，热交换控制器 |
| 已用 IC / 零件： | HIP1011 |
| 已供物品： | 板 |
Application Note 9737
Customizing and Optimizing Circuit
Performance
How is the HIP1011 turned on and off?
In a PCI Hot Plug environment the voltages on each individual
system slot are controlled by a microprocessor and Hot Plug
operating software thus controlling the HIP1011. Reference
PCI Hot Plug spec for details. The HIP1011 is designed to
turn on, when PWRON (pin 9) voltage >2.1V up to 7.0V and to
turn off when <0.8V, making this device controllable using 3V
or 5V logic on the dedicated control signal, PWRON.
I keep getting random false fault indications even
at low current levels, what should I do? How do I
improve noise immunity?
To prevent spurious faults in a noisy electrical environment
connect a ≤ 200pF capacitor between FLTN pin and GND to
provide the necessary ?ltering.
I need to monitor and report the presence of the
-12V supply. How do I do that?
With the addition of a small number of external components
the monitoring and reporting of the -12V status is possible.
In Figure 3 as an example, the M12PG node voltage will be
+5V when the -12V supply is out of speci?cation. The
addition of C GS allows for a programmable delay in setting
M12PG node high. The choice of component values
determines the UV signal level.
+5V
M12PG
C GS
Dz
The 3.3V and 5V over current trip points depend on both
R OCSET and the value chosen for each sense resistor.
Over current design guidelines and recommendations are as
follows:
1. For PCI applications, set R OCSET to 6.04k ? , and use
5m ? 1% sense resistors (see Figure 2).
2. For non PCI applications, the following precautions and
limitations apply:
A. Do not exceed the maximum power of the integrated
NMOS and PMOS. High power dissipation must be coupled
with effective thermal management. The integrated PMOS
has an r DS(ON) of 0.3 ? . Thus, with 1A of load current the
power dissipation is 0.3W. The thermal impedance of the
package is 100 degrees per watt, limiting the average DC
current on the 12V supply to about 1.5A and imposing an
upper limit on the R OCSET resistor. Do not use an R OCSET
resistor greater than 15k ? .
The average current on the -12V supply is only limited by
electromigration. The average current should not exceed
0.7A. Since the thermal restrictions on the +12V supply are
more severe, the +12V supply restricts the use of the HIP1011
to applications where the ± 12V supplies draw relatively little
current. Since both supplies only have one degree of freedom,
the value of R OCSET , the flexibility of programming is quite
limited. See the HIP1011B data sheet.
B. Do not try to sense voltages across the two external sense
resistors that are less than 33mV. Spurious faults due to noise
and comparator input sensitivity may result. The minimum
R OCSET value is 6k ? . This will set the 3.3V comparator
threshold at 45mV and at 35mV for the 5V comparator. This is
the voltage level at which the OC fault (I OUT x R SENSE ) will
occur.
-12V
FIGURE 3.
C. Minimize V RSENSE loss so as to not significantly reduce the
voltage delivered to the adapter card. Remember PCB trace
and connector losses also need to be considered. Make sure
How does the over current set function work, how
do I design for different (non PCI) OC limits, and
what considerations are there? (See Table 1 for
reference.)
The HIP1011 allows easy custom programming of the over
current (OC) levels of all 4 supplies by simply changing the
resistor value between OCSET, (pin 8), and ground. The
R OCSET value and the OCSET 100 μ A current source set a
voltage that is used in 4 comparators, one for each supply.
The voltages developed across the 3.3V and 5V sense
resistors are applied to the inputs of their respective
comparators. The +12V and -12V currents are sensed
internally with pilot devices. Once any comparator trips, that
output is fed through logic circuits resulting in the FLTN, pin
2, going low, indicating a fault condition. Because of the
internal current monitoring of the +12V and -12V switches,
their programming ?exibility is limited to R OCSET changes.
2
that the R SENSE resistor can handle the power. For best results
use a precision resistor with a low temperature coefficient.
D. Minimize external FET r DS(ON) . Two ITF86130
MOSFETs in parallel are recommended.
EXAMPLES:
Two design examples focusing on different critical
requirements are offered below.
Example 1: PCI Applications.
Figure 2 meets all PCI speci?cations for slew rate and over
current protection.
Example 2: Custom over current levels.
1. Choose ROCSET to give acceptable over current trip
points for the ± 12V supplies. For repeatable results,
Rocset must be greater than 6k ? . For reliability, ROCSET
must be less than 15k ? . These two over current levels
相关PDF资料 |
PDF描述 |
|---|---|
| HIP1011EVAL2 | EVAL BOARD COMPACT PCI HOT PLUG |
| HIP1012EVAL1 | EVALUATION BOARD DUAL GENERIC |
| HIP1013EVAL1 | EVALUATION BOARD DUAL GENERIC |
| HIP2100EVAL2 | EVAL BOARD 48VDC-5UDC CONVERTER |
| HIP2100EVAL | EVAL BOARD MINI HALF BRIDGE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HIP1011EVAL2 | 功能描述:电源管理IC开发工具 COMPACT PCI HOT SWAP EVALUATION BRD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| HIP1012 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual Power Distribution Controller |
| HIP1012A | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual Power Distribution Controller |
| HIP1012A_04 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual Power Distribution Controller |
| HIP1012ACB | 功能描述:IC CTRLRL HOT PLUG DUAL 14-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
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