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参数资料
| 型号： | SP6652LEDEB |
| 厂商： | Exar Corporation |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR SP6652LED |
| 标准包装： | 1 |
| 系列： | * |
APPLICATIONS INFORMATION
over frequency f zero = 80kHz (from the
Bode plot) divided by the loop gain band -
width, given as 20kHz, which is used in the
following equation:
Error Amp Gain
= f zero / (loop gain bandwidth)
= 80kHz / 20kHz
=4
The error amp transconductance is about
1mS, so this sets the R Z resistor to be:
Rz = 4/1mS = 4KΩ
We will use R Z = 4KΩ for the 3.3V output
compensation.
The zero for loop compensation is placed
at the first modulator pole of 4 kHz to pro -
vide a loop response of -20/dB/decade at
the crossover frequency. The compensa -
tion capacitor Cc can be calculated from
the crossover frequency pole1 and the R Z
value:
C C = 1/(2π? R Z ?pole1) = 1/(2π? 4K ?4kHz)
= 10nF
From the Typical Performance Charac -
teristics load step curves, the 2.5V output
and 3.3V output are stable with R Z = 4KΩ
and C C = 10nF. For 1.8V to 0.85V output,
the values R Z = 2KΩ and C C = 10nF are
recommended.
Figure 4. Typical SP6652 circuit layout.
Oct10-07 RevJ
SP6652 1A, High Efficiency, Current Mode PWM Buck Regulator
0
? 2007 Sipex Corporation
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相关代理商/技术参数 |
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| SP6654 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Efficiency 800mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery |
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| SP6654EB | 功能描述:DC/DC 开关控制器 Hi Efficiency 800mA Sync Buck Regulator RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| SP6654ER | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Efficiency 800mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery |
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