参数资料
型号: ISL6363CRTZ
厂商: Intersil
文件页数: 26/32页
文件大小: 0K
描述: IC CONTROLLER VR12 48TQFN
标准包装: 50
应用: 控制器,Intel VR12
输入电压: 5 V ~ 12 V
输出数: 2
输出电压: 0.25 V ~ 1.52 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 48-WFQFN 裸露焊盘
供应商设备封装: 48-TQFN-EP(6x6)
包装: 管件
ISL6363
conceptually shows T2(s) measurement set-up. The VR senses the
inductor current, multiplies it by a gain of the load line slope, then
adds it on top of the sensed output voltage and feeds it to the
compensator. T(1) is measured after the summing node, and T2(s)
is measured in the voltage loop before the summing node. The
spreadsheet gives both T1(s) and T2(s) plots. However, only T2(s)
can be actually measured on an ISL6363 regulator.
T1(s) is the total loop gain of the voltage loop and the droop loop.
It always has a higher crossover frequency than T2(s) and has
more meaning of system stability.
T2(s) is the voltage loop gain with closed droop loop. It has more
meaning of output voltage response.
Design the compensator to get stable T1(s) and T2(s) with
sufficient phase margin, and output impedance equal or smaller
than the load line slope.
Q1
L
VO
Q1
L
VO
V IN
GATE Q2
DRIVER
Cout
I O
VIN
GATE Q2
DRIVER
COUT
I O
LOAD LINE SLOPE
20
LOAD LINE SLOPE
20
LOOP GAIN =
LOOP GAIN =
MOD.
COMP
CHANNEL B
CHANNEL A
EA
VID
ISOLATION
TRANSFORMER
MOD. EA
COMP
CHANNEL B
CHANNEL A
VID
ISOLATION
TRANSFORMER
CHANNEL A
NETWORK
ANALYZER
EXCITATION OUTPUT
CHANNEL B
CHANNEL A
NETWORK
ANALYZER
EXCITATION OUTPUT
CHANNEL B
FIGURE 24. LOOP GAIN T1(s) MEASUREMENT SET-UP
26
FIGURE 25. LOOP GAIN T2(s) MEASUREMENT SET-UP
FN6898.1
September 5, 2013
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