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参数资料
| 型号： | NCP3125CRAGEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 19/22页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION NCP3125 CERAMIC |
| 设计资源： | NCP3125 Schematic NCP3125CRAGEVB BOM |
| 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： | 最低可调至 0.8V |
| 电流 - 输出： | 4A |
| 输入电压： | 4.5 ~ 13.2 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 350kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP3125 |
| 其它名称： | NCP3125CRAGEVBOS |
NCP3125
I ICinrush_RMS 1 +
V IN
CIN ESR
1 *
t
1
DELAY_TOTAL
Inrush Current
NCP3125
Load
e
CINESR CIN
OR
0.316
5
CIN ESR C IN
t DELAY_TOTAL
(eq. 48)
1
e
0.316
t SS
R OUT
R OUT
1
12 V
380 mA + 1 *
0.1 W 16.45 ms
0.1 W 330 m F
5 0.1 W 330 m F
16.45 ms
C IN = Output capacitor
CIN ESR = Output capacitor ESR
t DELAY_TOTAL = Total delay interval
V IN = Input voltage
Once the t DELAY_TOTAL has expired, the buck converter
starts to switch and a second inrush current can be
calculated:
C OUT ) C LOAD V OUT D
I OCinrush_RMS + ) I CL D
3
(eq. 49)
Figure 27. Load Connected to the Output Stage
If the load is resistive in nature, the output current will
increase with soft ? start linearly which can be quantified in
Equation 50.
1 V OUT V OUT
I CLR _RMS + I CR_PK +
3
(eq. 50)
3.3 V 3.3 V
191 mA + 330 mA +
3 10 W 10 W
R OUT = Output resistance
V OUT = Output voltage
I CLR_RMS = RMS resistor current
I CR_PK = Peak resistor current
C OUT = Total converter output capacitance
C LOAD = Total load capacitance
D = Duty ratio of the load
I CL = Applied load at the output
I OCinrush_RMS = RMS inrush current during start ? up
t SS = Soft ? start interval
V OUT = Output voltage
From the above equation, it is clear that the inrush current
is dependant on the type of load that is connected to the
output. Two types of load are considered in Figure 27: a
resistive load and a stepped current load.
http://onsemi.com
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP3126ADR2G | 功能描述:直流/直流开关转换器 3A PWM Switching Buck Regulator RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP3126AGEVB | 功能描述:电源管理IC开发工具 NCP3126 EVB 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 |
| NCP3126CRAGEVB | 功能描述:电源管理IC开发工具 NCP3126 CERAMIC EVB 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 |
| NCP3127ADR2G | 功能描述:直流/直流开关转换器 2A PWM Switching Buck Regulator RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP3127AGEVB | 功能描述:电源管理IC开发工具 NCP3127 EVALUATION BOARD 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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