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参数资料
| 型号： | ISL6160EVAL2 |
| 厂商： | Intersil |
| 文件页数： | 4/7页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR ISL6160/HIP6006 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 5V |
| 电流 - 输出： | 3.5A |
| 输入电压： | 5V，12V |
| 稳压器拓扑结构： | 降压 |
| 板类型： | 完全填充 |
| 已供物品： | 2 个板 |
| 已用 IC / 零件： | HIP6006，ISL6160 |
Application Note AN9959
HIP6006 current limits it to 5A. When the Secondary Rail
voltage decreases to 10V(TP1) the ISL6160 deasserts the
DC-DC_EN pin (TP2) and shuts off the converter. The 1.6ms
delay prevent spurious events from latching off the power
supply.
RFP45N06’s gain in switching losses offsets its decreased
conduction losses at load currents up to about 9A. This data
reinforces the need to consider both switching and
conduction losses of the MOSFETs. This data is taken from
the HIP6006EVAL1 platform.
IOUT (1A/DIV)
90
VB SECONDARY RAIL (5V/DIV)
85
V B PRIMARY RAIL 5V/DI V
80
RFP25N05
RFP45N06
75
5V VOUT (5V/DIV )
DC-DC_EN (5V/DIV)
2
4 6
8
10
LOAD CURRENT (A)
TIME (0.4ms/DIV)
FIGURE 10. HIP6006EVAL1 EFFICIENCY WITH EITHER
V OUT = V R EF ? ? 1 + -------- ? , where
FIGURE 9. ISL6160EVAL2 OVER-CURRENT OPERATION
Power Supply Design Considerations
The concept of the power supply demonstrated by the
ISL6160EVAL2 can be scaled across the entire range of
1.3V to 12V of output voltage up to a 50W port power level.
To encompass this entire range there are several component
variables and trade-offs to consider. These variables and
trade-offs are briefly discussed in this document, but for a
more detailed and extensive explanation please refer to the
several listed documents [2], [4], [5] on page 5.
Input Capacitor Selection
Use a mix of HIP6006 input (VB secondary rail) bypass
capacitors to control the voltage overshoot across the
MOSFETs. Use small ceramic capacitors for high frequency
decoupling and bulk capacitors to supply the current needed
each time Q1 turns on. The number of input capacitors and
their capacitance are usually determined by their maximum
RMS current rating. A conservative approach is to determine
the converter maximum input RMS current, and assume it
would all have to be supplied from the input capacitors. By
providing enough capacitors to meet the required RMS
current rating, one usually provides enough capacitance for
proper power de-coupling.
MOSFET Selection Effect on Efficiency [4]
This section shows graphically that a larger, lower RDSon)
MOSFET does not always improve converter efficiency.
Figure 10 shows that smaller RFP25N05 MOSFETs are
more efficient over most of the line and load range than
larger RFP45N06 MOSFETs. The RFP25N05 has a r DS(ON)
of 47m ? (maximum at 25 o C) versus 28m ? for the
RFP45N06. In comparison to the RFP25N05, the
4
RFP25N05 OR RFP45N06 MOSFETs
Setting the Output Voltage
Simple resistor value changes allow for outputs as low as
1.3V or as high as the 12V input voltage. The steady-state
DC output voltage can be set using the following simple
formula:
R8
? R5 ?
V OUT = desired DC output voltage of the converter
V REF = HIP6006 internal reference voltage (typically 1.27V)
Output Capacitor Selection
Output capacitors are required to filter the output and supply
the load transient current. The filtering requirements are a
function of the switching frequency and the ripple current.
The load transient requirements are a function of the slew
rate (di/dt) and the magnitude of the transient load current.
These requirements are generally met with a mix of
capacitors and careful layout. As with the input capacitors,
the number of output capacitors is determined by a
parameter different than sheer capacitance. Based on the
desired output ripple and output transient response, a
maximum ESR can be determined. Based on the design’s
dimensional restraints, an optimum compromise between
the number and size of the output capacitors can be
reached. Conservative approaches dictate using the data
book’s maximum values for ESR; this way the design will still
meet the initial criteria even at the end of capacitor’s active
life. High frequency decoupling of the output may not be
implemented if the application provides high frequency
decoupling components at the load end of the output. In
applications requiring good high frequency decoupling, the
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6160IB | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:InfiniBand +12V Bulk and +5V Auxiliary Power Controller |
| ISL6160IB-T | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:InfiniBand +12V Bulk and +5V Auxiliary Power Controller |
| ISL6161 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual Power Distribution Controller |
| ISL6161CB | 功能描述:IC CTRLR PWR DISTRIB DUAL 14SOIC 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 |
| ISL6161CB-T | 功能描述:IC CTRLR PWR DISTRIB DUAL 14SOIC 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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