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参数资料
| 型号： | NCP1421LEDEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/14页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR NCP1421LED |
| 设计资源： | NCP1421LEDEVB BOM NCP1421LEDEVB Schematic NCP1421LEDEVB Gerber Files |
| 标准包装： | 1 |
| 电流 - 输出 / 通道： | 600mA |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 3.5V |
| 输入电压： | 3.6V |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP1421 |
| 其它名称： | NCP1421LEDEVBOS |
NCP1421
From the previous calculations, you need at least 18.75
m F in order to achieve the specified ripple level at the
conditions stated. Practically, a capacitor that is one level
larger is used to accommodate factors not taken into
account in the calculations. Therefore, a capacitor value of
22 m F is selected. The NCP1421 is internally compensated
for most applications, but in case additional compensation
16
14
12
is required, the capacitor C4 can be used as external
compensation adjustment to improve system dynamics.
In order to provide an easy way for customers to select
external parts for NCP1421 in different input voltage and
output current conditions, values of inductance and
capacitance are suggested in Figure 27, 28 and 29.
21
18
15
10
12
8
6
4
I OUT = 500 mA
9
6
2
3
I OUT = 500 mA
0
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
0
1.6
1.9
2.2
2.5
2.8
3.1
3.4
3.7
4.0
INPUT VOLTAGE (V)
Figure 27. Suggested Inductance of V OUT = 3.3 V
40
INPUT VOLTAGE (V)
Figure 28. Suggested Inductance of V OUT = 5.0 V
25
35
30
25
20
15
V OUT?RIPPLE = 40 mV
V OUT?RIPPLE = 45 mV
33
50
10
5
0
V OUT?RIPPLE = 50 mV
100
200
250
300
350
400
450
500
550
600
OUTPUT CURRENT (mA)
Figure 29. Suggested Capacitance for Output Capacitor
Table 1. Suggestions for Passive Components
Output Current
500 mA
250 mA
Inductors
Sumida CR43, CR54,CDRH6D28 series
Sumida CR32 series
Capacitors
Panasonic ECJ series
Kemet TL494 series
Panasonic ECJ series
Kemet TL494 series
http://onsemi.com
12
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相关代理商/技术参数 |
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|---|---|
| NCP1421LEDGEVB | 功能描述:EVAL BOARD FOR NCP1421 RoHS:是 类别:编程器，开发系统 >> 评估板 - LED 驱动器 系列:- 标准包装:1 系列:PowerWise® 电流 - 输出 / 通道:20mA 输出及类型:1，非隔离 输出电压:17V 特点:可调光 输入电压:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相关产品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD |
| NCP1422EVB | 功能描述:电源管理IC开发工具 ANA NCP1422 EVAL BRD 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 |
| NCP1422LEDEVB | 功能描述:LED 照明开发工具 ANA NCP1422LED EVAL BRD RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| NCP1422LEDGEVB | 功能描述:LED 照明开发工具 RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| NCP1422MNR2 | 功能描述:直流/直流开关转换器 800mA PFM Boost 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 |
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