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| 型號(hào)： | SP6138 |
| 英文描述： | Evaluation Board Manual |
| 中文描述： | 評(píng)估板手冊(cè) |
| 文件頁數(shù)： | 5/9頁 |
| 文件大小： | 304K |
| 代理商： | SP6138 |
Aug 24-06 SP6138 Evaluation Manual 2006 Sipex Corporation
Page 5 of 9
LOOP COMPENSATION DESIGN
The open loop gain of the SP6138 Evaluation Board can be divided into the gain of the
error amplifier
G
AMP
(s)
, PWM modulator
G
PWM
, buck converter output stage
G
OUT
(s)
,
and feedback resistor divider
G
FBK
. In order to crossover at the selected frequency
f
co
,
the gain of the error amplifier must compensate for the attenuation caused by the rest of
the loop at this frequency. The goal of loop compensation is to manipulate the open
loop frequency response such that its gain crosses over 0dB at a slope of –20dB/dec.
The open loop crossover frequency should be higher than the ESR zero of the output
capacitors but less than 1/5 of the switching frequency
f
s
to insure proper operation.
Since the SP6138EB is designed with ceramic type output capacitors, a Type III
compensation circuit is required to give a phase boost of 180
°
in order to counteract the
effects of the output
LC
underdamped resonance double pole frequency.
Figure 11. SP6138EB Voltage Mode Control Loop with Loop Dynamic
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP6138_06 | Evaluation Board Manual |
| SP6138EB | Evaluation Board Manual |
| SP6138ER1 | Evaluation Board Manual |
| SP6139 | Busway FS Plug-In 600A |
| SP6139EU | Wide Input, 1.3MHz Synchronous PWM Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP6138_06 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP6138EB | 功能描述:DC/DC 開關(guān)控制器 Synchronous Buck Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| SP6138ER1 | 制造商:Exar Corporation 功能描述: |
| SP6138ER1/TR | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Synchronous Buck Controller |
| SP6138ER1-L | 制造商:Exar Corporation 功能描述:CONTROLLER SYNCH BUCK SMD QFN-16 |
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