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参数资料
| 型号： | BCD48BH120T120A00 |
| 厂商： | Vicor Corporation |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | HALF-CHIP BUS CONVERTER EVAL BOA |
| 产品培训模块： | VI Chip Bus Converter Modules |
| 标准包装： | 1 |
| 系列： | V-I Chip™, BCM™ |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，隔离 |
| 功率 - 输出： | 120W |
| 输出电压： | 12V |
| 电流 - 输出： | 11.3A |
| 输入电压： | 38 ~ 55 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 1.75MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | BCM48BH120T120A |
| 其它名称： | 1102-1185 BCD48BH120T120A00-ND |
BCM48BH120T120A00 - BCM48BH120M120A00
7.0 CURRENT SHARING
The SAC topology bases its performance on efficient transfer
of energy through a transformer, without the need of closed
loop control. For this reason, the transfer characteristic can be
approximated by an ideal transformer with some resistive drop
and positive temperature coefficient.
This type of characteristic is close to the impedance characteristic
of a DC power distribution system, both in behavior
(AC dynamic) and absolute value (DC dynamic).
When connected in an array (with same K factor), the BCM
module will inherently share the load current with parallel
units, according to the equivalent impedance divider that the
system implements from the power source to the point of load.
It is important to notice that, when successfully started, BCMs
are capable of bidirectional operations (reverse power transfer
is enabled if the BCM input falls within its operating range and
the BCM is otherwise enabled). In parallel arrays, because of
the resistive behavior, circulating currents are never experienced,
because of energy conservation law.
General recommendations to achieve matched array impedances
are (see also AN016 for further details):
? to dedicate common copper planes within the PCB to
deliver and return the current to the modules
? to make the PCB layout as symmetric as possible
? to apply same input/output filters (if present) to each unit
Figure 17 – BCM Array
Rev. 2.0
V?I CHIP INC. (A VICOR COMPANY) 25 FRONTAGE RD. ANDOVER, MA 01810 800-735-6200
12/10
Page 13 of 16
v i c o r p o w e r. c o m
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