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參數(shù)資料
| 型號(hào)： | SP6120 |
| 英文描述： | Fixed Frequency, Voltage Mode, Synchronous PWM Controller(固定頻率，電壓模式同步PWM（脈寬調(diào)制控制器）) |
| 中文描述： | 固定頻率，電壓模式，同步PWM控制器（固定頻率，電壓模式同步的PWM（脈寬調(diào)制控制器）） |
| 文件頁(yè)數(shù)： | 18/20頁(yè) |
| 文件大?。?/td> | 187K |
| 代理商： | SP6120 |
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18
Rev. 2/15/01
SP6120 Low Voltage, AnyFET
TM
, Synchronous, Buck Controller Copyright 2001 Sipex Corporation
P
Layout Guideline
PCB layout plays a critical role in proper func-
tion of the converters and EMI control. In switch
mode power supplies, loops carrying high di/dt
give rise to EMI and ground bounces. The goal
of layout optimization is to identify these loops
and minimize them. It is also crucial on how to
connect the controller ground such that its op-
eration is not affected by noise. The following
guideline should be followed to ensure proper
operation.
1. A ground plane is recommended for mini-
mizing noises, copper losses and maximizing
heat dissipation.
2. Connect the ground of feedback divider, com-
pensation components, oscillator resistor and
soft-start capacitor to the GND pin of the IC.
Then connect this pin as close as possible to
the ground of the output capacitor.
3. The V
CC
bypass capacitor should be right
next to the Vcc and GND pin.
4. The traces connecting to feedback resistor
and current sense components should be short
and far away from the switch node, and switch-
ing components.
5. Connect the PGND pin close to the source of
the bottom MOSFET, and the SWN pin to the
source of the top MOSFET. Minimize the
trace between GH/GL and the gates of the
MOSFETs. All of these requirements reduce
the impedance driving the MOSFETs. This is
especially important for the bottom MOSFET
that tends to turn on through its miller capaci-
tor when the switch node swings high.
6. Minimize the loop composed of input capaci-
tors, top/bottom MOSFETs and Schottky di-
ode, This loop carries high di/dt current. Also
increase the trace width to reduce copper
losses.
7. Maximize the trace width of the loop con-
necting the inductor, output capacitors,
Schottky diode and bottom MOSFET.
相關(guān)PDF資料 |
PDF描述 |
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| SP6122ACU-15 | Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters |
| SP6122CU | Evaluation Board Manual |
| SP6122EB | Evaluation Board Manual |
| SP6122UEB | Evaluation Board Manual |
| SP6122ACU-1.5 | Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6120_05 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, AnyFETTM, Synchronous,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
| SP612-05 | 制造商:Delphi Corporation 功能描述:WIRE STOP |
| SP612-07 | 制造商:Delphi Corporation 功能描述:LOCATOR |
| SP612-08 | 制造商:Delphi Corporation 功能描述:PIVOT PIN |
| SP6120B | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage, AnyFETTM, Synchronous ,Buck Controller Ideal for 2A to 10A, High Performance, DC-DC Power Converters |
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