参数资料
型号: NCP3101BUCK2GEVB
厂商: ON Semiconductor
文件页数: 19/26页
文件大小: 0K
描述: EVAL BOARD FOR NCP3101BUCK2G
设计资源: NCP3101BUCK2 EVB BOM
NCP3101BUCK2GEVB Gerber Files
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: 1.5V
电流 - 输出: 6A
输入电压: 5V
稳压器拓扑结构: 降压
板类型: 完全填充
已供物品:
已用 IC / 零件: NCP3101
其它名称: NCP3101BUCK2GEVBOS
NCP3101C
In practical design, the feed through resistor should be at 2X
the value of R 2 to minimize error from high frequency feed
through noise. Using the 2X assumption, R F will be set to
20 k W and the feed through capacitor can be calculated as
shown below:
31.6 k W ) 10 k W
C F +
R 1 ) R 2
2 p * R 1 * R F ) R 2 * R F ) R 2 * R 1 * f cross
3 214 pF +
(eq. 44)
2 * p * 31.6 k W * 20 k W ) 10 k W * 20 k W ) 10 k W * 31.6 k W * 27 kHz
C F = Feed through capacitor
f cross = Crossover frequency
R 1 = Top resistor divider
R 2 = Bottom resistor divider
R F = Feed through resistor
The crossover of the overall feedback occurs at F PO :
2 p * C F 2 R 1 ) R F * R 2 ) R 1 * R F * R F ) R 1
F PO +
2
R 1 ) R F
*
V ramp
F LC * V IN
(eq. 45)
2 p * 214 pF
18.9 kHz +
2
2
31.6 k W ) 20 k W
31.6 k W ) 20 k W * 10 k W ) 31.6 k W * 20 k W 20 k W ) 31.6 k W
*
1.1 V
2.35 kHz * 12 V
C F
f cross
F LC
F PO
R 1
R 2
R F
VCC
V ramp
= Feed through capacitor
= Crossover frequency
= Frequency of the output inductor and capacitor
= Pole frequency
= Top of resistor divider
= Bottom of resistor divider
= Feed through resistor
= Input voltage
= Peak ? to ? peak voltage of the ramp
http://onsemi.com
19
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