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| 型号： | HIP6302EVAL1 |
| 厂商： | Intersil |
| 文件页数： | 2/11页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD HIP6302 |
| 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： | 1.7V |
| 电流 - 输出： | 35A |
| 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： | 板 |
| 已用 IC / 零件： | HIP6302 |
Application Note AN9888
The HIP6302EVAL1 evaluation board incorporates a
Start Up
reference design intended to meet the core-voltage
The waveforms in Figure 3 demonstrate the normal start-up
requirements for AMD Athlon ? microprocessors up to 35A.
Additional circuitry is provided to facilitate circuit evaluation
sequence with the HIP6302EVAL1 connected to a 55m ?
load. After FS/EN is released, VCORE exhibits a linear ramp
including input and output power connectors, VID jumpers,
until reaching its 1.7V set point. The gradual increase of
numerous probe points, an LED power-good indicator, and a
VCORE over approximately 5ms limits the current required
load-transient generator.
from the input supply, ICC5, to a level that does not strain the
Powering the HIP6302EVAL1
supply. The HIP6302 asserts PGOOD once VCORE is within
regulation limits.
For convenience, the HIP6302EVAL1 provides two methods
of making input power connections. The 20-pin header, J1,
interfaces with a standard ATX power supply and may be the
most convenient method of powering the board.
FS/EN, 5V/DIV
J2, J3, and J4 are standard banana-jack connectors that can
0V
VCORE, 1V/DIV
be used to supply power using bench-top power supplies.
These inputs provide greater versatility in testing and design
validation by allowing the 12V and 5V power-input voltage
levels to be varied independently. In this way power-on level
0V
ICC5, 10A/DIV
and power-sequencing issues can be easily examined.
To start the evaluation board, insert the 20-pin connector
0A
from an ATX supply into J1. If using bench-top supplies,
PGOOD, 5V/DIV
connect a 12V supply to J2 and a 5V supply to J3. Connect
0V
the grounds from both supplies to J4.
1ms/DIV
Important
FIGURE 3. HIP6302EVAL1 START-UP WAVEFORMS
There are two things to consider when using bench-top
supplies. If the 5V supply is applied prior to the 12V supply,
Transient Response
the HIP6302 will begin operating before the HIP6601As. This
allows the HIP6302 to complete its soft-start cycle before the
drivers are capable of switching power to the output. When
the 12V power input is then applied, there is a large transient
as the controller tries to instantly bring the output to its full-
voltage level. This can result in an overcurrent protection
cycle and an abnormal start-up waveform. It can be avoided
by applying 5V supply after or at the same time as the 12V
supply or by using an ATX power supply.
The HIP6302EVAL1 is equipped with a load-transient
generator that applies a 0–36A transient load current with
rise and fall rates of approximately 35A/ μ s. The duration of
the transient is between 100 μ s and 200 μ s, and the repetition
rate is kept low in order to limit power dissipation in the load
MOSFETs and resistors. Removal of the HI/LO jumper (JP2)
causes the current to decrease from about 36A to about
31A. The load-transient generator operates when the
HIP6302EVAL1 is properly connected to a 12V power
The second problem can occur when operating the transient
source and SW1 is in the ON position. Operation ceases
load generator. Not all bench-top and ATX power supplies
when SW1 is moved into the OFF position or 12V is
are capable of responding to load transients, and they may
removed from the board.
allow a momentary voltage dip on VCC5. This can activate
the power-on-reset function in the HIP6302 and cause the
output power to cycle. It can be remedied by connecting a
5600 μ F or larger capacitor between VCC5 and ground. The
capacitor, if necessary, simulates the distributed capacitance
that exists on the computer motherboard.
The HIP6302EVAL1 achieves the speci?ed transient
performance while maintaining a favorable balance between
low cost, high ef?ciency and small pro?le. When the duty
cycle changes rapidly in response to a transient load current,
the inductor current immediately begins to change in order to
meet the demand. During the time the inductor current is
increasing, the output-?lter capacitors are supplying the
load. It follows that the amount of required capacitance
decreases as the capability of the inductors to rapidly
assume the load current increases.
2
Athlon? is a trademark of Advanced Micro Devices, Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HIP6302V | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller |
| HIP6302VCB | 功能描述:IC REG CTRLR BUCK PWM 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| HIP6302VCB-T | 功能描述:IC REG CTRLR BUCK PWM 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| HIP6302VCBZ | 功能描述:电流型 PWM 控制器 TWO PHS SYNCH BUCK CNTRLR VRM 9 X RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| HIP6302VCBZ-T | 功能描述:电流型 PWM 控制器 2 PHS SYNCH BUCK CTR VRM 9 X W/VID ON RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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