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参数资料
| 型号： | ISL6160EVAL2 |
| 厂商： | Intersil |
| 文件页数： | 3/7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
This lower limit is based on the achieved efficiency of the
down stream converter design and the max. power capability
5V
V OUT
(1V/DIV)
V OUT
of that converter output. At point of failure, by providing a
lower current regulation limit on the I/O module the risk of
passing through any rail voltage disruptions is reduced or
5V
(200mV/DIV)
I LOAD
eliminated by not having to rely on the overhead capacity of
the chassis supply.
HIP6006 OC Protection
The HIP6006 has a loss less overcurrent (OC) protection
feature. This is accomplished via the current-sense function
0A
(2A/DIV)
of the HIP600x family. The HIP6006 senses converter load
current by monitoring the drop across the upper MOSFET
(Q2a in the Figure 11 schematic) enhancing the converter ’s
TIME (40us/DIV)
FIGURE 7. ISL6160EVAL2 TRANSIENT RESPONSE
Output Current and Voltage Ripple
The output current and voltage ripple of the HIP6160EVAL2
is shown in Figure 8. The load current is 3.5A for this
oscillogram. Peak-to-peak voltage ripple is about 60mV
under these conditions.
V OUT
(50mV/DIV)
efficiency and reducing cost by eliminating a current sensing
resistor.
The over-current function cycles the soft-start function in a
hiccup mode to provide fault protection. A resistor (R OCSET,
R6) programs the over-current trip level. An internal 200 μ A
(typical) current sink develops a voltage across R OCSET that
is referenced to the VB secondary rail. When the voltage
across the upper MOSFET (also referenced to VB
secondary rail) exceeds the voltage across R OCSET , the
over-current function initiates a soft-start sequence. The
soft-start function discharges C SS with a 10 μ A current sink
and inhibits PWM operation. The soft-start function
recharges C SS , and PWM operation resumes with the error
amplifier clamped to the SS voltage. Should an overload
occur while recharging C SS , the soft start function inhibits
PWM operation while fully charging C SS to 4V to complete
its cycle. The converter dissipates very little power with this
method.
I LOAD
r DS ( ON )
(50mA/DIV)
TIME (2us/DIV)
FIGURE 8. ISL6160EVAL2 OUTPUT RIPPLE
OC Protection
With the ISL6160EVAL2 Class I power supply concept there
are two areas of OC protection. The ISL6160 limits the
current into the port, whereas the HIP6006 will limit current
to the load.
The over-current function will trip at a peak inductor current
(I PEAK) determined by:
I OCSET ? R OCSET
I PEAK = ---------------------------------------------------
where I OCSET is the internal OCSET current source (200 μ A
- typical). The OC trip point varies mainly due to the
MOSFETs r DS(ON) variations. To avoid over-current tripping
in the normal operating load range, find the R OCSET resistor
from the equation above with:
1. The maximum r DS(ON) at the highest junction
temperature.
ISL6160 OC Protection
The ISL6160EVAL2 is designed to input current limit to 2.8A,
the max. specified peak current for a 25W port. This allows a
maximum output current of ~3.5A at 5V output voltage. As
2. The minimum I OCSET from the specification table.
3. Determine I PEAK for I PEAK > I OU T ( MAX ) + ( ? I ) ? 2
where ? I is the output inductor ripple current.
,
Iout increases above 3.5A the input current ripple peaks
increase and are limited to 2.8A, beyond this point the
ISL6160 reduces Q3 gate drive for current regulation (CR),
causing a decrease in overall efficiency but protecting the
VB primary rail. A lower limit based on the particular IM
needs can be implemented to ‘tighten’ power budget control.
3
A small ceramic capacitor should be placed in parallel with
R OCSET to smooth the voltage across R OCSET in the
presence of switching noise on the input voltage.
Figure 9 illustrates the ISL6160EVAL2 OC operational
waveforms. The 5V DC-DC output is shorted and 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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