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| 型号： | EVAL-ADUM3070EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADUM3070 |
| 标准包装： | 1 |
| 系列： | iCoupler® |
| 主要目的： | 板，隔离式电源 |
| 输出及类型： | 3，隔离 |
| 输出电压： | 5V，7.5V，15V |
| 输入电压： | 5V |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ADuM3070 |
UG-402
OTHER SECONDARY ISOLATED SUPPLY
CONFIGURATIONS
The double supply can be configured for 12 V regulated and 6 V
unregulated secondary isolated supplies by short-circuiting R17
with a 0 ? resistor for R18. The regulated supply voltage is set
by the fraction of it that is fed back to the ADuM3070 via the
voltage divider comprising R16, R17, R32, and R18. The voltage
at the feedback pin is 1.25 V. With R18 open-circuited, the
ADuM3070 feedback voltage is approximately 1.25 V if VISO2
is 15 V. When R18 is short-circuited, the feedback voltage is
approximately 1.25 V if VISO2 is 12 V (see the ADuM3070 data
sheet for more details on setting the secondary isolated output
supply voltage). Figure 15 shows the efficiency curves for both
output settings at 500 kHz with the 1:5 Coilcraft transformer.
Positive and Negative Outputs
The double supply can be set up as a positive and negative ±15 V
supply by changing the transformer to a turns ratio 1CT:5CT
transformer (see the ADuM3070 data sheet for more information
on these transformers). Other changes begin with removing the
0 ? resistors from R24 and R22 and inserting them into R23 and
Evaluation Board User Guide
become the ?15 V supply. Short-circuiting R21 instead of R22
connects the transformer center tap to the ground plane instead
of the node where L3, C12, and C13 are connected. Figure 16
shows which resistors should be short-circuited and open-
circuited for the double supply or positive and negative supply
configurations. Note that the negative supply is unregulated.
The positive and negative supplies can be set for ±12 V instead
of ±15 V by short-circuiting R18.
Whereas the 15 V output can be regulated, the same problems
with regulation can happen as described in the Powering V REG
from the Unregulated 7.5 V Supply section. In addition, the
?15 V supply can vary over a wide range because it is unregulated
and influenced by the changes that happen on the 15 V output.
DOUBLE SUPPLY POSITIVE AND NEGATIVE SUPPLY
Figure 16. Double Supply Configuration with 0 ? Resistors (Red)
R21. Short-circuiting R23 instead of R24 makes the 7.5 V/6 V P7
SCHEMATIC
Figure 17. Double Supply Schematic
Rev. 0 | Page 8 of 12
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相关代理商/技术参数 |
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| EVAL-ADUM3190EBZ | 功能描述:界面开发工具 RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| EVAL-ADUM3221AEBZ | 功能描述:BOARD EVAL FOR ADUM3220/ADUM3221 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:iCoupler® 标准包装:1 系列:- 主要目的:数字电位器 嵌入式:- 已用 IC / 零件:AD5258 主要属性:- 次要属性:- 已供物品:板 相关产品:AD5258BRMZ1-ND - IC POT DGTL I2C1K 64P 10MSOPAD5258BRMZ10-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ100-ND - IC POT DGTL I2C 100K 64P 10MSOPAD5258BRMZ50-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ1-R7-ND - IC POT DGTL I2C 1K 64P 10MSOPAD5258BRMZ10-R7-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ50-R7-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ100-R7-ND - IC POT DGTL I2C 100K 64P 10MSOP |
| EVAL-ADUM3223AEBZ | 功能描述:BOARD EVAL FOR ADUM3223 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:iCoupler® 标准包装:1 系列:- 主要目的:数字电位器 嵌入式:- 已用 IC / 零件:AD5258 主要属性:- 次要属性:- 已供物品:板 相关产品:AD5258BRMZ1-ND - IC POT DGTL I2C1K 64P 10MSOPAD5258BRMZ10-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ100-ND - IC POT DGTL I2C 100K 64P 10MSOPAD5258BRMZ50-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ1-R7-ND - IC POT DGTL I2C 1K 64P 10MSOPAD5258BRMZ10-R7-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ50-R7-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ100-R7-ND - IC POT DGTL I2C 100K 64P 10MSOP |
| EVAL-ADUM330X | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad Isolators with isoPower Evaluation Board |
| EVAL-ADUM340X | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad Isolators with isoPower Evaluation Board |
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