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参数资料
| 型号： | VEFT1-S12-S3.3-SMT |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 1 W DC-DC UNREG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, PLASTIC, SMD-12/10 |
| 文件页数： | 3/3页 |
| 文件大小： | 217K |
| 代理商： | VEFT1-S12-S3.3-SMT |
rev.
page
date
DESCRIPTION: single output series dc-dc converter
3 of 3
10/2009
20050
SW 112th Ave. Tualatin, Oregon 97062
phone
phone 503.612.2300 fax
www.v-infinity.com
fax 503.612.2383
PART NUMBER: VEFT1-SMT
APPLICATION NOTES:
- Input filtering
To reduce the reflected ripple current and minimize
EMI, especially when the converter input is more
than 2” away from the DC source, it is recommended
to connect a low ESR electrolytic capacitor between
Vin and Gnd. The values suggested are as shown in
Table 1. If additional filtering is required, the
capacitance may be increased, or expanded to an LC
network as shown in Figure 1.
Input Voltage
External Input Capacitance
4.7 μF
5 V
12 V
2.2 μF
24 V
1.0 μF
TABLE 1
- Output filtering
An output capacitor is needed to meet output ripple
requirements as shown in Table 2.
Output capacitance may be increased for additional
filtering, but should not exeed 10μF or expanded to
an LC network as in Figure 1.
Vout
External Ouput Capacitance
10 μF
5 V
9 V
4.7 μF
12 V
2.2 μF
15 V
1 μF
24 V
0.47 μF
TABLE 2
<Figure 1>
DC
C
L
DC
C
-Vin
+Vin
-Vout
+Vout
REG
DC DC
REG
-Vin
+Vin
+Vout
-Vout
+Vout
+Vin
-Vin
- Minimum loading
The converter needs a minimum of 10% loading to
maintain output regulation. Operation under no-load
conditions will not cause immediate damages but
may reduce reliability, and cause performance not to
meet specifications.
- Regulation
With a semi-regulated design, the converter ’s output
voltage varies with load current and will change
proportionally to the input voltage. If regulated
output is needed, an external regulator can be used
as shown in Figure 2.
- Protection
The converter has minimal protection against input
over-voltage or output over-load, and may be
permanently damaged if exposed to these conditions.
An input clamping device can be used for input
voltage limiting. An input fuse or an output fuse
can also be used to protect against over-loading.
- External Regulator
An external 3-terminal regulator can be connected
to the output of the converter to achieve full
regulation. Make sure the converter ’s output voltage
provides sufficient head room for the regulator. An
additional benefit is that the built-in protection
features in the regulator, such as OCP, OTP, etc, will
protect the converter also. In a complimentory
supply, a negative output regulator must be used to
achieve the negative regulated output.
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相关代理商/技术参数 |
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| VEFT1-S12-S5-SMT | 功能描述:CONVERTER DC/DC 1W 5V 200MA RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:V-Infinity VEFT1-SMT 产品培训模块:Low Power DC-DC Converters 3D 型号:VBT2-S5-S15-SMT 标准包装:1 系列:V-Infinity VBT2-SMT 类型:隔离 输出数:1 电压 - 输入（最小）:4.5V 电压 - 输入（最大）:5.5V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:133mA 电源（瓦） - 制造商系列:2W 电压 - 隔离:1kV（1000V） 特点:- 安装类型:表面贴装 封装/外壳:14-DIP SMD 模块（12 引线） 尺寸/尺寸:0.70" L x 0.50" W x 0.23" H（17.8mm x 12.7mm x 5.8mm） 包装:Digi-Reel® 工作温度:-40°C ~ 85°C 效率:84% 电源（瓦特）- 最大:2W 产品目录页面:2745 (CN2011-ZH PDF) 其它名称:102-2079-6 |
| VEFT1-S12-S5-SMT-TR | 制造商:CUI Inc 功能描述:CONVERTER DC/DC 1W 5V 200MA 制造商:CUI Inc 功能描述:VEFT1-S-SMT Series 5 V 200 mA 1 W Single Output DC-DC Isolated Converter |
| VEFT1-S15-D12-SMT | 制造商:CUI 制造商全称:CUI INC 功能描述:Dual Output Series Dc-Dc Converter |
| VEFT1-S15-D15-SMT | 制造商:CUI 制造商全称:CUI INC 功能描述:Dual Output Series Dc-Dc Converter |
| VEFT1-S15-D5-SMT | 制造商:CUI 制造商全称:CUI INC 功能描述:Dual Output Series Dc-Dc Converter |
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