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参数资料
| 型号： | NCP3101BUCK2GEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 20/26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： | 板 |
| 已用 IC / 零件： | NCP3101 |
| 其它名称： | NCP3101BUCK2GEVBOS |
NCP3101C
C C +
R C +
3
2 * F LC * C C *
) f cross * CO ESR * C OUT
I SS
The cross over combined compensation network can be
used to calculate the transconductance output compensation
network as follows:
1 R 2
* * gm 3 (eq. 46)
F PO R 2 * R 1
1 10 k W
43.3 nF + * * 3.4 mS
18.9 kHz 10 k W ) 31.6 k W
C C = Compensation capacitor
F PO = Pole frequency
gm = Transconductance of amplifier
R 1 = Top of resistor divider
R 2 = Bottom of resistor divider
1
2
2
t SS + 3
1.31 ms +
C P = Compensation pole capacitor
C C = Compensation capacitor
D = Duty ratio
I SS = Soft ? start current
t SS = Soft ? start interval
V ramp = Peak ? to ? peak voltage of the ramp
C P ) C C * D * V ramp
0.309 nF ) 43 nF * 27.5% * 1.1 V
10 m A
V
900 mV
(eq. 50)
5.05 k W +
1
(eq. 47)
Vcomp
2 * 2.35 kHz * 43.3 nF *
2
2
) 27 kHz * 12 m W * 820 m F
C P + C OUT * 3
R C * 2 * p
C C = Compensation capacitance
CO ESR = Output capacitor ESR
C OUT = Output capacitance
f cross = Crossover frequency
F LC = Output inductor and capacitor frequency
R C = Compensation resistor
CO ESR
(eq. 48)
12 m W
309 pF + 820 m F *
5.05 k W * 2 * p
CO ESR = Output capacitor ESR
C OUT = Output capacitor
C P = Compensation pole capacitor
R C = Compensation resistor
Calculating Soft ? Start Time
To calculate the soft start delay and soft start time, the
following equations can be used.
Vout
Figure 31. Soft Start Ramp
The delay from the charging of the compensation network
to the bottom of the ramp is considered t ss delay . The total
delay time is the addition of the current set delay and t ss delay ,
which in this case is 3.2 ms and 3.59 ms respectively, for a
total of 6.79 ms.
Calculating Input Inrush Current
The input inrush current has two distinct stages: input
charging and output charging. The input charging of a buck
stage is usually not controlled, and is limited only by the
input RC network and the output impedance of the upstream
power stage. If the upstream power stage is a perfect voltage
source, then the input charge inrush current can be depicted
as shown in Figure 32 and calculated as:
t SSdelay +
3.59 ms +
C P ) C C * 0.9 V
I SS
0.309 nF ) 43 nF * 0.83 V
10 m A
(eq. 49)
IPK
C P
C C
I SS
= Compensation pole capacitor
= Compensation capacitor
= Soft start current
TIME
Figure 32. Input Charge Inrush Current
The time the output voltage takes to increase from 0 V to a
regulated output voltage is t ss as shown in Equation 50:
http://onsemi.com
20
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相关代理商/技术参数 |
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| NCP3101CMNTXG | 功能描述:直流/直流开关调节器 INTEGRATED SWITCHER RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| NCP3101MNTXG | 功能描述:直流/直流开关调节器 6A SYNC BUCK CNVERTR RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| NCP3102BMNTXG | 功能描述:直流/直流开关调节器 10A SYNC BUCK CNVRTR RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| NCP3102BUCK1GEVB | 功能描述:电源管理IC开发工具 NCP3102 DEMO BD 100X110M RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP3102BUCK2GEVB | 功能描述:电源管理IC开发工具 NCP3102 DEMO BD 55X25MM RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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